/* StudyMaze design system
   Vernacular: standardized-testing (scantron bubble sheets, red-pen grading,
   gradebooks) — precise, quietly rewarding, never twee. */

:root {
  --color-paper: #EDEFEF;
  --color-surface: #FFFFFF;
  --color-ink: #191B1E;
  --color-graphite: #6B7178;
  --color-graphite-faint: rgba(107, 113, 120, 0.18);
  --color-red-pen: #C22A2A;
  --color-check-green: #2E6E49;
  --color-pencil-blue: #2F4C73;

  --color-graphite-rgb: 107, 113, 120;
  --color-red-pen-rgb: 194, 42, 42;
  --color-check-green-rgb: 46, 110, 73;
  --color-pencil-blue-rgb: 47, 76, 115;

  --color-highlighter: #F7E01D;
  --color-highlighter-rgb: 247, 224, 29;
  --color-highlighter-ink: #191B1E;

  --color-nav-bg: #191B1E;
  --color-nav-text: #EDEFEF;
  --color-nav-text-muted: rgba(237, 239, 239, 0.72);
  --color-nav-hover-bg: rgba(237, 239, 239, 0.1);
  --color-nav-active-bg: #EDEFEF;
  --color-nav-active-text: #191B1E;

  --shadow-card: 0 1px 2px rgba(25, 27, 30, 0.04), 0 6px 16px rgba(25, 27, 30, 0.04);
  --shadow-lift: 0 2px 4px rgba(25, 27, 30, 0.05), 0 14px 28px rgba(25, 27, 30, 0.09);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-full: 999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;

  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Source Serif 4", serif;
  --font-mono: "IBM Plex Mono", monospace;

  color-scheme: light;
}

/* Night grading: same vernacular, lamp-lit desk instead of daylight paper. */
[data-theme="dark"] {
  --color-paper: #14161A;
  --color-surface: #1E2126;
  --color-ink: #EDEFEF;
  --color-graphite: #9AA0A8;
  --color-graphite-faint: rgba(255, 255, 255, 0.14);
  --color-red-pen: #E2574F;
  --color-check-green: #4FAE7C;
  --color-pencil-blue: #6F9BD1;

  --color-graphite-rgb: 154, 160, 168;
  --color-red-pen-rgb: 226, 87, 79;
  --color-check-green-rgb: 79, 174, 124;
  --color-pencil-blue-rgb: 111, 155, 209;

  --color-highlighter: #EFD91F;
  --color-highlighter-rgb: 239, 217, 31;
  --color-highlighter-ink: #14161A;

  --color-nav-bg: #24272D;
  --color-nav-text: #EDEFEF;
  --color-nav-text-muted: rgba(237, 239, 239, 0.65);
  --color-nav-hover-bg: rgba(237, 239, 239, 0.08);
  --color-nav-active-bg: #EDEFEF;
  --color-nav-active-text: #14161A;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 16px rgba(0, 0, 0, 0.3);
  --shadow-lift: 0 2px 4px rgba(0, 0, 0, 0.35), 0 14px 28px rgba(0, 0, 0, 0.4);

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

/* The hidden attribute must win over any display rule on the same element
   (e.g. .vocab-view's flex, .btn's inline-flex). */
[hidden] {
  display: none !important;
}

html {
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--color-paper);
  overflow-x: hidden;
  color: var(--color-ink);
  margin: 0;
  padding: 0;
  line-height: 1.5;
  transition: background-color 0.2s ease, color 0.2s ease;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }

  html.js-reveal .reveal {
    opacity: 1;
    transform: none;
  }
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  font-weight: 600;
  margin: 0 0 var(--space-4);
}

h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }

a {
  color: var(--color-pencil-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus {
  outline: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-pencil-blue);
  outline-offset: 2px;
}

/* ---- Top nav ---- */

.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--color-nav-bg);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-6);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: var(--space-4);
  z-index: 40;
}

.topnav-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-nav-text);
  letter-spacing: 0.01em;
}

.topnav-logo {
  display: block;
}

.topnav-brand:hover {
  text-decoration: none;
  color: var(--color-nav-text);
}

.topnav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.topnav-link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.88rem;
  color: var(--color-nav-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.topnav-link:hover {
  color: var(--color-nav-text);
  text-decoration: none;
  background: var(--color-nav-hover-bg);
}

.topnav-link.is-active {
  color: var(--color-nav-active-text);
  background: var(--color-nav-active-bg);
}

.topnav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--color-nav-text);
  border-radius: var(--radius-full);
  cursor: pointer;
}

.topnav-toggle:hover {
  background: var(--color-nav-hover-bg);
}

.topnav-toggle svg {
  width: 22px;
  height: 22px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  margin-left: var(--space-1);
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-nav-text-muted);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--color-nav-text);
  background: var(--color-nav-hover-bg);
}

.theme-toggle svg {
  width: 17px;
  height: 17px;
}

.theme-toggle .icon-moon {
  display: block;
}

.theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

@media (max-width: 900px) {
  .topnav-toggle {
    display: inline-flex;
  }

  .topnav-links {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    background: var(--color-nav-bg);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  }

  .topnav-links.is-open {
    display: flex;
  }

  .topnav-link {
    width: 100%;
  }

  .theme-toggle {
    align-self: flex-start;
  }
}

/* ---- Flash messages ---- */

.flashes {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.flash {
  margin: 0;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.92rem;
  border: 1px solid transparent;
}

.flash-success {
  color: var(--color-check-green);
  background: rgba(var(--color-check-green-rgb), 0.1);
  border-color: rgba(var(--color-check-green-rgb), 0.3);
}

.flash-error {
  color: var(--color-red-pen);
  background: rgba(var(--color-red-pen-rgb), 0.08);
  border-color: rgba(var(--color-red-pen-rgb), 0.3);
}

.form-notice {
  margin: 0 0 var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--color-pencil-blue);
  background: rgba(var(--color-pencil-blue-rgb), 0.08);
  border: 1px solid rgba(var(--color-pencil-blue-rgb), 0.25);
}

/* ---- Cards ---- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
}

.card + .card,
.card + .stat-row {
  margin-top: var(--space-6);
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.card-meta {
  color: var(--color-graphite);
  font-size: 0.92rem;
  margin: 0 0 var(--space-4);
}

.card-actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.section {
  margin-top: var(--space-8);
}

.section:first-child {
  margin-top: 0;
}

/* ---- Pills / badges ---- */

.pill {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  background: rgba(var(--color-graphite-rgb), 0.1);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
}

.pill-accent {
  color: var(--color-pencil-blue);
  background: rgba(var(--color-pencil-blue-rgb), 0.08);
  border-color: rgba(var(--color-pencil-blue-rgb), 0.25);
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.88rem;
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-6);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-pencil-blue);
  color: #fff;
}

.btn-primary:hover {
  background: #25395c;
  color: #fff;
}

.btn-danger {
  background: transparent;
  border-color: var(--color-red-pen);
  color: var(--color-red-pen);
}

.btn-danger:hover {
  background: var(--color-red-pen);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-graphite-faint);
  color: var(--color-ink);
}

.btn-ghost:hover {
  background: rgba(var(--color-graphite-rgb), 0.1);
  color: var(--color-ink);
}

/* ---- Forms ---- */

form p {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
  margin: 0 0 var(--space-4);
  max-width: 420px;
}

form p:last-child {
  margin-bottom: 0;
}

form label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-graphite);
}

input:not([type="submit"]):not([type="button"]), select, textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  width: 100%;
}

textarea {
  resize: vertical;
}

input:focus-visible, select:focus-visible, textarea:focus-visible {
  border-color: var(--color-pencil-blue);
}

/* ---- Form grid / fields ---- */

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5) var(--space-6);
}

@media (max-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.field-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.card--auth {
  max-width: 420px;
  margin: 0 auto;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.field--full {
  grid-column: 1 / -1;
}

.field-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color-graphite);
}

.field-control {
  position: relative;
  display: flex;
}

.field-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  color: var(--color-graphite);
  pointer-events: none;
}

.field-control--icon input.form-input,
.field-control--icon select.form-select {
  padding-left: 40px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1.5px solid var(--color-graphite-faint);
  border-radius: var(--radius-sm);
  padding: 10px var(--space-4);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-textarea {
  resize: vertical;
  min-height: 88px;
}

.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
  outline: none;
  border-color: var(--color-pencil-blue);
  box-shadow: 0 0 0 3px rgba(var(--color-pencil-blue-rgb), 0.15);
}

.form-select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 36px;
  cursor: pointer;
}

.field-control--select::after {
  content: "";
  position: absolute;
  right: 15px;
  top: 50%;
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--color-graphite);
  border-bottom: 2px solid var(--color-graphite);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}

.field--invalid .form-input,
.field--invalid .form-select,
.field--invalid .form-textarea {
  border-color: var(--color-red-pen);
}

.field-error {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.78rem;
  color: var(--color-red-pen);
}

.field-hint {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-graphite);
}

.field-checkbox {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.field-checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.field-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
  flex-shrink: 0;
  position: relative;
  top: 3px;
}

.field-checkbox label {
  flex: 1;
  min-width: 0;
}

.field-checkbox label {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-graphite);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-graphite-faint);
}

/* ---- Date picker ---- */

.datepicker {
  position: relative;
  display: flex;
  width: 100%;
}

.datepicker-input {
  padding-right: 40px;
}

.datepicker-input::-webkit-calendar-picker-indicator {
  opacity: 0;
  position: absolute;
  right: 0;
  width: 40px;
  height: 100%;
  margin: 0;
  pointer-events: none;
}

.datepicker-trigger {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-graphite);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.datepicker-trigger:hover {
  background: rgba(var(--color-graphite-rgb), 0.12);
  color: var(--color-ink);
}

.datepicker-trigger svg {
  width: 17px;
  height: 17px;
}

.datepicker-panel {
  display: none;
  position: absolute;
  z-index: 20;
  top: calc(100% + 6px);
  left: 0;
  width: 272px;
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-4);
}

.datepicker-panel.is-open {
  display: block;
}

.datepicker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.datepicker-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--color-ink);
}

.datepicker-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-graphite);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.datepicker-nav:hover {
  background: rgba(var(--color-graphite-rgb), 0.12);
  color: var(--color-ink);
}

.datepicker-nav svg {
  width: 15px;
  height: 15px;
}

.datepicker-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-graphite);
  margin-bottom: var(--space-1);
}

.datepicker-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.datepicker-day {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-ink);
  cursor: pointer;
}

button.datepicker-day {
  transition: background-color 0.15s ease, color 0.15s ease;
}

button.datepicker-day:hover {
  background: rgba(var(--color-pencil-blue-rgb), 0.12);
}

.datepicker-day.is-outside {
  color: rgba(var(--color-graphite-rgb), 0.4);
  cursor: default;
}

.datepicker-day.is-today {
  color: var(--color-pencil-blue);
  font-weight: 600;
}

.datepicker-day.is-selected {
  background: var(--color-pencil-blue);
  color: #fff;
}

.datepicker-today {
  display: block;
  width: 100%;
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border: none;
  border-top: 1px solid var(--color-graphite-faint);
  background: transparent;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-pencil-blue);
  cursor: pointer;
  text-align: center;
}

.datepicker-today:hover {
  text-decoration: underline;
}

/* ---- Tables ---- */

table {
  border-collapse: collapse;
  width: 100%;
}

thead th {
  text-align: left;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--color-graphite-faint);
  white-space: nowrap;
}

tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-graphite-faint);
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: none;
}

th.numeric, td.numeric {
  text-align: right;
}

td.mono, th.mono, td.numeric, th.numeric {
  font-family: var(--font-mono);
}

.table-wrap {
  overflow-x: auto;
}

/* ---- Stat cards ---- */

.stat-row {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.stat-card {
  flex: 1 1 160px;
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-6);
}

.stat-card--icon {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.stat-card--icon .stat-card-value,
.stat-card--icon .stat-card-label {
  display: block;
}

.stat-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-card-icon svg {
  width: 22px;
  height: 22px;
}

.stat-card-icon--blue {
  background: rgba(var(--color-pencil-blue-rgb), 0.12);
  color: var(--color-pencil-blue);
}

.stat-card-icon--red {
  background: rgba(var(--color-red-pen-rgb), 0.12);
  color: var(--color-red-pen);
}

.stat-card-icon--green {
  background: rgba(var(--color-check-green-rgb), 0.12);
  color: var(--color-check-green);
}

.stat-card-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1;
}

.stat-card-label {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-graphite);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: var(--space-2);
}

/* ---- Actionable items ---- */

.actionable-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-graphite-faint);
}

.actionable-item:last-child {
  border-bottom: none;
}

.actionable-item-body {
  min-width: 0;
}

.actionable-item-title {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-1);
}

@media (max-width: 640px) {
  .actionable-item {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---- Bubble-mark bar chart ---- */

.bubble-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.bubble-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-graphite-faint);
}

.bubble-row:last-child {
  border-bottom: none;
}

.bubble-row-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  min-width: 150px;
  flex-shrink: 0;
}

.bubble-track {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.bubble {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.bubble.is-filled {
  background: var(--color-pencil-blue);
}

.bubble.is-empty {
  background: transparent;
  border: 1px solid var(--color-graphite);
}

.bubble-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-ink);
  margin-left: var(--space-2);
}

/* ---- Heatmap grid ---- */

.heatmap-wrap {
  overflow-x: auto;
}

.heatmap {
  display: grid;
  gap: var(--space-2);
  width: 100%;
}

.heatmap-corner {
  height: 48px;
}

.heatmap-col-header, .heatmap-row-header {
  font-family: var(--font-display);
  font-variant: small-caps;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-graphite);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 var(--space-1);
}

.heatmap-row-header {
  justify-content: flex-end;
  min-width: 90px;
}

.heatmap-cell {
  width: 100%;
  aspect-ratio: 1 / 1;
  min-width: 0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
}

.heatmap-cell--empty {
  background: transparent;
  border: 1px solid var(--color-graphite-faint);
  color: var(--color-graphite);
}

.heatmap-cell--low {
  background: rgba(var(--color-red-pen-rgb), 0.25);
  color: var(--color-ink);
}

.heatmap-cell--medium {
  background: rgba(var(--color-red-pen-rgb), 0.55);
  color: #fff;
}

.heatmap-cell--high {
  background: rgba(var(--color-red-pen-rgb), 0.85);
  color: #fff;
}

/* ---- App shell (sidebar layout) ---- */

.app-shell {
  display: flex;
  align-items: flex-start;
  gap: var(--space-8);
}

.sidebar {
  flex: 0 0 210px;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: sticky;
  top: var(--space-6);
}

.sidebar-learning-path-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  margin-bottom: var(--space-1);
}

.sidebar-nav,
.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-graphite-faint);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-graphite);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.sidebar-link:hover {
  color: var(--color-ink);
  background: rgba(var(--color-graphite-rgb), 0.08);
  text-decoration: none;
}

.sidebar-link.is-active {
  color: var(--color-pencil-blue);
  background: rgba(var(--color-pencil-blue-rgb), 0.1);
}

.sidebar-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.app-main {
  flex: 1 1 0;
  min-width: 0;
}

/* ---- Dashboard ---- */

.dashboard-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.dashboard-header h1 {
  margin: var(--space-1) 0 0;
}

.card--feature {
  border-top: 3px solid var(--color-red-pen);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
  margin-bottom: var(--space-6);
}

.dashboard-grid > .card + .card {
  margin-top: 0;
}

/* ---- Chart.js canvases ---- */

.chart-canvas-wrap {
  position: relative;
  height: 220px;
  margin-top: var(--space-4);
}

.chart-canvas-wrap--trend {
  height: 260px;
}

.btn-link {
  display: inline-block;
  margin-top: var(--space-3);
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-pencil-blue);
  cursor: pointer;
}

.btn-link:hover {
  text-decoration: underline;
}

/* ---- Impersonation banner ---- */

.impersonation-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-highlighter);
  color: var(--color-highlighter-ink);
  font-family: var(--font-display);
  font-size: 0.88rem;
}

.impersonation-banner form {
  margin: 0;
}

/* ---- Error-type donut ---- */

.donut-section {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.donut-chart {
  position: relative;
  width: 160px;
  height: 160px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.donut-chart-center {
  position: absolute;
  inset: 22%;
  background: var(--color-surface);
  border-radius: var(--radius-full);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.donut-chart-total {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1;
}

.donut-chart-total-label {
  font-family: var(--font-display);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  margin-top: 2px;
}

.donut-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1 1 200px;
  min-width: 0;
}

.donut-legend li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.donut-legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.donut-legend-label {
  font-family: var(--font-display);
  font-size: 0.88rem;
  flex: 1 1 auto;
  min-width: 0;
}

.donut-legend-value {
  font-weight: 600;
  color: var(--color-ink);
}

/* ---- Landing page ---- */

.hero {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  padding: var(--space-8) 0 var(--space-12);
}

.hero-copy {
  flex: 1 1 420px;
  min-width: 0;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-graphite);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-4) var(--space-1) var(--space-3);
  margin-bottom: var(--space-5);
}

.hero-eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: var(--radius-full);
  background: var(--color-highlighter);
  border: 1px solid var(--color-graphite);
}

.hero-headline {
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}

/* Highlighter swipe — full-height marker stroke on light paper; on dark
   surfaces a translucent yellow band muddies, so it drops to a thick underline. */
.hl-mark {
  --hl-h: 0.82em;
  --hl-y: 56%;
  color: inherit;
  background-color: transparent;
  background-image: linear-gradient(
    100deg,
    rgba(var(--color-highlighter-rgb), 0) 1%,
    rgba(var(--color-highlighter-rgb), 0.95) 3.5%,
    rgba(var(--color-highlighter-rgb), 0.8) 50%,
    rgba(var(--color-highlighter-rgb), 0.95) 96.5%,
    rgba(var(--color-highlighter-rgb), 0) 99%
  );
  background-repeat: no-repeat;
  background-size: 100% var(--hl-h);
  background-position: 0 var(--hl-y);
  padding: 0 0.08em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

[data-theme="dark"] .hl-mark,
.cta-band .hl-mark {
  --hl-h: 0.16em;
  --hl-y: 96%;
}

.hl-mark--animate {
  animation: hl-swipe 0.6s cubic-bezier(0.25, 1, 0.5, 1) 0.4s both;
}

@keyframes hl-swipe {
  from {
    background-size: 0% var(--hl-h);
  }

  to {
    background-size: 100% var(--hl-h);
  }
}

.hero-tagline {
  color: var(--color-graphite);
  font-size: 1.08rem;
  max-width: 52ch;
  margin-bottom: var(--space-6);
}

.btn-cta {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-paper);
  font-size: 0.95rem;
  padding: var(--space-3) var(--space-8);
}

.btn-cta:hover,
.btn-cta:focus-visible {
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--color-highlighter);
}

.btn-cta:active {
  transform: translate(0, 0);
  box-shadow: 1px 1px 0 var(--color-highlighter);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.hero-exam-strip {
  color: var(--color-graphite);
  font-size: 0.85rem;
  line-height: 2.1;
}

.hero-sample {
  flex: 1 1 340px;
  display: flex;
  justify-content: center;
}

.hero-sample-stack {
  position: relative;
  width: 100%;
  max-width: 380px;
  height: 380px;
}

.hero-sample-card {
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  transition: transform 0.3s ease;
}

.hero-sample-stack:hover .hero-sample-card {
  transform: rotate(0deg);
}

.hero-sample-card--heatmap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transform: rotate(-2deg);
  z-index: 3;
}

.hero-sample-card--donut {
  position: absolute;
  bottom: 8px;
  right: 0;
  width: 220px;
  transform: rotate(3deg);
  z-index: 2;
}

.hero-sample-card--trend {
  position: absolute;
  bottom: 60px;
  left: -12px;
  width: 190px;
  transform: rotate(-4deg);
  z-index: 1;
}

.hero-sample-sparkline {
  width: 100%;
  height: 70px;
  display: block;
}

.donut-section--compact {
  margin-top: var(--space-3);
  justify-content: center;
}

.hero-sample-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  margin: 0 0 var(--space-4);
}

.section-title {
  text-align: center;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-8);
}

.steps-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-highlighter-ink);
  background: var(--color-highlighter);
  border: 1.5px solid var(--color-highlighter-ink);
  border-radius: var(--radius-sm);
  transform: rotate(-3deg);
  margin-bottom: var(--space-3);
}

.step h3 {
  margin-bottom: var(--space-2);
}

.step p {
  color: var(--color-graphite);
  margin: 0;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--color-graphite-rgb), 0.45);
  box-shadow: var(--shadow-lift);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-icon--blue {
  background: rgba(var(--color-pencil-blue-rgb), 0.12);
  color: var(--color-pencil-blue);
}

.feature-icon--red {
  background: rgba(var(--color-red-pen-rgb), 0.12);
  color: var(--color-red-pen);
}

.feature-icon--green {
  background: rgba(var(--color-check-green-rgb), 0.12);
  color: var(--color-check-green);
}

.feature-card h3 {
  margin-bottom: var(--space-2);
}

.feature-card p {
  color: var(--color-graphite);
  margin: 0;
}

.cta-band {
  background: var(--color-nav-bg);
  color: var(--color-nav-text);
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  width: 100vw;
  padding: var(--space-12) max(var(--space-4), calc(50vw - 590px));
  margin-top: var(--space-12);
  box-sizing: border-box;
}

.cta-band-inner {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

.cta-band h2 {
  color: var(--color-nav-text);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
}

.cta-band p {
  color: var(--color-nav-text-muted);
  margin-bottom: var(--space-6);
}

.cta-band .btn-cta {
  background: var(--color-nav-active-bg);
  border-color: var(--color-nav-active-bg);
  color: var(--color-nav-active-text);
}

/* ---- Landing: stats strip ---- */

.landing-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-4);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-graphite-faint);
  border-bottom: 1px solid var(--color-graphite-faint);
  text-align: center;
}

.landing-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1;
}

.landing-stat-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  margin-top: var(--space-2);
}

/* ---- Landing: screenshots ---- */

.section-lede {
  text-align: center;
  color: var(--color-graphite);
  max-width: 52ch;
  margin: calc(var(--space-8) * -1 + var(--space-2)) auto var(--space-8);
}

.screenshot-browser {
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  background: var(--color-surface);
  max-width: 900px;
  margin: 0 auto var(--space-6);
}

.screenshot-browser-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-graphite-faint);
  background: rgba(var(--color-graphite-rgb), 0.04);
}

.screenshot-browser-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-graphite-faint);
}

.screenshot-browser-url {
  margin-left: var(--space-2);
  font-size: 0.76rem;
  color: var(--color-graphite);
}

.screenshot-browser img {
  display: block;
  width: 100%;
  height: auto;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  align-items: start;
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

.screenshot-card {
  margin: 0;
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  background: var(--color-surface);
}

.screenshot-card img {
  display: block;
  width: 100%;
  height: auto;
}

.screenshot-card figcaption {
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-graphite);
}

/* ---- Landing: vocab teaser ---- */

.vocab-teaser {
  display: flex;
  align-items: center;
  gap: var(--space-8) var(--space-12);
  flex-wrap: wrap;
}

.vocab-teaser-copy {
  flex: 1 1 300px;
  min-width: 0;
}

.vocab-teaser-copy h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

.vocab-teaser-copy p {
  color: var(--color-graphite);
  max-width: 44ch;
  margin: 0 0 var(--space-5);
}

.vocab-teaser-demo {
  flex: 1 1 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.vocab-teaser-demo .vocab-card-scene {
  max-width: 420px;
}

/* ---- Landing: scroll-triggered reveals ----
   Gated on html.js-reveal (set by landing.js) so content never hides without JS. */

html.js-reveal .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: calc(var(--reveal-i, 0) * 70ms);
}

html.js-reveal .reveal.is-revealed {
  opacity: 1;
  transform: none;
}

/* ---- Landing: sticky mobile CTA ---- */

.landing-sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: none;
  padding: var(--space-3) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom));
  background: var(--color-surface);
  border-top: 1px solid var(--color-graphite-faint);
  transform: translateY(102%);
  transition: transform 0.25s ease;
}

.landing-sticky-cta.is-visible {
  transform: none;
}

.landing-sticky-cta .btn {
  flex: 1;
  justify-content: center;
}

@media (max-width: 640px) {
  .landing-sticky-cta {
    display: flex;
    gap: var(--space-3);
  }
}

/* ---- Empty states ---- */

.empty-state {
  text-align: center;
  color: var(--color-graphite);
  font-style: italic;
  padding: var(--space-6) var(--space-4);
  margin: 0;
}

/* ---- Utilities ---- */

.mono {
  font-family: var(--font-mono);
}

pre {
  overflow-x: auto;
  max-width: 100%;
}

/* ---- Site footer ---- */

.site-footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-graphite-faint);
}

.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
}

.site-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-ink);
}

.site-footer-brand:hover {
  color: var(--color-ink);
  text-decoration: none;
}

.site-footer-logo {
  display: block;
  opacity: 0.85;
}

.site-footer-links {
  display: flex;
  gap: var(--space-2) var(--space-5);
  flex-wrap: wrap;
}

.site-footer-links a {
  color: var(--color-graphite);
  font-size: 0.86rem;
}

.site-footer-links a:hover {
  color: var(--color-ink);
}

.site-footer-copy {
  width: 100%;
  color: var(--color-graphite);
  font-size: 0.78rem;
  margin: 0;
}

/* ---- Error pages ---- */

.error-page {
  text-align: center;
  max-width: 480px;
  margin: var(--space-12) auto;
}

.error-code {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-graphite);
  margin: 0 0 var(--space-2);
}

.error-message {
  color: var(--color-graphite);
  margin-bottom: var(--space-6);
}

.error-actions {
  display: flex;
  justify-content: center;
}

/* ---- Legal pages (Terms, Privacy) ---- */

.legal-page {
  max-width: 720px;
  margin: 0 auto;
}

.legal-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-graphite);
  margin-bottom: var(--space-8);
}

.legal-intro {
  color: var(--color-graphite);
  font-size: 1.02rem;
  margin-bottom: var(--space-8);
}

.legal-page h2 {
  margin-top: var(--space-8);
}

.legal-page section:first-of-type h2 {
  margin-top: 0;
}

.legal-page p {
  color: var(--color-graphite);
  margin: 0 0 var(--space-4);
}

.legal-page ul,
.legal-page ol {
  color: var(--color-graphite);
  margin: 0 0 var(--space-4);
  padding-left: 1.3em;
}

.legal-page li {
  margin-bottom: var(--space-2);
}

.legal-page li:last-child {
  margin-bottom: 0;
}

.legal-page strong {
  color: var(--color-ink);
}

/* ---- About page ---- */

.about-hero {
  text-align: center;
  max-width: 640px;
  margin: var(--space-6) auto var(--space-4);
}

.about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-pencil-blue);
  margin-bottom: var(--space-4);
}

.about-hero h1 {
  font-size: 2rem;
  line-height: 1.15;
}

.about-hero p {
  color: var(--color-graphite);
  font-size: 1.05rem;
}

.about-story {
  max-width: 640px;
  margin: 0 auto;
}

.about-story p {
  color: var(--color-graphite);
  margin-bottom: var(--space-4);
}

.about-story p:last-child {
  margin-bottom: 0;
}

.value-strip {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin: var(--space-6) 0;
}

/* ---- Responsive ---- */

@media (max-width: 640px) {
  .topnav {
    flex-direction: column;
    align-items: stretch;
    border-radius: var(--radius-md);
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .topnav-brand {
    text-align: center;
  }

  .topnav-links {
    justify-content: center;
  }

  .card {
    padding: var(--space-4);
  }

  .stat-row {
    flex-direction: column;
  }

  .bubble-row-label {
    min-width: 100%;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .app-shell {
    flex-direction: column;
    gap: var(--space-4);
  }

  .sidebar {
    position: static;
    width: 100%;
  }

  .sidebar-nav,
  .sidebar-footer {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-footer {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
  }

  .dashboard-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    flex-direction: column;
    text-align: center;
  }

  .site-footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .hero-sample-stack {
    position: static;
    width: 100%;
    max-width: 320px;
    height: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .hero-sample-card--heatmap,
  .hero-sample-card--donut,
  .hero-sample-card--trend {
    position: static;
    width: 100%;
    transform: none;
  }

  .hero-sample-stack:hover .hero-sample-card {
    transform: none;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-tagline {
    max-width: none;
  }

  .steps-grid,
  .feature-grid,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .app-shell {
    flex-direction: column;
    align-items: stretch;
  }

  .sidebar {
    position: static;
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
  }

  .sidebar-nav,
  .sidebar-footer {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-footer {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
  }

  .dashboard-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---- Vocabulary tool ---- */

.vocab-tool {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.vocab-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.vocab-header h1 {
  margin: var(--space-2) 0 var(--space-1);
}

.vocab-subtitle {
  color: var(--color-graphite);
  font-size: 0.92rem;
  margin: 0;
}

.vocab-mode-tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
  padding: var(--space-1);
}

.vocab-mode-tab {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-graphite);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
  cursor: pointer;
}

.vocab-mode-tab:hover {
  color: var(--color-ink);
  text-decoration: none;
}

.vocab-mode-tab[aria-selected="true"],
.vocab-mode-tab[aria-current="page"] {
  background: var(--color-pencil-blue);
  color: #fff;
}

.vocab-loading-state,
.vocab-error-state {
  color: var(--color-graphite);
  text-align: center;
  padding: var(--space-8) 0;
}

.vocab-error-state {
  color: var(--color-red-pen);
}

.vocab-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

/* Size picker */

.vocab-size-picker {
  display: flex;
  gap: var(--space-2);
}

.vocab-size-option {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
  width: 44px;
  height: 34px;
  cursor: pointer;
}

.vocab-size-option:hover {
  background: rgba(var(--color-graphite-rgb), 0.1);
}

.vocab-size-option[aria-pressed="true"] {
  background: var(--color-pencil-blue);
  border-color: var(--color-pencil-blue);
  color: #fff;
}

/* Flashcard */

.vocab-card-scene {
  width: 100%;
  max-width: 480px;
  perspective: 1200px;
}

.vocab-flashcard {
  display: block;
  width: 100%;
  min-height: 260px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.vocab-flashcard-inner {
  position: relative;
  display: block;
  width: 100%;
  min-height: 260px;
  transform-style: preserve-3d;
  transition: transform 0.4s ease;
}

.vocab-flashcard.is-flipped .vocab-flashcard-inner {
  transform: rotateY(180deg);
}

.vocab-flashcard-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  backface-visibility: hidden;
}

.vocab-flashcard-face--back {
  transform: rotateY(180deg);
}

.vocab-flashcard-pos {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
}

.vocab-flashcard-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.8rem;
  color: var(--color-ink);
}

.vocab-flashcard-hint {
  font-size: 0.8rem;
  color: var(--color-graphite);
}

.vocab-flashcard-definition {
  font-size: 1.1rem;
  color: var(--color-ink);
}

.vocab-flashcard-example {
  font-style: italic;
  color: var(--color-graphite);
}

.vocab-deck-controls {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.vocab-deck-progress {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-graphite);
}

/* Test mode */

.vocab-test-header {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.vocab-test-progress {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-graphite);
}

.vocab-scantron-track {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.vocab-scantron-track span {
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-graphite-faint);
  background: transparent;
}

.vocab-scantron-track span.is-answered {
  background: var(--color-pencil-blue);
  border-color: var(--color-pencil-blue);
}

.vocab-scantron-track span.is-current {
  border-color: var(--color-pencil-blue);
}

.vocab-test-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.8rem;
  color: var(--color-ink);
  margin: 0;
}

.vocab-test-instruction {
  color: var(--color-graphite);
  margin: calc(var(--space-4) * -1) 0 0;
}

.vocab-bubble-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 560px;
}

.vocab-bubble-option {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-align: left;
  font-family: var(--font-body);
  font-size: 0.98rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
}

.vocab-bubble-option:hover:not(:disabled) {
  border-color: var(--color-pencil-blue);
}

.vocab-bubble-option:disabled {
  cursor: default;
}

.vocab-bubble-option-mark {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-graphite-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-graphite);
}

.vocab-bubble-option.is-correct {
  border-color: var(--color-check-green);
  background: rgba(var(--color-check-green-rgb), 0.08);
}

.vocab-bubble-option.is-correct .vocab-bubble-option-mark {
  border-color: var(--color-check-green);
  color: var(--color-check-green);
}

.vocab-bubble-option.is-incorrect {
  border-color: var(--color-red-pen);
  background: rgba(var(--color-red-pen-rgb), 0.08);
}

.vocab-bubble-option.is-incorrect .vocab-bubble-option-mark {
  border-color: var(--color-red-pen);
  color: var(--color-red-pen);
}

/* Summary */

.vocab-score-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-8);
  box-shadow: var(--shadow-card);
}

.vocab-score-card-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
}

.vocab-score-card-score {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 2.2rem;
  color: var(--color-ink);
}

.vocab-corrections {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 560px;
}

.vocab-corrections-empty {
  text-align: center;
  color: var(--color-graphite);
}

.vocab-correction {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.vocab-correction-word {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-ink);
}

.vocab-correction-chosen {
  color: var(--color-red-pen);
  font-size: 0.92rem;
}

.vocab-correction-chosen::before {
  content: "You chose: ";
  color: var(--color-graphite);
}

.vocab-correction-correct {
  color: var(--color-check-green);
  font-size: 0.92rem;
}

.vocab-correction-correct::before {
  content: "Correct: ";
  color: var(--color-graphite);
}

.vocab-summary-actions {
  display: flex;
  gap: var(--space-3);
}

/* Stats page */

.vocab-stat-tiles {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
  width: 100%;
}

@media (max-width: 900px) {
  .vocab-stat-tiles {
    grid-template-columns: repeat(2, 1fr);
  }
}

.vocab-stat-tile {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  text-align: center;
}

.vocab-stat-tile-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-ink);
}

.vocab-stat-tile-label {
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--color-graphite);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.vocab-length-stats,
.vocab-hardest-words {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
}

.vocab-length-legend {
  display: flex;
  gap: var(--space-5);
  margin-bottom: var(--space-4);
}

.vocab-length-legend-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-graphite);
}

.vocab-length-legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-sm);
}

.vocab-length-legend-swatch--avg {
  background: var(--color-pencil-blue);
}

.vocab-length-legend-swatch--best {
  background: var(--color-check-green);
}

.vocab-bar-cell-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 160px;
}

.vocab-bar-track {
  flex: 1;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(var(--color-graphite-rgb), 0.15);
  overflow: hidden;
}

.vocab-bar {
  height: 100%;
  border-radius: var(--radius-full);
}

.vocab-bar--avg {
  background: var(--color-pencil-blue);
}

.vocab-bar--best {
  background: var(--color-check-green);
}

.vocab-bar-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-graphite);
  min-width: 42px;
}

.vocab-hardest-words {
  margin-top: var(--space-6);
}

.vocab-hardest-words .card-header {
  margin-bottom: var(--space-4);
}

/* ---- Cross-document view transitions ---- */

@view-transition {
  navigation: auto;
}

@media (prefers-reduced-motion: reduce) {
  @view-transition {
    navigation: none;
  }
}

/* ---- Progressive-enhancement helpers ---- */

/* JS-dependent surfaces (the answer sheet, quick-log triggers' modal
   behavior) stay hidden until the head script stamps html.js. */
.js-only {
  display: none;
}

html.js .js-only {
  display: block;
}

[x-cloak] {
  display: none !important;
}

.kbd {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  line-height: 1;
  padding: 3px 5px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-graphite-faint);
  background: rgba(var(--color-graphite-rgb), 0.08);
  color: inherit;
  margin-left: var(--space-1);
}

.btn-primary .kbd {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-graphite);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-icon:hover {
  background: rgba(var(--color-red-pen-rgb), 0.1);
  color: var(--color-red-pen);
}

.btn-icon svg {
  width: 15px;
  height: 15px;
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* ---- Learning path manage screen ---- */

.card--danger {
  border-color: rgba(var(--color-red-pen-rgb), 0.3);
  background: rgba(var(--color-red-pen-rgb), 0.03);
  margin-top: var(--space-6);
}

.card--danger h2 {
  color: var(--color-red-pen);
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.subject-card {
  background: rgba(var(--color-graphite-rgb), 0.04);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.subject-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.subject-card-header h3 {
  margin: 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.summary-grid .card {
  margin-top: 0;
}

.summary-tile {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (max-width: 640px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}

.pill-error {
  color: var(--color-red-pen);
  background: rgba(var(--color-red-pen-rgb), 0.08);
  border-color: rgba(var(--color-red-pen-rgb), 0.25);
  text-transform: none;
  letter-spacing: 0;
}

/* ---- Sidebar quick-log ---- */

.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.sidebar-quicklog {
  width: 100%;
  justify-content: center;
}

/* ---- Segmented control (subject/module pickers) ---- */

.seg {
  display: inline-flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: rgba(var(--color-graphite-rgb), 0.08);
  border: 1px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
}

.seg-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--color-graphite);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-4);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.seg-btn:hover {
  color: var(--color-ink);
}

.seg-btn.is-active {
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

/* ---- Choice chips (quick-log durations/dates, radio- or button-backed) ---- */

.chip-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.84rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1.5px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-4);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.chip input[type="radio"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  margin: 0;
  cursor: pointer;
}

.chip:hover {
  border-color: var(--color-graphite);
}

.chip:has(input:checked),
.chip.is-active {
  border-color: var(--color-pencil-blue);
  background: rgba(var(--color-pencil-blue-rgb), 0.1);
  color: var(--color-pencil-blue);
}

.chip:has(input:focus-visible) {
  box-shadow: 0 0 0 3px rgba(var(--color-pencil-blue-rgb), 0.15);
}

.chip:has(input:disabled) {
  opacity: 0.45;
}

.chip--btn {
  background: var(--color-surface);
  border: 1.5px solid var(--color-graphite-faint);
}

/* ---- Answer sheet (assessment mistake rapid entry) ---- */

.qsheet-context {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.qsheet-rows {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.qsheet-rows .card-meta {
  margin: 0;
}

.qsheet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: var(--space-2);
}

.qsheet-bubble {
  aspect-ratio: 1 / 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-graphite);
  background: transparent;
  border: 1.5px solid var(--color-graphite-faint);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease,
    transform 0.15s ease;
}

.qsheet-bubble:hover {
  border-color: var(--color-graphite);
  transform: scale(1.08);
}

.qsheet-bubble.is-pending {
  border-color: var(--color-pencil-blue);
  background: rgba(var(--color-pencil-blue-rgb), 0.12);
  color: var(--color-pencil-blue);
}

.qsheet-bubble.is-missed {
  border-color: var(--color-red-pen);
  background: var(--color-red-pen);
  color: #fff;
}

.qsheet-panel {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1.5px dashed rgba(var(--color-pencil-blue-rgb), 0.45);
  border-radius: var(--radius-md);
  background: rgba(var(--color-pencil-blue-rgb), 0.04);
}

.qsheet-panel-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1 1 150px;
  min-width: 0;
}

.qsheet-panel-field--q {
  flex: 0 0 72px;
}

.qsheet-panel-field--notes {
  flex: 2 1 200px;
}

.qsheet-panel-actions {
  display: flex;
  gap: var(--space-2);
  flex: 0 0 auto;
}

.qsheet-errors:not(:empty) {
  margin-top: var(--space-3);
}

tr.is-flash td {
  animation: row-flash 1.2s ease;
}

@keyframes row-flash {
  0%, 60% {
    background: rgba(var(--color-red-pen-rgb), 0.12);
  }
  100% {
    background: transparent;
  }
}

.manual-entry {
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-graphite-faint);
  padding-top: var(--space-4);
}

.manual-entry summary {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.84rem;
  color: var(--color-graphite);
  cursor: pointer;
}

.manual-entry[open] summary {
  margin-bottom: var(--space-5);
}

/* ---- Quick-log dialog ---- */

.quicklog {
  border: none;
  padding: 0;
  margin: 0 0 0 auto;
  height: 100dvh;
  max-height: 100dvh;
  width: min(430px, 92vw);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-lift);
}

.quicklog::backdrop {
  background: rgba(25, 27, 30, 0.45);
}

.quicklog[open] {
  animation: quicklog-in 0.22s ease;
}

@keyframes quicklog-in {
  from {
    transform: translateX(40px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.quicklog-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.quicklog-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.quicklog-head h2 {
  margin: 0;
}

.quicklog-head .card-meta {
  margin-bottom: 0;
}

.quicklog-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.quicklog-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.quicklog-optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.7;
}

.quicklog-custom {
  width: 84px;
  flex: 0 0 auto;
}

.quicklog-date {
  width: 150px;
  flex: 0 0 auto;
}

.quicklog-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.quicklog-loading {
  color: var(--color-graphite);
  text-align: center;
  padding: var(--space-8) 0;
}

/* ---- Toasts ---- */

.toast-region {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  z-index: 100;
}

.toast {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-surface);
  background: var(--color-ink);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
  box-shadow: var(--shadow-lift);
  animation: toast-in 0.2s ease;
}

.toast svg {
  width: 16px;
  height: 16px;
  color: var(--color-check-green);
}

.toast.is-leaving {
  transition: opacity 0.4s ease, transform 0.4s ease;
  opacity: 0;
  transform: translateY(8px);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Dashboard: week delta, activity feed, streak calendar ---- */

.stat-card-delta {
  display: block;
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--color-graphite);
  margin-top: var(--space-1);
}

.stat-card-delta.is-up {
  color: var(--color-check-green);
}

.stat-card-delta.is-down {
  color: var(--color-red-pen);
}

.activity-feed {
  list-style: none;
  margin: 0;
  padding: 0;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-graphite-faint);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-icon {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-icon svg {
  width: 15px;
  height: 15px;
}

.activity-icon--blue {
  background: rgba(var(--color-pencil-blue-rgb), 0.12);
  color: var(--color-pencil-blue);
}

.activity-icon--green {
  background: rgba(var(--color-check-green-rgb), 0.12);
  color: var(--color-check-green);
}

.activity-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.activity-body a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-ink);
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.activity-body a:hover {
  color: var(--color-pencil-blue);
}

.activity-meta {
  font-size: 0.78rem;
  color: var(--color-graphite);
}

.activity-figures {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  flex-shrink: 0;
  font-size: 0.85rem;
}

.activity-mistakes {
  color: var(--color-red-pen);
}

.activity-date {
  font-size: 0.74rem;
  color: var(--color-graphite);
}

.streak-cal-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: var(--space-1);
}

.streak-cal-days {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 20px; /* clears the month-label row so rows line up */
  font-family: var(--font-mono);
  font-size: 0.6rem;
  line-height: 10px;
  color: var(--color-graphite);
  flex-shrink: 0;
}

.streak-cal-days span {
  height: 10px;
  text-align: center;
}

.streak-cal-grid {
  display: flex;
  flex-direction: column;
}

.streak-cal-months {
  display: grid;
  gap: 3px;
  height: 15px;
  margin: 0 0 3px 2px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-graphite);
}

.streak-cal-months span {
  grid-row: 1;
  white-space: nowrap;
}

.streak-cal {
  display: flex;
  gap: 3px;
  padding: 2px;
}

.streak-week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.streak-week.is-current-week {
  border-radius: var(--radius-sm);
  box-shadow: 0 0 0 2px rgba(var(--color-pencil-blue-rgb), 0.3);
}

.streak-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-graphite-faint);
  background: transparent;
  flex-shrink: 0;
}

.streak-dot.is-level-1 {
  border-color: transparent;
  background: rgba(var(--color-check-green-rgb), 0.3);
}

.streak-dot.is-level-2 {
  border-color: transparent;
  background: rgba(var(--color-check-green-rgb), 0.55);
}

.streak-dot.is-level-3 {
  border-color: transparent;
  background: rgba(var(--color-check-green-rgb), 0.8);
}

.streak-dot.is-level-4 {
  border-color: transparent;
  background: var(--color-check-green);
}

.streak-cal-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: var(--space-4) 0 0;
  font-size: 0.78rem;
  color: var(--color-graphite);
}

/* ---- Dashboard: test countdown, focus list, weekday rhythm ---- */

.dashboard-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
}

.countdown-value {
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--color-pencil-blue);
}

.countdown.is-close .countdown-value {
  color: var(--color-red-pen);
}

.countdown-label {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-graphite);
  margin-top: var(--space-1);
}

.focus-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.focus-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-graphite-faint);
}

.focus-item:last-child {
  border-bottom: none;
}

.focus-rank {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-graphite-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: var(--color-graphite);
  flex-shrink: 0;
}

.focus-item:first-child .focus-rank {
  background: var(--color-red-pen);
  border-color: var(--color-red-pen);
  color: #fff;
}

.focus-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.focus-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.focus-meta {
  font-size: 0.78rem;
  color: var(--color-graphite);
}

.focus-flag {
  color: var(--color-red-pen);
  font-weight: 600;
}

.focus-track {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.focus-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-graphite-faint);
}

.focus-dot.is-filled {
  border-color: transparent;
  background: rgba(var(--color-red-pen-rgb), 0.75);
}

.rhythm {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.rhythm-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.rhythm-value {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-graphite);
  height: 1em;
}

.rhythm-bar-track {
  display: flex;
  align-items: flex-end;
  width: 100%;
  max-width: 34px;
  height: 110px;
  background: rgba(var(--color-graphite-rgb), 0.08);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.rhythm-bar {
  width: 100%;
  background: rgba(var(--color-pencil-blue-rgb), 0.45);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.rhythm-bar.is-peak {
  background: var(--color-pencil-blue);
}

.rhythm-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-graphite);
}

@media (max-width: 900px) {
  .dashboard-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .dashboard-header-actions {
    width: 100%;
    justify-content: space-between;
  }
}