:root {
  color-scheme: light;
  --ink: #18211d;
  --muted: #60706a;
  --paper: #fffdf6;
  --panel: #ffffff;
  --line: #dce7de;
  --line-strong: #b9d2c4;
  --green: #1c7c54;
  --green-dark: #125c42;
  --green-soft: #e7f5ed;
  --gold: #d9a132;
  --gold-soft: #fff2c5;
  --sky: #4f86b3;
  --sky-soft: #e7f1f8;
  --rose: #bb4b56;
  --shadow: 0 18px 52px rgba(26, 42, 34, 0.12);
  --arabic-font: "Traditional Arabic", "Amiri", "Scheherazade New", "Noto Naskh Arabic", serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ink: #eef6f1;
    --muted: #afbeb7;
    --paper: #111814;
    --panel: #17211c;
    --line: #2b4035;
    --line-strong: #446653;
    --green: #42b981;
    --green-dark: #8adcb4;
    --green-soft: #173125;
    --gold: #e7bd59;
    --gold-soft: #3a2c12;
    --sky: #79acd2;
    --sky-soft: #172b39;
    --rose: #ef7f88;
    --shadow: 0 18px 52px rgba(0, 0, 0, 0.28);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ink: #eef6f1;
  --muted: #afbeb7;
  --paper: #111814;
  --panel: #17211c;
  --line: #2b4035;
  --line-strong: #446653;
  --green: #42b981;
  --green-dark: #8adcb4;
  --green-soft: #173125;
  --gold: #e7bd59;
  --gold-soft: #3a2c12;
  --sky: #79acd2;
  --sky-soft: #172b39;
  --rose: #ef7f88;
  --shadow: 0 18px 52px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--gold-soft) 34%, transparent), transparent 34rem),
    linear-gradient(180deg, var(--paper), color-mix(in srgb, var(--sky-soft) 34%, var(--paper)));
  color: var(--ink);
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

button,
a {
  font: inherit;
}

button {
  touch-action: manipulation;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--gold) 70%, white);
  outline-offset: 3px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
}

h1,
h2,
p {
  margin: 0;
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  border: 0;
  background: rgba(15, 22, 18, 0.38);
}

.app-shell {
  display: grid;
  grid-template-columns: 312px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 88%, var(--paper));
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark,
.spark {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  font-family: var(--arabic-font);
  font-weight: 900;
  line-height: 1;
}

.brand-mark {
  width: 58px;
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
  font-size: 36px;
  box-shadow: 0 12px 26px rgba(28, 124, 84, 0.22);
}

.brand h1 {
  font-size: 24px;
  line-height: 1.05;
}

.brand p,
.label,
.eyebrow,
.lesson-button small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.drawer-close {
  display: none;
  margin-left: auto;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}

.profile {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.profile > div,
.next-box,
.install-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
}

.profile > div,
.next-box {
  padding: 14px;
}

.profile strong {
  display: block;
  margin-top: 6px;
  font-size: 28px;
}

.next-box {
  display: grid;
  gap: 6px;
}

.next-box p,
.install-box p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.35;
}

.nav-section {
  display: grid;
  gap: 10px;
  min-height: 0;
}

.nav-section h2 {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.lesson-list {
  display: grid;
  gap: 8px;
  overflow: auto;
  padding-right: 2px;
}

.lesson-button {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 62px;
  padding: 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.lesson-button small {
  grid-column: 2 / -1;
  margin-top: -6px;
}

.lesson-button:hover,
.lesson-button.is-active {
  border-color: var(--line-strong);
  background: var(--panel);
}

.lesson-button.is-complete .lesson-number {
  background: var(--green);
  color: #ffffff;
}

.lesson-button.is-far {
  opacity: 0.62;
}

.lesson-number {
  display: grid;
  place-items: center;
  min-width: 38px;
  min-height: 38px;
  padding: 0 5px;
  border-radius: 8px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
}

.install-box {
  display: grid;
  gap: 9px;
  margin-top: auto;
  padding: 14px;
}

.install-button,
.kid-toggle,
.theme-toggle,
.mode-tab,
.primary-button,
.ghost-button,
.clear-button,
.mark-lesson-button {
  min-height: 44px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 850;
}

.install-button {
  width: 100%;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.workbench {
  min-width: 0;
  padding: 28px clamp(18px, 3vw, 42px) 42px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.title-block {
  min-width: 0;
}

.topbar h2 {
  margin-top: 5px;
  max-width: 920px;
  font-size: clamp(32px, 4.2vw, 62px);
  line-height: 1;
  letter-spacing: 0;
}

#lessonGoal {
  max-width: 800px;
  margin-top: 8px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.35;
}

.lesson-toggle {
  display: none;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--green-dark);
  cursor: pointer;
  font-weight: 900;
}

.top-actions {
  display: grid;
  justify-items: end;
  gap: 10px;
}

.top-action-row {
  display: flex;
  gap: 8px;
}

.kid-toggle,
.theme-toggle {
  padding: 0 13px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
}

.kid-toggle[aria-pressed="true"] {
  border-color: var(--gold);
  background: var(--gold-soft);
}

.mode-tabs {
  display: flex;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
}

.mode-tab {
  min-width: 78px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
}

.mode-tab.is-active {
  background: var(--ink);
  color: var(--paper);
}

.lesson-stage {
  display: grid;
  gap: 18px;
}

.hero-card,
.student-card,
.recording-panel,
.quiz-box,
.trace-layout {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
}

.hero-card {
  display: grid;
  grid-template-columns: 94px minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  padding: 20px;
}

.spark {
  width: 92px;
  border-radius: 8px;
  background: var(--gold-soft);
  color: color-mix(in srgb, var(--gold) 64%, var(--ink));
  font-size: 58px;
}

#sessionStatus {
  font-size: 18px;
  line-height: 1.35;
}

.progress-track {
  height: 12px;
  margin-top: 18px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--line) 58%, transparent);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--gold));
  transition: width 180ms ease;
}

.audio-notice,
.celebration {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.35;
}

.audio-notice {
  border: 1px solid color-mix(in srgb, var(--gold) 58%, var(--line));
  background: var(--gold-soft);
  color: color-mix(in srgb, var(--ink) 80%, var(--gold));
}

.audio-notice[data-tone="bad"] {
  border-color: color-mix(in srgb, var(--rose) 60%, var(--line));
  background: color-mix(in srgb, var(--rose) 12%, var(--panel));
}

.celebration {
  border: 1px solid color-mix(in srgb, var(--green) 42%, var(--line));
  background: var(--green-soft);
  color: var(--green-dark);
}

.panel {
  display: none;
}

.panel.is-visible {
  display: block;
}

.student-card {
  display: grid;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 28px);
}

.student-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-weight: 800;
}

.big-arabic-button {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: clamp(260px, 46vw, 520px);
  padding: 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 84%, var(--sky-soft)), var(--panel));
  color: var(--ink);
  cursor: pointer;
  direction: rtl;
  font-family: var(--arabic-font);
  font-size: clamp(8rem, 25vw, 19rem);
  font-weight: 900;
  line-height: 1.18;
  text-align: center;
  unicode-bidi: isolate;
}

.big-arabic-button:hover {
  border-color: var(--green);
}

.student-hint {
  min-height: 28px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.4;
  text-align: center;
}

.student-actions,
.record-actions,
.quiz-actions,
.lesson-actions,
.teacher-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

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

.recording-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  margin-top: 12px;
  padding: 16px;
}

#recordingStatus {
  margin-top: 5px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.35;
}

.primary-button,
.ghost-button,
.clear-button,
.mark-lesson-button {
  padding: 0 16px;
}

.primary-button,
.mark-lesson-button {
  border: 1px solid var(--green);
  background: var(--green);
  color: #ffffff;
}

.ghost-button,
.clear-button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
}

.ghost-button.danger {
  border-color: color-mix(in srgb, var(--rose) 42%, var(--line));
  color: var(--rose);
}

.primary-button:hover,
.ghost-button:hover,
.clear-button:hover,
.mark-lesson-button:hover,
.install-button:hover,
.kid-toggle:hover,
.theme-toggle:hover {
  filter: brightness(0.98);
}

.teacher-toolbar {
  justify-content: center;
  padding: 12px 0;
}

.teacher-toolbar strong {
  min-width: 118px;
  text-align: center;
}

.teacher-line {
  display: grid;
  grid-template-columns: repeat(7, minmax(68px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.teacher-page {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 80%, var(--paper));
}

.teacher-row {
  display: grid;
  grid-template-columns: repeat(7, minmax(54px, 1fr));
  gap: 8px;
  padding: 8px;
  border: 1px solid transparent;
  border-radius: 8px;
}

.teacher-row.is-current {
  border-color: var(--gold);
  background: color-mix(in srgb, var(--gold-soft) 60%, transparent);
}

.teacher-item {
  min-width: 0;
  min-height: 72px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  direction: rtl;
  font-family: var(--arabic-font);
  font-size: clamp(2.5rem, 6vw, 5.4rem);
  font-weight: 900;
  line-height: 1.12;
  text-align: center;
  unicode-bidi: isolate;
}

.teacher-page .teacher-item {
  min-height: 56px;
  font-size: clamp(2rem, 4vw, 4rem);
}

.teacher-item.is-active {
  border-color: var(--green);
  background: var(--green-soft);
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--green) 48%, transparent);
}

.teacher-item.is-complete::after {
  content: "";
  display: block;
  width: 28px;
  height: 4px;
  margin: 2px auto 0;
  border-radius: 999px;
  background: var(--green);
}

.quiz-box {
  display: grid;
  gap: 20px;
  padding: 24px;
}

.quiz-prompt {
  display: grid;
  justify-items: center;
  gap: 10px;
}

.quiz-sound-button {
  min-height: 74px;
  padding: 0 24px;
  border: 1px solid var(--green);
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
  cursor: pointer;
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 900;
}

.choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  direction: rtl;
}

.choice {
  min-height: 74px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  direction: rtl;
  font-family: var(--arabic-font);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  text-align: center;
  unicode-bidi: isolate;
}

.choice:hover {
  border-color: var(--green);
}

.feedback {
  min-height: 30px;
  color: var(--green-dark);
  font-size: 19px;
  font-weight: 900;
  text-align: center;
}

.feedback.is-miss {
  color: var(--rose);
}

.quiz-actions,
.lesson-actions {
  justify-content: center;
}

.lesson-actions-bottom {
  padding-top: 6px;
}

.trace-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 560px;
  overflow: hidden;
}

.trace-target {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 16px;
  padding: 24px;
  background: color-mix(in srgb, var(--green-soft) 44%, var(--panel));
}

.trace-target strong {
  direction: rtl;
  font-family: var(--arabic-font);
  font-size: 132px;
  line-height: 1;
  unicode-bidi: isolate;
}

.trace-board {
  position: relative;
  min-height: 520px;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 520px;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--green) 11%, transparent) 1px, transparent 1px),
    linear-gradient(color-mix(in srgb, var(--green) 11%, transparent) 1px, transparent 1px),
    var(--panel);
  background-size: 42px 42px;
  touch-action: none;
}

.clear-button {
  position: absolute;
  right: 16px;
  bottom: 16px;
}

body.kid-mode .recording-panel,
body.kid-mode #studentSlow {
  display: none;
}

body.kid-mode .big-arabic-button {
  min-height: min(68vh, 620px);
  font-size: clamp(10rem, 32vw, 23rem);
}

body.kid-mode .student-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

body.kid-mode .student-actions .mark-lesson-button {
  grid-column: 1 / -1;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 40;
    width: min(88vw, 384px);
    overflow-y: auto;
    box-shadow: 22px 0 70px rgba(15, 22, 18, 0.25);
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  body.nav-open .sidebar {
    transform: translateX(0);
  }

  body.nav-open .nav-backdrop {
    display: block;
  }

  .drawer-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .workbench {
    padding: 18px;
  }

  .topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    margin: -18px -18px 18px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
    background: color-mix(in srgb, var(--paper) 92%, transparent);
    backdrop-filter: blur(16px);
  }

  .top-actions {
    justify-items: stretch;
  }

  .top-action-row,
  .mode-tabs {
    width: 100%;
  }

  .kid-toggle,
  .theme-toggle,
  .mode-tab {
    flex: 1;
  }

  .mode-tabs {
    overflow-x: auto;
  }

  .lesson-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
  }

  .hero-card {
    grid-template-columns: 72px minmax(0, 1fr);
  }

  .spark {
    width: 72px;
    font-size: 44px;
  }

  .teacher-line,
  .teacher-row {
    grid-template-columns: repeat(7, minmax(44px, 1fr));
    gap: 6px;
  }

  .teacher-item {
    min-height: 62px;
    font-size: clamp(2.3rem, 8vw, 4.6rem);
  }

  .teacher-page .teacher-item {
    min-height: 48px;
    font-size: clamp(1.8rem, 6vw, 3.8rem);
  }
}

@media (max-width: 620px) {
  .brand-mark {
    width: 50px;
    font-size: 31px;
  }

  .profile,
  .choices,
  .trace-layout {
    grid-template-columns: 1fr;
  }

  .topbar h2 {
    font-size: clamp(28px, 9vw, 40px);
  }

  .hero-card {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .spark {
    width: 66px;
  }

  .student-meta,
  .recording-panel {
    grid-template-columns: 1fr;
  }

  .student-meta {
    display: grid;
    gap: 4px;
  }

  .big-arabic-button {
    min-height: 320px;
    font-size: clamp(7rem, 34vw, 13rem);
  }

  .student-actions,
  .record-actions,
  .lesson-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .student-actions .mark-lesson-button,
  .lesson-actions .mark-lesson-button {
    grid-column: 1 / -1;
  }

  .teacher-toolbar {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .teacher-toolbar strong {
    grid-column: 1 / -1;
    min-width: 0;
    order: -1;
  }

  .teacher-line,
  .teacher-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .teacher-page {
    padding: 10px;
  }

  .teacher-item {
    min-height: 70px;
    font-size: clamp(2.8rem, 13vw, 4.7rem);
  }

  .teacher-page .teacher-item {
    min-height: 54px;
    font-size: clamp(2.2rem, 10vw, 3.8rem);
  }

  .quiz-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .quiz-actions .primary-button {
    grid-column: 1 / -1;
  }

  .trace-target strong {
    font-size: 96px;
  }

  .trace-board,
  canvas {
    min-height: 420px;
  }
}

@media (max-width: 380px) {
  .workbench {
    padding: 14px;
  }

  .topbar {
    margin: -14px -14px 14px;
    padding: 12px 14px;
  }

  .mode-tab,
  .kid-toggle,
  .theme-toggle,
  .primary-button,
  .ghost-button,
  .mark-lesson-button {
    padding-inline: 10px;
    font-size: 14px;
  }

  .big-arabic-button {
    min-height: 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}