/* Courseware 全站响应式 — 手机 / 平板 / 桌面 / 大屏 / 打印 */

/* ─── 基础适配 ─── */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.container {
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-bottom: max(40px, env(safe-area-inset-bottom, 0px));
}

select,
input[type="text"] {
  max-width: 100%;
}

.maze-grid {
  width: min(100%, 92vw);
  max-width: 420px;
}

/* 触控设备：加大可点区域 */
@media (hover: none) and (pointer: coarse) {
  .btn,
  .word-tab,
  .letter-block,
  .word-block,
  .quiz-option,
  .fish-card,
  .maze-cell,
  .memory-card,
  .media-tab,
  .back-link {
    min-height: 44px;
  }

  .letter-block,
  .word-block {
    min-width: 44px;
  }

  .nav-card:hover,
  .book-card:hover,
  .btn:hover {
    transform: none;
  }
}

/* ─── 平板及以下 (≤1024px) ─── */
@media (max-width: 1024px) {
  .container {
    max-width: 100%;
    padding-top: 20px;
  }

  .nav-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
  }

  .memory-board {
    max-width: 100%;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }

  .fish-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lookup-modal {
    max-width: min(480px, 94vw);
  }
}

/* ─── 小平板 / 大手机 (≤768px) ─── */
@media (max-width: 768px) {
  .top-bar {
    grid-template-columns: 1fr auto;
    gap: 8px 10px;
  }

  .course-logo img {
    height: 32px;
    max-width: min(180px, 50vw);
  }

  .course-logo--hero img {
    height: 40px;
  }

  .top-bar .page-title {
    font-size: 1.25rem;
    text-align: center;
  }

  .back-link {
    justify-self: end;
  }

  .hero {
    padding: 20px 8px 18px;
  }

  .hero h1 {
    font-size: clamp(1.45rem, 6vw, 2rem);
  }

  .hero .mascot {
    font-size: 2.75rem;
  }

  .section-title {
    font-size: 0.92rem;
    margin: 24px 0 14px;
    max-width: 100%;
  }

  .nav-grid {
    grid-template-columns: 1fr;
  }

  .nav-card {
    padding: 18px 18px 16px 22px;
  }

  .card {
    padding: 18px 16px;
    border-radius: var(--radius);
  }

  .control-row {
    flex-direction: column;
    align-items: stretch;
  }

  .control-row label {
    width: 100%;
  }

  .control-row select,
  .control-row input[type="text"] {
    width: 100%;
  }

  .word-tabs {
    gap: 6px;
    max-height: 200px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }

  .word-tab {
    font-size: 0.82rem;
    padding: 8px 12px;
  }

  .word-image {
    width: 100%;
    height: auto;
    max-height: min(52vw, 240px);
    aspect-ratio: 4 / 3;
  }

  .media-toggle {
    display: flex;
    width: 100%;
  }

  .media-tab {
    flex: 1;
    justify-content: center;
    text-align: center;
    padding: 10px 8px;
    font-size: 0.82rem;
  }

  .four-line-sheet {
    width: 100%;
  }

  .action-row {
    flex-direction: column;
    align-items: stretch;
  }

  .action-row .btn {
    width: 100%;
  }

  .phoneme-box {
    min-width: 44px;
    height: 44px;
    font-size: 0.88rem;
  }

  .phoneme-box.wide {
    min-width: 56px;
  }

  .sentence-en {
    font-size: 1rem;
    line-height: 1.65;
    word-break: break-word;
  }

  .sentence-card {
    padding: 14px;
  }

  .timer-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    text-align: center;
    font-size: 0.92rem;
  }

  .lookup-modal {
    max-height: 90vh;
    padding: 22px 18px 18px;
    border-radius: var(--radius);
  }

  .lookup-word {
    font-size: 1.6rem;
  }

  .lookup-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .letter-pool,
  .word-pool {
    gap: 8px;
  }

  .letter-block,
  .word-block {
    font-size: 1.15rem;
    padding: 10px 12px;
  }

  .slot {
    width: 42px;
    height: 42px;
    font-size: 1.05rem;
  }

  .target-slots {
    gap: 6px;
    padding: 10px;
  }

  .maze-cell {
    font-size: clamp(0.65rem, 2.8vw, 0.95rem);
    border-radius: 6px;
  }

  .memory-board {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .memory-front {
    font-size: 1.5rem;
  }

  .memory-back--word {
    font-size: 1.2rem;
    padding: 6px;
  }

  .quiz-question {
    font-size: 1.25rem;
  }

  .quiz-question img {
    max-width: min(200px, 70vw);
  }

  .quiz-option {
    padding: 14px 12px;
    font-size: 1rem;
  }

  .fish-pond {
    min-height: 360px;
    padding: 16px 12px;
    border-radius: 18px;
  }

  .fish-listen-btn {
    width: 100%;
    max-width: 280px;
  }

  .fish-grid {
    gap: 8px;
  }

  .report-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .copy-toolbar,
  .dictation-toolbar,
  .lookup-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .copy-toolbar .btn,
  .dictation-toolbar .btn,
  .lookup-actions .btn {
    width: 100%;
  }

  .dictation-page {
    width: 100%;
    padding: 12px;
  }

  .dictation-item-body {
    flex-wrap: wrap;
    gap: 8px;
  }

  .dictation-img {
    width: 56px;
    height: 56px;
  }

  .grade-bg,
  .hub-bg {
    inset: -16px;
    filter: blur(4px);
  }
}

/* ─── 手机 (≤600px) ─── */
@media (max-width: 600px) {
  .container {
    padding-left: max(12px, env(safe-area-inset-left, 0px));
    padding-right: max(12px, env(safe-area-inset-right, 0px));
  }

  .page-title {
    font-size: 1.15rem;
  }

  .card-title {
    font-size: 1.05rem;
    flex-wrap: wrap;
  }

  .btn-lg {
    width: 100%;
    min-height: 48px;
  }

  .memory-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

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

  .maze-grid {
    width: 100%;
    gap: 3px;
  }

  .maze-cell {
    font-size: clamp(0.6rem, 3.2vw, 0.8rem);
  }

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

  .fish-card-word {
    font-size: 0.9rem;
  }

  .fish-pond {
    min-height: 340px;
  }

  .target-words {
    gap: 8px;
  }

  .target-word-item {
    min-width: 68px;
    padding: 8px;
  }

  .target-word-item img {
    width: 48px;
    height: 48px;
  }

  .stats-panel {
    padding: 16px;
  }

  .progress-ring {
    font-size: 2rem;
  }

  .feedback {
    font-size: 1.1rem;
  }
}

/* ─── 超小屏 (≤400px) ─── */
@media (max-width: 400px) {
  .hero h1 {
    -webkit-text-stroke: 1.5px #fff;
  }

  .phoneme-boxes {
    gap: 6px;
  }

  .phoneme-box {
    min-width: 40px;
    height: 40px;
    font-size: 0.8rem;
  }

  .letter-block,
  .word-block {
    min-width: 40px;
    min-height: 40px;
    font-size: 1rem;
  }

  .slot {
    width: 36px;
    height: 36px;
    font-size: 0.95rem;
  }

  .memory-front {
    font-size: 1.25rem;
  }
}

/* ─── 横屏手机 ─── */
@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    padding: 12px 8px;
  }

  .hero .mascot {
    display: none;
  }

  .fish-pond {
    min-height: 280px;
  }

  .container {
    padding-top: 12px;
    padding-bottom: 24px;
  }
}

/* ─── 大屏 (≥1280px) ─── */
@media (min-width: 1280px) {
  .container {
    max-width: 1160px;
    padding-left: 24px;
    padding-right: 24px;
  }

  .nav-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  .memory-board {
    max-width: 800px;
  }
}

/* ─── 超大屏 (≥1600px) ─── */
@media (min-width: 1600px) {
  .container {
    max-width: 1240px;
  }

  .word-image {
    max-width: 400px;
  }
}

/* ─── 打印（屏幕预览补充） ─── */
@media print {
  .grade-bg,
  .hub-bg,
  .course-logo {
    display: none !important;
  }

  body {
    background: #fff !important;
    background-image: none !important;
  }

  body::before,
  body::after {
    display: none !important;
  }

  .container {
    max-width: none;
    padding: 0;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }

  body.copy-print-body .card {
    break-inside: auto !important;
    page-break-inside: auto !important;
    border: none !important;
  }
}