/* REFH courseware: shared responsive + vocab card overflow fixes
   Linked from every lesson page as ../../assets/css/responsive.css */

html {
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  overflow-x: clip;
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

img,
video,
canvas,
svg {
  max-width: 100%;
}

/* —— Top nav: hamburger under 760px —— */
.nav-toggle {
  display: none;
  border: 1px solid var(--border, #e5e5e5);
  background: var(--surface, #fff);
  color: var(--primary, #333);
  width: 40px;
  height: 40px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.top-nav {
  gap: 10px;
  padding-left: max(14px, env(safe-area-inset-left, 0px));
  padding-right: max(14px, env(safe-area-inset-right, 0px));
}

.top-nav .brand {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: min(52vw, 420px);
}

.top-nav .nav-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }

  .top-nav {
    flex-wrap: wrap;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .top-nav .links {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 8px 0 4px;
  }

  .top-nav.nav-open .links { display: flex; }

  .top-nav .links a {
    padding: 10px 12px;
    font-size: 0.92rem;
    border-radius: 10px;
  }

  .top-nav .brand { max-width: calc(100% - 110px); font-size: 0.92rem; }

  .top-nav .site-home { font-size: 0.75rem; }
}

/* —— Home / article / gallery —— */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr !important;
    min-height: auto !important;
    padding: 20px 16px !important;
    gap: 20px !important;
  }

  .module-grid { grid-template-columns: 1fr !important; }

  .structure-box,
  .article-box,
  .photo-strip {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }

  .article-full { padding: 18px 16px !important; font-size: 0.98rem !important; }

  .photo-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)) !important; }

  .photo-card img { height: 150px !important; }

  .structure-grid { grid-template-columns: 1fr 1fr !important; }
}

@media (max-width: 560px) {
  .structure-grid { grid-template-columns: 1fr !important; }

  .module-card { padding: 18px 16px 48px !important; }

  .hero-text h1 { font-size: clamp(1.35rem, 7vw, 1.85rem) !important; }

  .page-header h1 { font-size: clamp(1.25rem, 6vw, 1.7rem) !important; }
}

/* —— Vocabulary cards: grow with text, 句型 never clip —— */
.card-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 158px), 1fr)) !important;
  align-items: stretch;
}

.flip-card {
  aspect-ratio: auto !important;
  min-height: 150px;
  height: auto !important;
}

.flip-card .flip-inner {
  height: auto !important;
  min-height: 150px;
}

.flip-card .flip-front {
  position: relative !important;
  inset: auto !important;
  height: auto !important;
  min-height: 150px;
  overflow: visible;
  box-sizing: border-box;
}

.flip-card .card-word {
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
  max-width: 100%;
  line-height: 1.35;
}

.flip-card--phrase,
.flip-card--pattern {
  grid-column: span 2;
  min-height: 0;
}

.flip-card--phrase .flip-inner,
.flip-card--pattern .flip-inner,
.flip-card--phrase .flip-front,
.flip-card--pattern .flip-front {
  min-height: 136px;
  align-items: flex-start;
  justify-content: flex-start;
  text-align: left;
  padding: 14px 16px;
}

.flip-card--phrase .card-word {
  font-size: clamp(0.88rem, 2.2vw, 1.08rem) !important;
}

.flip-card--pattern {
  grid-column: 1 / -1;
}

@media (min-width: 900px) {
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)) !important; }
}

.flip-card--pattern .card-word {
  font-size: clamp(0.86rem, 2.1vw, 1.12rem) !important;
  line-height: 1.45 !important;
}

.flip-card--pattern .tap-hint,
.flip-card--phrase .tap-hint {
  margin-top: 10px;
  align-self: flex-end;
}

/* Badge fallback (some lessons omit these in shared.css) */
.badge {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.3;
}
.badge-word { background: #dbeafe; color: #1d4ed8; }
.badge-verb { background: #fce7f3; color: #be185d; }
.badge-noun { background: #fef3c7; color: #b45309; }
.badge-adj { background: #ede9fe; color: #6d28d9; }
.badge-pattern { background: #ecfdf5; color: #047857; }

@media (max-width: 420px) {
  .card-grid { grid-template-columns: 1fr 1fr !important; gap: 10px !important; }
  .flip-card--phrase,
  .flip-card--pattern { grid-column: 1 / -1; }
  .flip-card:not(.flip-card--phrase):not(.flip-card--pattern) { min-height: 132px; }
  .stats-bar { gap: 8px !important; }
  .stat { flex: 1 1 28%; padding: 10px 8px !important; min-width: 0; }
  .stat span { font-size: 0.68rem !important; line-height: 1.25; word-break: break-word; }
}

/* Vocab modal: long 句型 titles */
.modal {
  max-width: min(680px, calc(100vw - 24px)) !important;
  max-height: min(90vh, calc(100dvh - 24px)) !important;
}

.vocab-word {
  display: inline-block;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
  font-size: clamp(1.15rem, 4.4vw, 2rem);
  line-height: 1.3;
}

.modal-header {
  flex-wrap: wrap;
  padding: 18px 16px 0 !important;
}

.modal-body { padding: 12px 16px 20px !important; }

/* —— Reading —— */
@media (max-width: 640px) {
  .page { padding: 16px 12px 72px !important; }

  .article-masthead { padding: 20px 16px !important; }

  .para-body { padding: 8px 14px 18px !important; }

  .socratic-box { padding: 16px 14px !important; }

  .sentence-row { flex-wrap: wrap; gap: 8px !important; }

  .sentence-actions { width: 100%; justify-content: flex-end; }

  .toolbar { top: 52px; padding: 10px !important; }

  .toolbar-row { gap: 6px !important; }

  .toolbar .btn { padding: 7px 12px; font-size: 0.8rem; }

  .quiz-section { padding: 16px 12px !important; }

  .quiz-opt { padding: 12px !important; font-size: 0.88rem !important; }
}

/* —— Speaking —— */
@media (max-width: 640px) {
  .sentence-card { padding: 24px 16px !important; }

  .ctrl-btn { min-width: 88px !important; padding: 12px 10px !important; }

  .score-grid { grid-template-columns: repeat(3, 1fr) !important; }
}

/* —— Quiz (no top-nav; own bar) —— */
.quiz-nav {
  flex-wrap: wrap;
  gap: 8px 10px;
  padding: 10px 12px !important;
}

.quiz-nav > div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
}

@media (max-width: 768px) {
  .quiz-nav b { font-size: 0.92rem; }

  .quiz-export-btn,
  .quiz-export-print,
  .nav-btn {
    font-size: 0.75rem !important;
    padding: 6px 10px !important;
    margin: 0 !important;
  }

  .cloze-wrap {
    flex-direction: column !important;
    padding: 0 12px !important;
    overflow: auto !important;
  }

  .c-left,
  .c-right { flex: none !important; }

  .v-def-en { min-width: 0 !important; }

  .pdf-bar { gap: 8px !important; }

  .scroll-area { padding: 12px 12px 100px !important; }

  .page-title { padding: 12px 12px !important; font-size: 0.95rem !important; }
}

@media (max-width: 480px) {
  body:has(.quiz-wrap) {
    height: 100dvh !important;
  }

  .quiz-nav { align-items: flex-start; }

  .inline-inp,
  .inline-inp.short {
    max-width: 100%;
    width: min(100%, 160px);
  }
}

/* —— Copywork —— */
@media (max-width: 640px) {
  .copy-page-wrap { padding: 16px 12px 48px !important; }

  .copy-hero { padding: 16px 14px 12px !important; }

  .copy-hero h1 { font-size: 1.35rem !important; }

  .copy-toolbar { gap: 8px !important; }
}

/* Config drawer on phones */
@media (max-width: 480px) {
  .config-panel {
    width: 100vw !important;
    max-width: 100vw !important;
    right: -100vw;
  }
}

/* Touch: disable hover tilt that feels jumpy */
@media (hover: none) {
  .flip-card:hover .flip-inner { transform: none !important; }
  .module-card:hover { transform: none !important; }
}