/* Photo Caption Trainer — calm, minimal, photo-first, workshop-friendly */

:root {
  --ink: #26302b;
  --ink-soft: #5a6660;
  --paper: #f7f4ee;
  --card: #ffffff;
  --accent: #2f4f43;
  --accent-soft: #e4ece7;
  --gold: #c9a86a;
  --danger: #a4463c;
  --line: #ddd6c9;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(38, 48, 43, 0.08);
  --font: "Georgia", "Iowan Old Style", "Palatino Linotype", serif;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e6df;
    --ink-soft: #a8b0aa;
    --paper: #1c211e;
    --card: #262d29;
    --accent: #8fb8a5;
    --accent-soft: #2f3d36;
    --line: #3a443e;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh; /* mobile browsers with collapsing URL bars */
  display: flex;
  flex-direction: column;
}

button, .btn, .nav-btn, .icon-btn, .studio-tab, .photo-card, .ex-option, .exercise-card {
  touch-action: manipulation;           /* no 300ms double-tap zoom delay */
  -webkit-tap-highlight-color: transparent;
}

h1, h2, h3 { font-family: var(--font); font-weight: 600; line-height: 1.25; }
h2 { font-size: 1.7rem; margin: 0 0 0.5rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.5rem; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 0.5rem 1rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.app-header {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: 0.7rem 1.2rem;
  padding-top: max(0.7rem, env(safe-area-inset-top));
  padding-left: max(1.2rem, env(safe-area-inset-left));
  padding-right: max(1.2rem, env(safe-area-inset-right));
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 0.55rem; }
.brand-mark { font-size: 1.4rem; }
.brand-text { line-height: 1.15; }
.brand h1 { font-size: 1.15rem; margin: 0; }
.brand-by {
  font-size: 0.74rem; color: var(--ink-soft); text-decoration: none;
  letter-spacing: 0.03em;
}
.brand-by:hover, .brand-by:focus-visible { color: var(--accent); text-decoration: underline; }

.main-nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }
.nav-btn {
  border: none; background: transparent; color: var(--ink-soft);
  font-size: 1rem; padding: 0.45rem 0.9rem; border-radius: 999px; cursor: pointer;
}
.nav-btn:hover { background: var(--accent-soft); color: var(--ink); }
.nav-btn.active { background: var(--accent); color: #fff; }

.header-status { margin-left: auto; display: flex; gap: 0.5rem; }
.badge {
  font-size: 0.78rem; padding: 0.2rem 0.7rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--ink);
}
.badge-offline { background: var(--gold); color: #2c2413; }

/* ---------- Layout ---------- */
main { flex: 1; width: 100%; max-width: 1200px; margin: 0 auto; padding: 1.5rem 1.2rem 4rem; }
.view[hidden] { display: none; }

.app-footer {
  border-top: 1px solid var(--line); padding: 1rem 1.2rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  color: var(--ink-soft); font-size: 0.82rem; text-align: center;
}
.app-footer p { margin: 0.25rem 0; }
.app-footer a { color: var(--accent); }
.footer-brand strong { color: var(--ink); }

/* ---------- Buttons & fields ---------- */
.btn {
  font-family: var(--font-ui); font-size: 1rem;
  padding: 0.6rem 1.25rem; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  transition: background 0.15s, transform 0.05s;
}
.btn:hover { background: var(--accent-soft); }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent); filter: brightness(1.12); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-soft); }
.btn-ghost:hover { background: var(--accent-soft); color: var(--ink); }
.btn-small { font-size: 0.88rem; padding: 0.4rem 0.9rem; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger-ghost { color: var(--danger); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }

.icon-btn {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 10px; min-width: 2.4rem; height: 2.4rem; font-size: 1.05rem; cursor: pointer;
}
.icon-btn:hover { background: var(--accent-soft); }
.icon-btn[aria-pressed="true"] { background: var(--accent); color: #fff; }

input[type="text"], textarea, select {
  width: 100%; font-family: var(--font-ui); font-size: 1rem;
  padding: 0.6rem 0.8rem; border: 1px solid var(--line); border-radius: 10px;
  background: var(--card); color: var(--ink); margin-top: 0.25rem;
}
textarea { resize: vertical; }
label { display: block; margin-bottom: 0.8rem; font-size: 0.92rem; color: var(--ink-soft); }
.check-label { display: flex; align-items: center; gap: 0.55rem; color: var(--ink); cursor: pointer; }
.check-label input { width: 1.15rem; height: 1.15rem; }

:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

.hint { color: var(--ink-soft); font-size: 0.88rem; }

/* ---------- Library ---------- */
.library-intro { text-align: center; max-width: 620px; margin: 1rem auto 2rem; }
.library-intro p { color: var(--ink-soft); }

.dropzone {
  border: 2px dashed var(--line); border-radius: var(--radius);
  background: var(--card); cursor: pointer; padding: 2.5rem 1rem;
  text-align: center; transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: var(--accent-soft); }
.dropzone-icon { font-size: 2rem; display: block; margin-bottom: 0.4rem; color: var(--accent); }
.dropzone-title { font-family: var(--font); font-size: 1.25rem; margin: 0.2rem 0; }
.dropzone-sub { color: var(--ink-soft); font-size: 0.88rem; margin: 0; }

.library-actions { display: flex; gap: 0.8rem; justify-content: center; margin: 1.2rem 0 2rem; flex-wrap: wrap; }

.photo-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1.2rem;
}
.photo-card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  overflow: hidden; cursor: pointer; border: 1px solid var(--line);
  transition: transform 0.12s;
  text-align: left; padding: 0; font-family: var(--font-ui);
}
.photo-card:hover { transform: translateY(-3px); }
.photo-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; background: #111; }
.photo-card-body { padding: 0.7rem 0.9rem 0.9rem; }
.photo-card-title { font-weight: 600; font-size: 0.95rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); }
.photo-card-meta { font-size: 0.8rem; color: var(--ink-soft); display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.2rem; }
.pill { background: var(--accent-soft); border-radius: 999px; padding: 0.05rem 0.55rem; }
.photo-progress { height: 4px; border-radius: 4px; background: var(--line); margin-top: 0.55rem; overflow: hidden; }
.photo-progress > span { display: block; height: 100%; background: var(--accent); }

.empty-note {
  text-align: center; color: var(--ink-soft); padding: 2rem 1rem;
  border: 1px dashed var(--line); border-radius: var(--radius); margin: 1rem 0;
}

/* ---------- Studio ---------- */
.studio-topbar { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.photo-title { font-family: var(--font); font-size: 1.1rem; font-weight: 600; }
.studio-tabs { display: flex; gap: 0.3rem; margin-left: auto; flex-wrap: wrap; }
.studio-tab {
  border: 1px solid var(--line); background: var(--card); color: var(--ink-soft);
  padding: 0.45rem 1rem; border-radius: 999px; cursor: pointer; font-size: 0.92rem;
}
.studio-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.studio-layout {
  display: grid; grid-template-columns: minmax(300px, 5fr) minmax(320px, 6fr); gap: 1.5rem;
  align-items: start;
}

.viewer-pane { position: sticky; top: 76px; }
.viewer {
  background: #14171a; border-radius: var(--radius); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  min-height: 260px; max-height: 62vh;
}
.viewer img {
  max-width: 100%; max-height: 62vh; object-fit: contain;
  transition: transform 0.2s ease; transform-origin: center center;
}
.viewer:fullscreen { max-height: none; }
.viewer:fullscreen img { max-height: 100vh; }
/* Fallback fullscreen for browsers without the Fullscreen API (iPhone Safari) */
.viewer.pseudo-fullscreen {
  position: fixed; inset: 0; z-index: 60;
  max-height: none; border-radius: 0;
}
.viewer.pseudo-fullscreen img { max-height: 100dvh; }
.viewer.pseudo-fullscreen::after {
  content: "Tap to exit fullscreen";
  position: absolute; bottom: max(1rem, env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,0.55); color: #fff; font-size: 0.8rem;
  padding: 0.3rem 0.9rem; border-radius: 999px;
}
.viewer-controls { display: flex; gap: 0.4rem; margin-top: 0.6rem; flex-wrap: wrap; }

.metadata-panel, .field-group {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.2rem; margin-top: 0.8rem;
}
.metadata-panel dl, .detail-meta { margin: 0.4rem 0; }
.metadata-panel dt, .detail-meta dt { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); margin-top: 0.5rem; }
.metadata-panel dd, .detail-meta dd { margin: 0; font-size: 0.95rem; }

/* ---------- Interview ---------- */
.progress-wrap { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 1rem; }
.progress-track { flex: 1; height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: var(--accent); border-radius: 999px; transition: width 0.3s; }
.progress-text { font-size: 0.85rem; color: var(--ink-soft); white-space: nowrap; }

.question-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.6rem 1.6rem 1.4rem;
}
.q-category {
  display: inline-block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em;
  background: var(--accent-soft); color: var(--accent); border-radius: 999px;
  padding: 0.15rem 0.75rem; font-weight: 700; margin-bottom: 0.6rem;
}
.q-text { font-size: 1.55rem; margin: 0 0 0.3rem; }
.q-hint { color: var(--ink-soft); font-size: 0.92rem; margin: 0 0 1rem; }
.answer-input { font-size: 1.05rem; line-height: 1.6; }

.voice-row { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.7rem; flex-wrap: wrap; }
.record-status { font-size: 0.85rem; color: var(--danger); }
#answer-audio { width: 100%; margin-top: 0.6rem; }

.q-nav { display: flex; gap: 0.6rem; margin-top: 1.2rem; }
.q-nav .btn-primary { margin-left: auto; }

.interview-dots { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 1.1rem 0 0.4rem; }
.q-dot {
  width: 0.85rem; height: 0.85rem; border-radius: 50%;
  border: 1px solid var(--line); background: var(--card); cursor: pointer; padding: 0;
}
.q-dot.answered { background: var(--accent); border-color: var(--accent); }
.q-dot.current { outline: 3px solid var(--gold); outline-offset: 1px; }
.interview-footer { text-align: right; margin-top: 0.5rem; }

/* ---------- Captions ---------- */
.captions-header { display: flex; align-items: flex-start; gap: 1rem; justify-content: space-between; flex-wrap: wrap; margin-bottom: 1rem; }

.captions-container { display: flex; flex-direction: column; gap: 1rem; }
.caption-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.2rem;
}
.caption-card-head { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.caption-style { font-family: var(--font); font-size: 1.05rem; font-weight: 700; }
.caption-use { font-size: 0.8rem; color: var(--ink-soft); }

.caption-toolbar { display: flex; gap: 0.3rem; margin: 0.6rem 0 0.35rem; flex-wrap: wrap; align-items: center; }
.fmt-btn {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 8px; min-width: 2rem; height: 2rem; cursor: pointer; font-size: 0.9rem;
}
.fmt-btn:hover { background: var(--accent-soft); }
.fmt-btn b { font-weight: 800; }

.caption-editor {
  border: 1px solid var(--line); border-radius: 10px; background: var(--paper);
  padding: 0.7rem 0.9rem; min-height: 3.2rem; font-size: 1rem; line-height: 1.6;
}
.caption-editor:focus { outline: 3px solid var(--gold); outline-offset: 1px; }

.caption-counts { font-size: 0.8rem; color: var(--ink-soft); margin-top: 0.35rem; }
.caption-actions { display: flex; gap: 0.45rem; margin-top: 0.6rem; flex-wrap: wrap; }
.caption-feedback { margin-top: 0.6rem; padding: 0.6rem 0.8rem; background: var(--accent-soft); border-radius: 10px; font-size: 0.88rem; }
.caption-feedback ul { margin: 0.2rem 0 0; padding-left: 1.2rem; }

.coach-panel, .export-panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.2rem; margin-top: 1.2rem;
}
.coach-panel ul { margin: 0.4rem 0 0; padding-left: 1.3rem; }
.coach-panel li { margin-bottom: 0.35rem; }
.export-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.5rem; }

.facilitator-note {
  margin-top: 1rem; padding: 0.8rem 1rem; border-left: 4px solid var(--gold);
  background: var(--card); border-radius: 0 10px 10px 0; font-size: 0.92rem;
}

/* ---------- Learn ---------- */
.learn-intro, .exercises-intro { max-width: 680px; margin: 0.5rem auto 1.5rem; text-align: center; }
.learn-intro p, .exercises-intro p { color: var(--ink-soft); }
.exercises-intro { margin-top: 3rem; }

.learn-topics { display: grid; gap: 0.8rem; max-width: 800px; margin: 0 auto; }
.learn-topic {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.learn-topic summary {
  cursor: pointer; padding: 1rem 1.2rem; font-family: var(--font);
  font-size: 1.1rem; font-weight: 600; list-style: none; position: relative;
}
.learn-topic summary::after { content: "+"; position: absolute; right: 1.2rem; color: var(--accent); font-size: 1.3rem; }
.learn-topic[open] summary::after { content: "−"; }
.learn-topic-body { padding: 0 1.2rem 1.2rem; }
.learn-topic-body p, .learn-topic-body li { color: var(--ink); font-size: 0.97rem; }
.learn-topic-body .example { background: var(--accent-soft); border-radius: 10px; padding: 0.7rem 0.9rem; margin: 0.6rem 0; font-size: 0.92rem; }
.learn-topic-body .example strong { color: var(--accent); }

.exercise-menu { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1rem; max-width: 1000px; margin: 0 auto; }
.exercise-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.2rem; cursor: pointer; text-align: left; font-family: var(--font-ui);
  color: var(--ink);
}
.exercise-card:hover { border-color: var(--accent); background: var(--accent-soft); }
.exercise-card h3 { margin-bottom: 0.3rem; }
.exercise-card p { margin: 0; font-size: 0.88rem; color: var(--ink-soft); }

.exercise-area {
  max-width: 800px; margin: 1.5rem auto 0; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem;
}
.exercise-area img.ex-img { width: 100%; max-width: 380px; border-radius: 10px; display: block; margin: 0.6rem auto; }
.ex-option {
  display: block; width: 100%; text-align: left; margin: 0.4rem 0; padding: 0.7rem 0.9rem;
  border: 1px solid var(--line); border-radius: 10px; background: var(--paper);
  cursor: pointer; font-size: 0.95rem; color: var(--ink); font-family: var(--font-ui);
}
.ex-option:hover { border-color: var(--accent); }
.ex-option.correct { border-color: var(--accent); background: var(--accent-soft); }
.ex-option.wrong { border-color: var(--danger); }
.ex-feedback { margin-top: 0.8rem; padding: 0.7rem 0.9rem; border-radius: 10px; background: var(--accent-soft); }
.ex-feedback.ok { border-left: 4px solid var(--accent); }
.ex-feedback ul { margin: 0.3rem 0 0; padding-left: 1.2rem; }

/* ---------- Workshop ---------- */
.facilitator-toggle { max-width: 800px; margin: 0 auto 1.2rem; justify-content: center; }
#workshop-tools { max-width: 900px; margin: 0 auto; }
.assignment-list { display: grid; gap: 0.7rem; margin-bottom: 0.8rem; }
.assignment-item {
  border: 1px solid var(--line); border-radius: 10px; padding: 0.8rem 1rem; background: var(--paper);
}
.assignment-item h4 { margin: 0 0 0.2rem; font-family: var(--font); }
.assignment-item p { margin: 0.15rem 0; font-size: 0.9rem; color: var(--ink-soft); }
.assignment-form summary { display: inline-block; margin-bottom: 0.8rem; }
.assignment-form summary::-webkit-details-marker { display: none; }

.review-area { display: grid; gap: 1rem; margin: 0.8rem 0 1.2rem; }
.review-item {
  display: grid; grid-template-columns: 110px 1fr; gap: 0.9rem;
  border: 1px solid var(--line); border-radius: 10px; padding: 0.8rem; background: var(--paper);
}
.review-item img { width: 110px; height: 82px; object-fit: cover; border-radius: 8px; background: #111; }
.review-item h4 { margin: 0 0 0.2rem; font-family: var(--font); font-size: 1rem; }
.review-caption { font-size: 0.9rem; margin: 0.2rem 0; }
.review-item textarea { font-size: 0.9rem; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; max-width: 1000px; margin: 0 auto; }
.about-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.3rem; }
.about-card p { color: var(--ink-soft); font-size: 0.94rem; margin: 0; }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(20, 24, 22, 0.55);
  display: flex; align-items: center; justify-content: center; z-index: 50; padding: 1rem;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--card); border-radius: var(--radius); max-width: 760px; width: 100%;
  max-height: 85vh; overflow: auto; box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.3rem 0.5rem; position: sticky; top: 0; background: var(--card);
}
.modal-head h3 { margin: 0; }
.modal-body { padding: 0.5rem 1.3rem 1.3rem; }
.version-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.version-box { border: 1px solid var(--line); border-radius: 10px; padding: 0.8rem; }
.version-box h4 { margin: 0 0 0.4rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); }
.version-list { list-style: none; margin: 0; padding: 0; }
.version-list li { border-bottom: 1px solid var(--line); padding: 0.6rem 0; }
.version-list .v-meta { font-size: 0.78rem; color: var(--ink-soft); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .studio-layout { grid-template-columns: 1fr; }
  .viewer-pane { position: static; }
  .viewer, .viewer img { max-height: 45vh; }
  .studio-tabs { margin-left: 0; }
}

/* Touch devices: comfortable 44px targets (Apple/Android guidelines) */
@media (pointer: coarse) {
  .btn, .icon-btn, .nav-btn, .studio-tab, .fmt-btn { min-height: 44px; }
  .icon-btn, .fmt-btn { min-width: 44px; }
  .q-dot { width: 1.15rem; height: 1.15rem; }
  input[type="text"], textarea, select { min-height: 44px; }
  .check-label input { width: 1.4rem; height: 1.4rem; }
}

@media (max-width: 560px) {
  html { font-size: 16px; }
  .app-header { padding: 0.6rem 0.8rem; padding-top: max(0.6rem, env(safe-area-inset-top)); }
  .header-status .badge:not(.local-clock) { display: none; }
  .local-clock { margin-left: auto; }
  main { padding: 1rem 0.8rem 3rem; }
  .q-text { font-size: 1.3rem; }
  .question-card { padding: 1.1rem 1rem 1rem; }
  .q-nav { flex-wrap: wrap; }
  .review-item { grid-template-columns: 1fr; }
  .review-item img { width: 100%; height: 140px; }
  .version-compare { grid-template-columns: 1fr; }
}

@media print {
  .app-header, .app-footer, .viewer-controls, .q-nav, .btn { display: none !important; }
}