/* ============================================================
   Solworks Decks — Index Page
   ============================================================ */

:root {
  --navy: #0B1D3A;
  --navy-soft: #1E3352;
  --cognac: #C17F59;
  --cognac-soft: #E8CAB5;
  --cream: #FDF6E3;
  --warm-beige: #F5EBCF;
  --white: #FFFFFF;
  --ink: #1A1A1A;
  --subtle: #6B6B6B;
  --muted: #A0A0A0;
  --hairline: #D8CEB5;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang TC', 'Microsoft JhengHei',
               'Noto Sans TC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--cream);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Password gate (same as deck) ---------- */
.gate {
  position: fixed;
  inset: 0;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 2rem;
}

.gate-card { max-width: 420px; width: 100%; text-align: center; }

.gate-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cognac);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.gate-title {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.gate-sub {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 2.5rem;
}

.gate-input {
  width: 100%;
  padding: 0.9rem 1.2rem;
  font-size: 1rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  color: var(--white);
  margin-bottom: 0.8rem;
  outline: none;
  transition: all 0.2s;
  font-family: inherit;
  text-align: center;
  letter-spacing: 0.2em;
}

.gate-input:focus { border-color: var(--cognac); background: rgba(255,255,255,0.12); }

.gate-input.error {
  border-color: #e08888;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.gate-btn {
  width: 100%;
  padding: 0.9rem;
  background: var(--cognac);
  color: var(--white);
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s;
}

.gate-btn:hover { background: #a86a45; }

.gate-error {
  font-size: 0.85rem;
  color: #ff9999;
  margin-top: 0.8rem;
  min-height: 1.2rem;
}

/* ---------- Index layout ---------- */
.index-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

.index-header {
  margin-bottom: 4rem;
}

.index-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cognac);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.index-title {
  font-size: 4rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 0.6rem;
}

.index-sub {
  font-size: 1.05rem;
  color: var(--subtle);
}

/* ---------- Deck grid (Google Drive style) ---------- */
.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.deck-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--hairline);
  transition: transform 0.25s ease, box-shadow 0.3s ease, border-color 0.2s;
  cursor: pointer;
}

.deck-card:hover {
  transform: translateY(-4px);
  border-color: var(--cognac);
  box-shadow: 0 4px 12px rgba(11, 29, 58, 0.06),
              0 16px 32px rgba(11, 29, 58, 0.1);
}

.deck-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--navy);
  position: relative;
  overflow: hidden;
}

.deck-thumb iframe {
  position: absolute;
  /* Render the deck at full size and scale down to fit */
  width: 1440px;
  height: 810px;
  top: 0;
  left: 0;
  border: none;
  pointer-events: none;
  transform: scale(calc(280 / 1440));
  transform-origin: top left;
}

.deck-thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 29, 58, 0.6) 100%);
  opacity: 0;
  transition: opacity 0.2s;
}

.deck-card:hover .deck-thumb-overlay {
  opacity: 1;
}

.deck-thumb-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--white);
  text-align: center;
  padding: 1.5rem;
}

.deck-thumb-fallback .ft-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cognac);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.deck-thumb-fallback .ft-title {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.2;
}

.deck-meta {
  padding: 1.2rem 1.4rem 1.4rem;
}

.deck-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.3rem;
  line-height: 1.3;
}

.deck-card-sub {
  font-size: 0.85rem;
  color: var(--subtle);
  margin-bottom: 0.7rem;
  line-height: 1.4;
}

.deck-card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--muted);
}

.deck-card-tags {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.deck-card-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: var(--warm-beige);
  color: var(--cognac);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.deck-card-updated {
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- Footer ---------- */
.index-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--hairline);
  text-align: center;
}

.logout-btn {
  background: none;
  border: 1px solid var(--hairline);
  color: var(--subtle);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.logout-btn:hover {
  border-color: var(--cognac);
  color: var(--cognac);
}

@media (max-width: 600px) {
  .index-main { padding: 2.5rem 1.2rem 4rem; }
  .index-title { font-size: 2.6rem; }
  .deck-grid { gap: 1.2rem; }
}