:root {
  color-scheme: light;
  --bg: #f5efe6;
  --surface: rgba(255, 250, 241, 0.94);
  --surface-strong: #fffaf1;
  --ink: #1f1a15;
  --muted: #6b5b49;
  --line: rgba(77, 58, 31, 0.14);
  --gm: #111827;
  --player: #ffffff;
  --ooc: #fbf0d8;
  --accent: #98622f;
  --shadow: 0 26px 68px rgba(66, 43, 20, 0.12);
  --font-sans: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background:
    radial-gradient(circle at top, rgba(227, 190, 131, 0.3), transparent 34%),
    linear-gradient(180deg, #faf6ee 0%, var(--bg) 42%, #ecdfc7 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

.session-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 72px;
  display: grid;
  gap: 18px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.session-hero {
  padding: 24px;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  align-items: end;
}

.session-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 0.96;
}

.eyebrow {
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-copy {
  margin: 14px 0 0;
  max-width: 48rem;
  line-height: 1.7;
  color: var(--muted);
}

.toggle {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  background: var(--gm);
  color: white;
  border-radius: 999px;
  padding: 12px 16px;
  font-size: 0.92rem;
}

.toggle input {
  accent-color: #f7d07b;
}

.hero-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb {
  padding: 0 4px;
}

.breadcrumb a {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.catalog-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.catalog-card {
  display: grid;
  gap: 14px;
  padding: 20px;
}

.catalog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.catalog-card h2 {
  margin: 0;
  font-size: 2rem;
  line-height: 1;
}

.catalog-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.catalog-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.session-metrics {
  padding: 18px;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.metric {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
  padding: 16px;
}

.metric-label {
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.metric-value {
  margin-top: 8px;
  font-size: 1.9rem;
  font-weight: 700;
}

/* Split layout */
.timeline {
  padding: 16px;
}

.transcript-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.transcript-layout.show-ooc {
  grid-template-columns: 1fr 300px;
  align-items: start;
}

/* IC column */
.ic-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  min-width: 0;
}

/* OOC sticky wrapper: handles position:sticky in grid */
.ooc-sticky {
  display: none;
  position: sticky;
  top: 16px;
  align-self: start;
}

.transcript-layout.show-ooc .ooc-sticky {
  display: block;
}

/* OOC panel: the actual scroll container (position:relative = reliable offsetParent) */
.ooc-panel {
  position: relative;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--ooc);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ooc-empty {
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
  padding: 16px 0;
  letter-spacing: 0.08em;
}

.ooc-header {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 2px 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2px;
}

.ooc-item {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  padding: 10px 12px;
  font-size: 0.88rem;
  transition: border-color 0.3s, background 0.3s;
}

.ooc-item.ooc-hidden {
  display: none;
}

.ooc-item.ooc-reveal {
  animation: ooc-fadein 0.4s ease;
}

@keyframes ooc-fadein {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ooc-item.ooc-current {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.92);
}

.ooc-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.ooc-author {
  font-weight: 700;
  font-size: 0.78rem;
}

.ooc-content {
  line-height: 1.6;
  color: var(--ink);
}

/* Message rows */
.message-row {
  display: grid;
  gap: 8px;
}

/* IC cards — all left-aligned, same width */
.message-card {
  border-radius: 26px;
  border: 1px solid var(--line);
  padding: 18px;
}

.message-card.player {
  background: var(--player);
}

.message-card.gm {
  background: var(--gm);
  color: white;
  border-color: rgba(255, 255, 255, 0.08);
}

.message-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.message-author {
  font-weight: 700;
}

.badge {
  padding: 5px 8px;
  border-radius: 999px;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.message-card.player .badge {
  background: rgba(0, 0, 0, 0.07);
  color: #475569;
}

.message-card.gm .badge {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.78);
}

.reply {
  font-size: 0.76rem;
  color: inherit;
  opacity: 0.7;
}

/* Discord mention */
.mention {
  display: inline-block;
  background: rgba(88, 101, 242, 0.12);
  color: #4752c4;
  border-radius: 4px;
  padding: 0 4px;
  font-weight: 600;
  font-size: 0.9em;
}

.message-content {
  margin-top: 12px;
  line-height: 1.75;
}

/* Markdown: headings */
.message-content .md-h1 {
  font-size: 1.5em;
  font-weight: 700;
  margin: 10px 0 4px;
  line-height: 1.2;
}

.message-content .md-h2 {
  font-size: 1.25em;
  font-weight: 700;
  margin: 8px 0 4px;
  line-height: 1.2;
}

.message-content .md-h3 {
  font-size: 1.05em;
  font-weight: 700;
  margin: 6px 0 4px;
  line-height: 1.2;
}

/* Markdown: subtext (-#) */
.message-content .md-subtext {
  display: block;
  font-size: 0.78em;
  color: var(--muted);
  margin: 2px 0;
}

.message-card.gm .message-content .md-subtext {
  color: rgba(255, 255, 255, 0.55);
}

/* Markdown: inline code */
.message-content code {
  background: rgba(0, 0, 0, 0.08);
  padding: 2px 6px;
  border-radius: 6px;
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", monospace;
  font-size: 0.87em;
}

.message-card.gm .message-content code {
  background: rgba(255, 255, 255, 0.14);
}

/* Markdown: code block */
.message-content pre {
  background: rgba(0, 0, 0, 0.06);
  padding: 14px 16px;
  border-radius: 14px;
  overflow-x: auto;
  margin: 10px 0 0;
}

.message-card.gm .message-content pre {
  background: rgba(255, 255, 255, 0.08);
}

.message-content pre code {
  background: none;
  padding: 0;
  font-size: 0.85em;
}

/* Markdown: blockquote */
.message-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 8px 0;
  padding: 2px 0 2px 14px;
  color: var(--muted);
}

.message-card.gm .message-content blockquote {
  border-left-color: rgba(255, 255, 255, 0.36);
  color: rgba(255, 255, 255, 0.65);
}

/* Markdown: links */
.message-content a {
  color: var(--accent);
  text-decoration: underline;
  word-break: break-all;
}

.message-card.gm .message-content a {
  color: #f7d07b;
}

.attachments,
.embeds {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.image-card {
  display: block;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(0, 0, 0, 0.04);
}

.image-card img {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}

.image-card footer {
  display: flex;
  justify-content: space-between;
  padding: 12px 14px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.file-card,
.embed-card {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 20px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.7);
}

.embed-card {
  display: grid;
}

.embed-title {
  font-weight: 700;
}

/* Date separator */
.date-separator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.date-separator::before,
.date-separator::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* Floating nav */
.floating-nav {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
  z-index: 100;
}

.nav-btn {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 0.82rem;
  font-family: var(--font-sans);
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(66, 43, 20, 0.14);
  transition: transform 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(66, 43, 20, 0.2);
}

.nav-btn-accent {
  background: var(--gm);
  color: white;
  border-color: transparent;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 100px;
  right: 24px;
  background: var(--gm);
  color: white;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-family: var(--font-sans);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s;
  z-index: 200;
  pointer-events: none;
}

.toast.toast-visible {
  opacity: 1;
  transform: translateY(0);
}

.hidden {
  display: none;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.lightbox.lightbox-open {
  display: flex;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
}

.lightbox-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 10px;
  display: block;
}

.lightbox-close {
  position: absolute;
  top: -44px;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 1.4rem;
  cursor: pointer;
  padding: 8px 12px;
  opacity: 0.8;
  transition: opacity 0.15s;
}

.lightbox-close:hover {
  opacity: 1;
}

.image-card {
  cursor: pointer;
}

@media (max-width: 760px) {
  .session-shell {
    width: min(100vw - 20px, 100%);
    padding-top: 14px;
  }

  .session-hero {
    align-items: start;
    flex-direction: column;
  }

  /* 防止訊息卡超出螢幕 */
  .message-card {
    max-width: 100%;
    min-width: 0;
    word-break: break-word;
    overflow-wrap: break-word;
  }

  .message-content {
    min-width: 0;
    overflow-wrap: break-word;
  }

  /* 圖片不超出容器 */
  .image-card img {
    width: 100%;
    max-height: 280px;
  }

  /* 手機版：OOC 改為單欄，收在 IC 下方，不 sticky */
  .transcript-layout.show-ooc {
    grid-template-columns: 1fr;
  }

  .ooc-sticky {
    position: static;
  }

  .ooc-panel {
    max-height: 320px;
  }
}