:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-alt: #f1f4f8;
  --text: #161b22;
  --muted: #57606a;
  --border: #d0d7de;
  --accent: #0f4c81;
  --accent-soft: #e8f1fa;
  --low: #9a5b13;
  --low-bg: #fef3e2;
  --med: #0d6e6e;
  --med-bg: #e6f5f4;
  --high: #4338ca;
  --high-bg: #eef2ff;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.container {
  max-width: 1360px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.mono { font-family: var(--mono); }
.muted { color: var(--muted); font-size: 0.9rem; }

/* Header */
.site-header {
  background: #0f172a;
  color: #f8fafc;
  padding-block: 1.75rem;
  border-block-end: 3px solid var(--accent);
}
.header-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
}
.eyebrow {
  margin: 0 0 0.25rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #93c5fd;
  font-weight: 600;
}
.site-header h1 {
  margin: 0;
  font-size: clamp(1.35rem, 2.2vw, 1.9rem);
  line-height: 1.2;
}
.subtitle {
  margin: 0.4rem 0 0;
  color: #cbd5e1;
  font-size: 0.92rem;
}
.subtitle code {
  background: rgba(255, 255, 255, 0.12);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: #e2e8f0;
}
.header-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #f1f5f9;
}

/* Tabs (per modern-web-guidance: no padding/border/bg on [role="tabpanel"] itself) */
.main-content { padding-block: 1.25rem 2.5rem; }

.tablist {
  display: flex;
  overflow-x: auto;
  gap: 0.25rem;
  border-block-end: 1px solid var(--border);
  margin-block-end: 1rem;
}
[role="tab"] {
  position: relative;
  flex: none;
  appearance: none;
  background: transparent;
  border: 0;
  padding: 0.75rem 1.15rem;
  font: inherit;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}
[role="tab"]:hover { color: var(--text); }
[role="tab"][aria-selected="true"] {
  color: var(--accent);
}
[role="tab"][aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  border-block-end: 3px solid var(--accent);
}

.panel-body {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

/* Controls */
.controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
}
.control-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.control-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.segmented {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 7px;
  overflow: hidden;
  background: var(--surface-alt);
}
.segmented button {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0.38rem 0.75rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}
.segmented button[aria-pressed="true"] {
  background: var(--accent);
  color: #ffffff;
}
.slide-pager {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}
.stage-desc {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-ghost {
  font: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  border-radius: 7px;
  padding: 0.42rem 0.85rem;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
}
.btn-secondary:hover, .btn-ghost:hover { background: var(--surface-alt); }

/* Slides Grid */
.slides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1rem;
}
.slide-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.slide-card-head {
  padding: 0.7rem 0.9rem;
  border-block-end: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}
.slide-card-title { font-weight: 700; font-size: 0.95rem; }
.slide-card-sub { font-size: 0.82rem; color: var(--muted); padding: 0.45rem 0.9rem 0; }
.effort-pill {
  font-size: 0.74rem;
  font-weight: 700;
  padding: 0.16rem 0.55rem;
  border-radius: 999px;
}
.effort-low { background: var(--low-bg); color: var(--low); }
.effort-medium { background: var(--med-bg); color: var(--med); }
.effort-high { background: var(--high-bg); color: var(--high); }
.effort-blind { background: var(--surface-alt); color: var(--text); }

.slide-thumb-btn {
  appearance: none;
  border: 0;
  padding: 0.65rem 0.9rem 0.9rem;
  background: transparent;
  cursor: zoom-in;
  display: block;
  width: 100%;
}
.slide-thumb-btn img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  background: #fff;
  display: block;
}
.slide-empty {
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}
.slide-card-foot {
  margin-top: auto;
  padding: 0.65rem 0.9rem;
  border-block-start: 1px solid var(--border);
  background: var(--surface-alt);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  color: #ffffff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.34rem 0.72rem;
}
.btn-download:hover {
  filter: brightness(1.08);
}
.dl-count {
  font-size: 0.75rem;
  padding: 0.08rem 0.42rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

/* Metrics & Responsive Table (per modern-web-guidance) */
.rate-inputs { gap: 0.9rem; }
.rate-field {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}
.rate-field input {
  width: 5rem;
  padding: 0.32rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  font-family: var(--mono);
}
.note-banner {
  margin: 0;
  background: var(--accent-soft);
  color: #0c3b66;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  font-size: 0.86rem;
}
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.85rem;
}
.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}
.kpi-label { font-size: 0.78rem; color: var(--muted); font-weight: 600; }
.kpi-val { font-size: 1.45rem; font-weight: 700; font-family: var(--mono); margin-block: 0.15rem; }
.kpi-sub { font-size: 0.78rem; color: var(--muted); }

.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  max-block-size: min(560px, 75vh);
  container-type: inline-size;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.88rem;
}
caption {
  text-align: left;
  padding: 0.75rem 1rem;
  font-weight: 700;
  border-block-end: 1px solid var(--border);
  background: var(--surface);
}
thead {
  position: sticky;
  inset-block-start: 0;
  z-index: 2;
  background: var(--surface-alt);
}
th, td {
  padding: 0.62rem 0.85rem;
  text-align: left;
  border-block-end: 1px solid var(--border);
  white-space: nowrap;
}
tbody th {
  position: sticky;
  inset-inline-start: 0;
  background: var(--surface);
  z-index: 1;
  font-weight: 700;
}

@container (width < 640px) {
  table, thead, tbody, tr, th, td { display: block; }
  thead { display: none; }
  tr {
    margin: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }
  tbody th {
    position: sticky;
    inset-block-start: 0;
    z-index: 2;
    background: var(--surface-alt);
  }
  td { white-space: normal; }
  td:nth-child(2)::before { content: "Effort: "; font-weight: 600; color: var(--muted); }
  td:nth-child(3)::before { content: "Duration: "; font-weight: 600; color: var(--muted); }
  td:nth-child(4)::before { content: "Turns: "; font-weight: 600; color: var(--muted); }
  td:nth-child(5)::before { content: "Tool Calls: "; font-weight: 600; color: var(--muted); }
  td:nth-child(6)::before { content: "Revisions: "; font-weight: 600; color: var(--muted); }
  td:nth-child(7)::before { content: "Est. Tokens: "; font-weight: 600; color: var(--muted); }
  td:nth-child(8)::before { content: "Est. Cost: "; font-weight: 600; color: var(--muted); }
}

/* Swarm & Traces */
.traces-layout {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(340px, 1.35fr);
  gap: 1.15rem;
}
@media (max-width: 900px) {
  .traces-layout { grid-template-columns: 1fr; }
}
.traces-layout h2 { margin: 0 0 0.7rem; font-size: 1.05rem; }
.agent-cards, .board-timeline {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  max-block-size: 680px;
  overflow-y: auto;
  padding-inline-end: 0.25rem;
}
.agent-card, .board-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
}
.agent-top, .board-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-block-end: 0.35rem;
}
.agent-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.85rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-block-start: 0.45rem;
}
.tool-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.12rem 0.42rem;
  border-radius: 4px;
  background: var(--surface-alt);
  color: var(--text);
}
.board-text {
  margin: 0.25rem 0 0;
  font-size: 0.84rem;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Modal Dialog (per modern-web-guidance: light-dismiss + scroll containment) */
dialog:modal {
  max-width: min(1100px, 94vw);
  max-height: 92vh;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0;
  background: var(--surface);
  overscroll-behavior: contain;
}
dialog::backdrop {
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(2px);
  overflow: hidden;
  overscroll-behavior: contain;
}
.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-block-end: 1px solid var(--border);
}
.dialog-header h2 { margin: 0; font-size: 1rem; }
.dialog-controls { display: flex; gap: 0.45rem; }
.dialog-body {
  padding: 0.9rem;
  background: #0f172a;
  display: flex;
  justify-content: center;
}
.dialog-body img {
  max-width: 100%;
  max-height: 76vh;
  border-radius: 6px;
}

.site-footer {
  border-block-start: 1px solid var(--border);
  padding-block: 1rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}