/* Serendipic · Arc Spaces live shell
   Visual: Arc glass sidebar + inset card deck + scene skins
   Preserved: detail drawer, atlas 860/220/58vh, lens/figs/badges, bot roster
*/

:root {
  --font: "Source Serif 4", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --display: "Source Serif 4", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --radius-sidebar: 20px;
  --radius-inset: 18px;
  --radius-card: 14px;
  --radius-row: 12px;
  --radius: 14px;
  --radius-sm: 8px;
  --sidebar-w: 268px;
  --glass: rgba(255, 255, 255, 0.12);
  --glass-strong: rgba(255, 255, 255, 0.22);
  --glass-border: rgba(255, 255, 255, 0.14);
  --ink: #f4f2ee;
  --mute: rgba(244, 242, 238, 0.58);
  --soft: rgba(244, 242, 238, 0.78);
  --inset-bg: rgba(18, 20, 28, 0.78);
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.1);
  --accent: #7dd3c7;
  --space-tint: #7dd3c7;
  --shadow-inset: 0 18px 50px rgba(0, 0, 0, 0.28);
  --shadow-row: 0 8px 24px rgba(0, 0, 0, 0.18);
  /* detail panel aliases (live drawer) */
  --bg: #0b0d10;
  --panel: #15181e;
  --text: #eceff4;
  --line: #2a313c;
  --chip: #5ee0c8;
}

/* —— Scene skins —— */
html[data-style="tech"] {
  --g1: #0a1020;
  --g2: #1a3a5c;
  --g3: #0d2840;
  --g4: #142238;
  --accent: #5ee0c8;
  --space-tint: #5ee0c8;
  --chip: #5ee0c8;
  --glass: rgba(12, 22, 38, 0.42);
  --glass-strong: rgba(255, 255, 255, 0.14);
  --inset-bg: rgba(10, 14, 24, 0.82);
  --ink: #eef2f8;
  --mute: rgba(238, 242, 248, 0.55);
  --soft: rgba(238, 242, 248, 0.78);
  --panel: rgba(10, 14, 24, 0.96);
  --text: #eef2f8;
  --line: rgba(255, 255, 255, 0.12);
  --bg: #0a1020;
}

html[data-style="industrial"] {
  --g1: #1a120c;
  --g2: #3d2618;
  --g3: #6b3a1e;
  --g4: #2a1a10;
  --accent: #e09a5a;
  --space-tint: #d4843a;
  --chip: #e09a5a;
  --glass: rgba(40, 24, 14, 0.45);
  --glass-strong: rgba(255, 220, 180, 0.12);
  --inset-bg: rgba(22, 14, 10, 0.84);
  --ink: #f5ebe0;
  --mute: rgba(245, 235, 224, 0.55);
  --soft: rgba(245, 235, 224, 0.78);
  --panel: rgba(22, 14, 10, 0.96);
  --text: #f5ebe0;
  --line: rgba(255, 220, 180, 0.14);
  --bg: #1a120c;
}

html[data-style="stardew"] {
  --g1: #e8f0d8;
  --g2: #c8e0b0;
  --g3: #f0e4c0;
  --g4: #b8d4a8;
  --accent: #4a7c3f;
  --space-tint: #6a9a4a;
  --chip: #4a7c3f;
  --glass: rgba(255, 255, 255, 0.48);
  --glass-strong: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(60, 80, 40, 0.12);
  --inset-bg: rgba(252, 250, 242, 0.88);
  --ink: #2c3420;
  --mute: rgba(44, 52, 32, 0.55);
  --soft: rgba(44, 52, 32, 0.78);
  --card-bg: rgba(255, 255, 255, 0.55);
  --card-border: rgba(60, 80, 40, 0.12);
  --shadow-inset: 0 18px 40px rgba(80, 100, 50, 0.12);
  --shadow-row: 0 6px 18px rgba(60, 80, 40, 0.1);
  --panel: #fbfaf2;
  --text: #2c3420;
  --line: rgba(60, 80, 40, 0.18);
  --bg: #e8f0d8;
}

html[data-style="atlas"] {
  --g1: #060818;
  --g2: #1a1040;
  --g3: #0c2048;
  --g4: #2a1840;
  --accent: #c9a84a;
  --space-tint: #8a9cff;
  --chip: #c9a84a;
  --glass: rgba(10, 12, 32, 0.48);
  --glass-strong: rgba(200, 180, 255, 0.1);
  --inset-bg: rgba(8, 10, 22, 0.86);
  --ink: #f0e8d0;
  --mute: rgba(240, 232, 208, 0.52);
  --soft: rgba(240, 232, 208, 0.78);
  --panel: rgba(8, 10, 22, 0.96);
  --text: #f0e8d0;
  --line: rgba(200, 180, 255, 0.14);
  --bg: #060818;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font: 15px/1.55 var(--font);
  background: #000;
  -webkit-font-smoothing: antialiased;
}
body { position: relative; isolation: isolate; }
button { font: inherit; cursor: pointer; }

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Full-bleed scene ground */
.page-ground {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.page-ground-wash {
  position: absolute;
  inset: -8%;
  background:
    radial-gradient(ellipse 70% 55% at 18% 22%, color-mix(in srgb, var(--g2) 85%, transparent), transparent 60%),
    radial-gradient(ellipse 55% 50% at 88% 78%, color-mix(in srgb, var(--g3) 75%, transparent), transparent 55%),
    linear-gradient(158deg, var(--g1) 0%, var(--g2) 38%, var(--g3) 68%, var(--g4) 100%);
  transition: background 0.45s ease;
}
.page-ground-motif {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    radial-gradient(circle at 20% 30%, color-mix(in srgb, var(--accent) 18%, transparent) 0 1px, transparent 1.5px),
    radial-gradient(circle at 70% 60%, color-mix(in srgb, var(--space-tint) 14%, transparent) 0 1px, transparent 1.5px);
  background-size: 48px 48px, 72px 72px;
  mix-blend-mode: soft-light;
}
html[data-style="stardew"] .page-ground-motif {
  opacity: 0.22;
  mix-blend-mode: multiply;
  background-image: radial-gradient(circle at 30% 40%, rgba(90, 130, 60, 0.12) 0 2px, transparent 3px);
  background-size: 56px 56px;
}
html[data-style="atlas"] .page-ground-motif {
  opacity: 0.5;
  background-image:
    radial-gradient(1.5px 1.5px at 10% 20%, rgba(255, 230, 180, 0.55), transparent),
    radial-gradient(1px 1px at 40% 70%, rgba(180, 200, 255, 0.45), transparent),
    radial-gradient(1.5px 1.5px at 80% 30%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1px 1px at 65% 85%, rgba(200, 160, 255, 0.35), transparent);
  background-size: 100% 100%;
}
.page-ground-grain {
  position: absolute;
  inset: 0;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* Shell */
.app-shell {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 14px;
  min-height: 100vh;
  padding: 14px;
  max-width: 1440px;
  margin: 0 auto;
}

/* Glass Spaces sidebar */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-sidebar);
  background: var(--glass);
  backdrop-filter: blur(22px) saturate(1.35);
  -webkit-backdrop-filter: blur(22px) saturate(1.35);
  border: 1px solid var(--glass-border);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 12px 40px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}
.sidebar-header {
  padding: 20px 18px 14px;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
}
.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.logo {
  display: inline-block;
  font-family: var(--font);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.logo-sub {
  margin: 8px 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--mute);
  line-height: 1.45;
}
.bot-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 5px;
  align-items: center;
}
.bot-roster li { margin: 0; line-height: 0; }
.bot-roster img {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  background: color-mix(in srgb, var(--glass-strong) 50%, transparent);
  display: block;
  animation: bot-bob 2.8s ease-in-out infinite;
}
.bot-roster li:nth-child(2) img { animation-delay: .35s; }
.bot-roster li:nth-child(3) img { animation-delay: .7s; }
.bot-roster li:nth-child(4) img { animation-delay: 1.05s; }
@keyframes bot-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2px); }
}
@media (prefers-reduced-motion: reduce) {
  .bot-roster img { animation: none; }
}

.sidebar-content {
  flex: 1;
  padding: 14px 12px 8px;
  overflow-y: auto;
}
.sidebar-group-label {
  margin: 0 8px 10px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}
.space-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.space-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: var(--radius-row);
  background: transparent;
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}
.space-row:hover {
  background: color-mix(in srgb, var(--glass-strong) 70%, transparent);
}
.space-row.active {
  background: var(--glass-strong);
  box-shadow: var(--shadow-row);
  transform: translateY(-1px);
}
.space-glyph {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  background: color-mix(in srgb, var(--space-tint) 28%, transparent);
  border: 1px solid color-mix(in srgb, var(--space-tint) 35%, transparent);
  flex-shrink: 0;
}
.space-row.active .space-glyph {
  background: color-mix(in srgb, var(--accent) 45%, transparent);
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
}
.space-text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.space-label {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
}
.space-en {
  font-size: 0.7rem;
  color: var(--mute);
  letter-spacing: 0.02em;
}

.sidebar-footer {
  padding: 12px 14px 16px;
  border-top: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
}
.skin-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}
.skin-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.skin-btn {
  padding: 7px 8px;
  border-radius: 9px;
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  background: color-mix(in srgb, var(--glass-strong) 40%, transparent);
  color: var(--soft);
  font: inherit;
  font-size: 0.72rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.skin-btn:hover {
  background: color-mix(in srgb, var(--glass-strong) 80%, transparent);
}
.skin-btn.on {
  background: color-mix(in srgb, var(--accent) 28%, transparent);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  color: var(--ink);
  font-weight: 600;
}

/* Inset */
.inset {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-inset);
  background: var(--inset-bg);
  backdrop-filter: blur(16px) saturate(1.15);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-inset), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.inset-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px 14px;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
  flex-wrap: wrap;
}
.inset-heading { min-width: 0; flex: 1; }
.inset-title {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.inset-title .en {
  margin-left: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--mute);
  letter-spacing: 0.02em;
}
.inset-hint {
  margin: 6px 0 0;
  font-size: 0.78rem;
  color: var(--mute);
}
.inset-tools {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}
.search { min-width: 180px; max-width: 240px; width: 100%; }
.search input {
  width: 100%;
  background: color-mix(in srgb, var(--glass-strong) 35%, transparent);
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  color: var(--ink);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
}
.search input::placeholder { color: var(--mute); }

.sort {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}
.sort[hidden] { display: none; }
.sort span { color: var(--mute); font-size: 12px; margin-right: 2px; }
.sort button {
  flex: 0 0 auto;
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  background: transparent;
  color: var(--mute);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
}
.sort button.on {
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 28%, transparent);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
}

.cols {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 24px 0;
}
.cols[hidden] { display: none; }
.cols button {
  flex: 0 0 auto;
  border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent);
  background: transparent;
  color: var(--accent);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
}
.cols button.on {
  color: var(--bg);
  background: var(--accent);
}

.card-deck {
  flex: 1;
  padding: 20px 24px 28px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
  align-content: start;
  overflow-y: auto;
}
.empty {
  color: var(--mute);
  text-align: center;
  padding: 48px 8px;
  margin: 0;
}
.empty-deck {
  grid-column: 1 / -1;
  padding: 48px 24px;
  text-align: center;
  color: var(--mute);
  font-size: 0.9rem;
}

/* Cards (Arc deck + live applyCover .pic) */
.card {
  grid-column: span 4;
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-card);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  overflow: hidden;
  cursor: pointer;
  color: inherit;
  text-align: left;
  padding: 0;
  font: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.2);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--card-border));
}
.card.featured {
  grid-column: span 8;
  grid-row: span 2;
  flex-direction: row;
  min-height: 280px;
}
.card .pic,
.card-media {
  position: relative;
  overflow: hidden;
  background: color-mix(in srgb, var(--g1) 80%, #000);
  background-size: cover;
  background-position: center;
}
.card:not(.featured) .pic,
.card:not(.featured) .card-media {
  aspect-ratio: 16 / 10;
}
.card.featured .pic,
.card.featured .card-media {
  flex: 0 0 48%;
  min-height: 100%;
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.card-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.card.featured .card-body {
  padding: 22px 24px;
  justify-content: center;
}
.card h2,
.card-title {
  margin: 0;
  padding: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.card.featured .card-title,
.card.featured h2 {
  font-size: 1.35rem;
  line-height: 1.3;
}
.card-kicker {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.card-dek {
  margin: 4px 0 0;
  font-size: 0.88rem;
  color: var(--soft);
  line-height: 1.5;
}
.card .meta,
.card-meta {
  margin-top: auto;
  padding-top: 10px;
  font-size: 0.72rem;
  color: var(--mute);
  letter-spacing: 0.04em;
}
.card > h2 { padding: 10px 12px 4px; }
.card > .meta { padding: 0 12px 12px; }

.badge {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 1;
  font-size: 10px;
  letter-spacing: .08em;
  font-weight: 650;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(8, 9, 12, .78);
  color: #efe6c9;
  border: 1px solid #e8c36a88;
}
.badge.llm { color: #8bb4ff; border-color: #8bb4ff88; }
.badge.context { color: #f0c36a; border-color: #f0c36a88; }
.badge.harness { color: #7dd3c0; border-color: #7dd3c088; }
.badge.mixed { color: #d4a1ff; border-color: #d4a1ff88; }

.hang-bar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}
.hang-back {
  border: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  background: transparent;
  color: var(--ink);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
}
.hang-back:hover { border-color: var(--accent); }
.hang-bar span { color: var(--mute); font-size: 13px; }

/* —— Detail drawer + atlas (LIVE invariants) —— */
.mask { position: fixed; inset: 0; background: rgba(0, 0, 0, .45); z-index: 30; }
.detail {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(460px, 100vw);
  background: var(--panel);
  color: var(--text);
  z-index: 31;
  overflow: auto;
  border-left: 1px solid var(--line);
}
.detail .x {
  position: sticky;
  top: 10px;
  float: right;
  margin: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  border-radius: 999px;
  padding: 4px 10px;
}
.detail .hero {
  aspect-ratio: 16 / 9;
  background-size: cover;
  background-position: center;
}
.detail .body { padding: 18px 20px 40px; }
.kicker {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 6px;
}
.detail h1 {
  font-size: 22px;
  margin: 0 0 12px;
  font-family: var(--display);
  font-weight: 600;
  color: var(--text);
}
.detail a { color: var(--accent); }
.why { color: var(--mute); font-size: 13px; }
.detail.has-atlas { width: min(860px, 100vw); }
.detail.has-atlas .hero { aspect-ratio: 16 / 9; max-height: 220px; }
.atlas-box {
  margin: 4px 0 20px;
  border: 1px solid var(--line);
  padding: 10px;
  border-radius: var(--radius-sm);
}
.atlas-box .kicker { margin-bottom: 8px; }
.atlas-frame {
  display: block;
  width: 100%;
  height: min(58vh, 560px);
  border: 0;
  border-radius: 8px;
  background: #05060a;
}
.atlas-preview {
  height: 180px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 30% 40%, #e8c36a55, transparent 40%),
    radial-gradient(circle at 70% 60%, #6a8cff44, transparent 45%),
    #05060a;
  position: relative;
  overflow: hidden;
}
.atlas-preview::after {
  content: "✦  星图预览  ·  点星体看细节";
  position: absolute;
  inset: auto 12px 10px;
  color: #e8c36a;
  font-size: 12px;
  letter-spacing: .12em;
}
.atlas-box > p { margin: 8px 0 0; }

.figs { display: flex; flex-direction: column; gap: 10px; margin: 14px 0; }
.figs img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
}
.part-chip {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 11px;
  letter-spacing: .08em;
  margin: 0 0 12px;
}
.lens .beat { margin: 0 0 14px; }
.lens .en { color: var(--mute); font-size: 13px; margin-top: 4px; }

@media (max-width: 1100px) {
  .card.featured { grid-column: span 12; flex-direction: column; min-height: 0; }
  .card.featured .pic,
  .card.featured .card-media { flex: none; aspect-ratio: 16 / 9; }
  .card { grid-column: span 6; }
}
@media (max-width: 820px) {
  .app-shell { flex-direction: column; padding: 10px; }
  .sidebar { width: 100%; }
  .space-list { flex-direction: row; flex-wrap: wrap; }
  .space-row { flex: 1 1 140px; }
  .card { grid-column: span 12; }
  .inset-header { flex-direction: column; align-items: stretch; }
  .inset-tools { align-items: stretch; }
  .search { max-width: none; }
}