/* SketchUp2Render — single stylesheet, dark theme. */
:root {
  --bg: #101216;
  --bg-raised: #171a20;
  --bg-panel: #1c2028;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --text-muted: #9aa1b0;
  --accent: #e8a33d;
  --accent-ink: #1a1206;
  --danger: #e05d5d;
  --success: #58c78a;
  --radius: 10px;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.45;
}
img { max-width: 100%; display: block; }
h2 { font-size: 22px; margin: 0; }
h3 { font-size: 16px; margin: 0 0 10px; }
a { color: var(--accent); text-decoration: none; }
pre { white-space: pre-wrap; }

/* ---------- nav ---------- */
.topnav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-raised);
  position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; font-size: 17px; color: var(--text); letter-spacing: 0.2px; }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 18px; }
.nav-links a { color: var(--text-muted); font-weight: 500; }
.nav-links a.active, .nav-links a:hover { color: var(--text); }

main { max-width: 1280px; margin: 0 auto; padding: 24px 22px 80px; }

.view-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; gap: 12px; flex-wrap: wrap;
}
.header-actions { display: flex; gap: 10px; align-items: center; }

.muted { color: var(--text-muted); }
.small { font-size: 12.5px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
.warn-text { color: #d9a441; }
.row-gap { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 12px; }

/* ---------- buttons & inputs ---------- */
.btn {
  background: var(--bg-panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 14px; font-size: 14px; font-family: var(--font);
  cursor: pointer; transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.btn:hover { border-color: #3a4150; background: #232834; }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { background: #f0b155; border-color: #f0b155; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; font-weight: 600; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-xs { padding: 2px 7px; font-size: 11.5px; }
.btn-lg { padding: 12px 22px; font-size: 15.5px; }
.btn-danger-text { color: var(--danger); }

.text-input, .text-area, .model-select {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 11px; font-size: 14px; font-family: var(--font);
}
.text-area { resize: vertical; min-height: 60px; }
.text-input:focus, .text-area:focus, .model-select:focus {
  outline: none; border-color: var(--accent);
}
.model-select { width: auto; }
.num-input { width: 130px; }
.field-label { display: block; font-size: 12.5px; color: var(--text-muted); margin: 12px 0 5px; }
.radio-label { display: inline-flex; align-items: center; gap: 6px; color: var(--text); font-size: 13.5px; cursor: pointer; }

.panel {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; margin-bottom: 18px;
}
.panel-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }

.chip {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  background: var(--bg-panel); border: 1px solid var(--border);
  font-size: 11.5px; color: var(--text-muted);
}
.chip.warn { color: #d9a441; border-color: #6b5320; }
.model-chip {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  background: hsl(var(--model-hue, 210), 45%, 22%);
  color: hsl(var(--model-hue, 210), 70%, 78%);
  border: 1px solid hsl(var(--model-hue, 210), 40%, 34%);
}
.cost-pill {
  padding: 3px 11px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: #26301f; color: #a4d17a; border: 1px solid #3c4d2e;
}

/* ---------- library ---------- */
.library-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.session-card {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
}
.session-card.broken { padding: 16px; }
.session-thumb-link { display: block; aspect-ratio: 16/10; background: var(--bg-panel); }
.session-thumb { width: 100%; height: 100%; object-fit: cover; }
.session-card-body { padding: 12px 14px 14px; }
.session-name { font-weight: 600; color: var(--text); display: block; margin-bottom: 6px; }
.session-meta { display: flex; gap: 10px; align-items: center; font-size: 12.5px; color: var(--text-muted); flex-wrap: wrap; }
.session-card-actions { display: flex; gap: 4px; margin-top: 10px; }

.empty-state {
  text-align: center; padding: 70px 20px; color: var(--text-muted);
  border: 1px dashed var(--border); border-radius: var(--radius);
}
.empty-state .btn { margin-top: 14px; }

/* ---------- new session ---------- */
.dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 80px 24px; text-align: center; cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.drag, .dropzone:hover { border-color: var(--accent); background: #191b14; }
.dropzone-title { font-size: 18px; font-weight: 600; margin: 0 0 6px; }
.dropzone p { margin: 4px 0; }

.new-session-layout { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 18px; }
@media (max-width: 900px) { .new-session-layout { grid-template-columns: 1fr; } }
.crop-preview {
  width: 100%; border-radius: 8px; border: 1px solid var(--border);
  cursor: grab; touch-action: none; background: var(--bg);
}
.crop-preview:active { cursor: grabbing; }
.framing-controls { margin-top: 12px; }
.framing-row { display: flex; gap: 14px; align-items: center; margin-top: 10px; }
.framing-row input[type="range"] { flex: 1; }
.ar-picker { display: flex; flex-wrap: wrap; gap: 6px; }
.ar-btn {
  background: var(--bg); border: 1px solid var(--border); color: var(--text-muted);
  border-radius: 7px; padding: 5px 11px; font-size: 13px; cursor: pointer;
}
.ar-btn.selected { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.sys-prompt-peek { margin-top: 14px; font-size: 13px; }
.sys-prompt-peek summary { cursor: pointer; color: var(--text-muted); }
.sys-prompt-text {
  max-height: 200px; overflow-y: auto; background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
  font-size: 12px; color: var(--text-muted);
}
.go-row { display: flex; align-items: center; gap: 14px; margin-top: 18px; flex-wrap: wrap; }

/* ---------- session header ---------- */
.session-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 18px; flex-wrap: wrap;
}
.session-title { flex: 0 1 auto; font-size: 19px; }

/* ---------- fanout grid ---------- */
.fanout-header { margin-bottom: 14px; }
.fanout-prompt { color: var(--text-muted); font-style: italic; margin: 4px 0; }
.fanout-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}
.gen-card {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  border-top: 3px solid hsl(var(--model-hue, 210), 55%, 45%);
  display: flex; flex-direction: column;
}
.gen-card-head { display: flex; gap: 8px; align-items: center; padding: 10px 12px; }
.gen-card-body { flex: 1; min-height: 180px; display: flex; align-items: center; justify-content: center; padding: 0; }
.gen-card-body.waiting, .gen-card-body.failed {
  flex-direction: column; gap: 10px; padding: 24px 16px; text-align: center;
}
.gen-img { width: 100%; height: 100%; object-fit: cover; cursor: zoom-in; }
.gen-card-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px; border-top: 1px solid var(--border);
}
.gen-error { color: var(--danger); font-size: 13px; margin: 0; }
.elapsed { font-variant-numeric: tabular-nums; color: var(--text-muted); font-size: 14px; }
.fanout-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 16px; padding: 12px 14px;
  background: var(--bg-raised); border: 1px solid var(--border); border-radius: var(--radius);
  position: sticky; bottom: 12px;
}

.spinner {
  width: 26px; height: 26px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}
.spinner-sm { width: 14px; height: 14px; border-width: 2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- thread ---------- */
.thread-view { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 18px; }
@media (max-width: 980px) { .thread-view { grid-template-columns: 1fr; } .thread-rail { order: 2; } }
.thread-rail { max-height: calc(100vh - 160px); overflow-y: auto; padding-right: 4px; }
.timeline-row {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 12px; margin-bottom: 10px;
}
.timeline-row-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.timeline-prompt { font-size: 12.5px; color: var(--text-muted); margin: 6px 0 2px; }
.timeline-thumbs { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.tl-thumb {
  width: 84px; border-radius: 7px; overflow: hidden; cursor: pointer;
  border: 2px solid transparent; background: var(--bg-panel);
  position: relative; text-align: center;
}
.tl-thumb img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.tl-thumb.winner { border-color: hsl(var(--model-hue, 210), 60%, 55%); }
.tl-thumb.active { border-color: var(--accent); }
.tl-thumb.shown { outline: 2px solid var(--text); outline-offset: 1px; }
.tl-thumb.failed { opacity: 0.7; }
.tl-thumb-status {
  aspect-ratio: 4/3; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 4px;
}
.tl-thumb-label {
  display: block; font-size: 10.5px; color: var(--text-muted); padding: 2px 0 3px;
}

.thread-hero {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 14px;
}
.hero-img { width: 100%; max-height: 62vh; object-fit: contain; background: var(--bg); cursor: zoom-in; }
.hero-bar {
  display: flex; gap: 10px; align-items: center; padding: 10px 14px;
  border-top: 1px solid var(--border); flex-wrap: wrap;
}

.ledger-panel {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 16px; margin-bottom: 14px;
  font-size: 13.5px;
}
.ledger-panel summary { cursor: pointer; color: var(--text-muted); font-weight: 600; }
.ledger-list { margin: 10px 0; padding-left: 22px; }
.ledger-list li { margin-bottom: 6px; color: var(--text-muted); }

.composer {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px;
  position: sticky; bottom: 12px; box-shadow: var(--shadow);
}
.composer-row { display: flex; gap: 12px; align-items: flex-end; }
@media (max-width: 700px) { .composer-row { flex-direction: column; align-items: stretch; } }
.composer-input { flex: 1; }
.composer-controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.fresh-nudge {
  display: flex; gap: 10px; align-items: center; justify-content: space-between;
  background: #2a2413; border: 1px solid #6b5320; color: #d9a441;
  border-radius: 8px; padding: 8px 12px; margin-bottom: 10px; font-size: 13px;
}

/* ---------- settings ---------- */
.key-row { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.key-row .text-input { flex: 1; }
.model-panels { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.model-panel {
  border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px;
  border-top: 3px solid hsl(var(--model-hue, 210), 55%, 45%);
  background: var(--bg-panel);
}
.model-panel-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.param-fields { margin-top: 4px; }
.param-field { margin-bottom: 8px; }
.param-field .muted { display: block; margin-top: 3px; }
.storage-meter { margin: 8px 0; }
.storage-bar {
  height: 8px; border-radius: 999px; background: var(--bg);
  border: 1px solid var(--border); overflow: hidden; margin-bottom: 6px;
}
.storage-fill { height: 100%; background: var(--accent); }

/* ---------- toast / modal / banner / lightbox ---------- */
#toast-root { position: fixed; bottom: 18px; right: 18px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg-panel); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 10px 16px; font-size: 14px; box-shadow: var(--shadow);
  max-width: 360px; animation: slide-in 0.2s ease-out;
}
.toast-error { border-color: var(--danger); }
.toast-success { border-color: var(--success); }
.toast-out { opacity: 0; transition: opacity 0.5s; }
@keyframes slide-in { from { transform: translateY(8px); opacity: 0; } }

.modal-overlay, .lightbox-overlay {
  position: fixed; inset: 0; background: rgba(8, 9, 12, 0.75);
  display: flex; align-items: center; justify-content: center; z-index: 90;
  padding: 20px;
}
.modal {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 22px; max-width: 560px; width: 100%;
  box-shadow: var(--shadow); max-height: 85vh; overflow-y: auto;
}
.modal h3 { margin-bottom: 12px; }
.modal-body { color: var(--text-muted); font-size: 14px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; }

.lightbox-overlay { flex-direction: column; gap: 12px; z-index: 95; }
.lightbox-img { max-width: 94vw; max-height: 84vh; object-fit: contain; border-radius: 6px; }
.lightbox-bar { display: flex; gap: 12px; align-items: center; }
.lightbox-caption { color: var(--text-muted); font-size: 13.5px; }

#banner-root { position: sticky; top: 0; z-index: 30; }
.banner {
  display: flex; gap: 12px; align-items: center; justify-content: center;
  padding: 9px 40px 9px 16px; font-size: 13.5px; position: relative;
}
.banner-info { background: #1d2733; color: #9cc4ea; border-bottom: 1px solid #2c4159; }
.banner-error { background: #33201d; color: #eaa49c; border-bottom: 1px solid #59332c; }
.banner-action { font-weight: 600; text-decoration: underline; color: inherit; }
.banner-close {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: inherit; font-size: 18px; cursor: pointer;
}