:root {
  --bg0: #141210;
  --panel: #f2eee5;
  --ink: #1a1712;
  --muted: #6b6358;
  --line: #d4ccbe;
  --accent: #c45c26;
  --accent2: #2f6f4e;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg0);
}
.bg {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(800px 420px at 8% -8%, #3a2f22 0%, transparent 55%),
    radial-gradient(700px 380px at 92% 0%, #1e3328 0%, transparent 50%),
    linear-gradient(160deg, #12100d, #221c16 45%, #0e0d0b);
}

.top {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 18px 28px; color: #f6f1e7;
}
.brand { display: flex; gap: 12px; align-items: center; }
.mark {
  width: 44px; height: 44px; display: grid; place-items: center;
  background: var(--accent2); color: #fff;
  font-family: "IBM Plex Mono", monospace; font-weight: 600;
}
.brand strong { display: block; font-size: 1.25rem; }
.brand em { font-style: normal; color: #cbbfae; font-size: 0.85rem; }
.top-actions { display: flex; gap: 10px; }

.layout {
  display: grid;
  grid-template-columns: minmax(300px, 400px) 1fr;
  gap: 18px;
  padding: 0 22px 28px;
  min-height: calc(100vh - 90px);
}
.panel {
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 20px;
}
.side h1 { margin: 0 0 6px; font-size: 1.45rem; letter-spacing: -0.02em; }
.lead { margin: 0 0 16px; color: var(--muted); font-size: 0.92rem; }
.side a { color: var(--accent2); }

.search { display: grid; gap: 6px; margin-bottom: 14px; font-size: 0.82rem; color: var(--muted); }
.search input, input[type="search"] {
  font: inherit; color: var(--ink);
  border: 1px solid var(--line); background: #fffdf8;
  padding: 10px 12px; width: 100%;
}

.section-label {
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--muted); margin: 10px 0 6px;
}
.cat-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.cat-tabs button {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 6px 10px; cursor: pointer; font: inherit; font-size: 0.78rem;
}
.cat-tabs button.active { background: #1f1a15; color: #f6f1e7; border-color: #1f1a15; }

.table-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin: 14px 0 8px;
}
.table-head h2 { margin: 0; font-size: 1rem; }
.muted { color: var(--muted); font-size: 0.85rem; }

.model-list {
  display: flex; flex-direction: column; gap: 8px;
  max-height: calc(100vh - 380px);
  overflow: auto;
  padding-right: 4px;
}
.model-card {
  border: 1px solid var(--line);
  background: #fff;
  padding: 0;
  cursor: pointer;
  text-align: left;
  font: inherit;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 0;
  overflow: hidden;
}
.model-card:hover, .model-card.active { border-color: var(--accent); }
.model-card .thumb {
  width: 72px; height: 72px; background: #efe8da;
  display: grid; place-items: center; overflow: hidden;
}
.model-card .thumb-img {
  width: 64px; height: 64px; object-fit: contain; display: block;
}
.model-card .thumb-placeholder {
  font-size: 0.7rem; font-weight: 700; color: var(--muted);
}
.model-card .info { padding: 8px 10px; }
.model-card strong { display: block; font-size: 0.88rem; margin-bottom: 2px; }
.model-card span { color: var(--muted); font-size: 0.74rem; line-height: 1.3; }

.viewer { display: flex; flex-direction: column; min-height: 560px; }
.viewer-head {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-bottom: 12px;
}
.viewer-head h2 { margin: 0 0 4px; font-size: 1.25rem; }
.fmt-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: flex-start; }
.fmt-badge {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.04em;
  padding: 3px 8px; border: 1px solid var(--line); background: #fff; color: var(--muted);
}
.fmt-badge.fmt-svg { color: #2f6f4e; border-color: #9bc4a8; }
.fmt-badge.fmt-dxf { color: #1a5f8a; border-color: #8ec0e0; }
.fmt-badge.fmt-stl { color: #7a4b12; border-color: #d4a86a; }
.fmt-badge.fmt-cdr { color: #0b6e4f; border-color: #8fd0b8; }
.fmt-badge.fmt-ai { color: #9a3412; border-color: #f0b090; }
.fmt-badge.fmt-zip, .fmt-badge.fmt-rar { color: #5a3d8a; border-color: #b8a0e0; }
.th-badge {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.03em;
  padding: 3px 8px; border: 1px solid #c4d4b8; background: #eef5ea; color: #2f6f4e;
}
.th-badge.th-unknown {
  border-color: var(--line); background: #fff; color: var(--muted); font-weight: 500;
}

.preview-tabs { display: flex; gap: 6px; margin-bottom: 8px; }
.preview-tabs button {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 6px 10px; cursor: pointer; font: inherit; font-size: 0.8rem;
}
.preview-tabs button.active { background: var(--accent2); border-color: var(--accent2); color: #fff; }
.preview-tabs button:disabled { opacity: 0.4; cursor: not-allowed; }

.stage {
  position: relative;
  flex: 1;
  min-height: min(68vh, 620px);
  border: 1px solid var(--line);
  background: #f7f2e8;
  overflow: hidden;
}
.stage-grid {
  position: absolute; inset: 0; pointer-events: none; opacity: 0.35;
  background-image:
    linear-gradient(#c4b8a2 1px, transparent 1px),
    linear-gradient(90deg, #c4b8a2 1px, transparent 1px);
  background-size: 20px 20px;
}
.preview-box {
  position: relative; z-index: 1;
  width: 100%; height: 100%;
  min-height: min(68vh, 620px);
  display: grid; place-items: center;
  padding: 18px;
}
.preview-box .preview-geom,
.preview-box .preview-photo {
  width: 100%;
  height: 100%;
  max-height: min(68vh, 620px);
  object-fit: contain;
  display: block;
}
.preview-msg {
  max-width: 420px;
  text-align: center;
  line-height: 1.45;
  margin: 0;
}

.viewer-foot { margin-top: 12px; }
.files-title { margin: 0 0 8px; font-size: 0.95rem; }
.downloads { margin-bottom: 8px; }
.file-row {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--line);
}
.file-name {
  font-family: "IBM Plex Mono", monospace; font-size: 0.8rem;
  min-width: 140px; flex: 1;
}

.btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 8px 12px; cursor: pointer; font: inherit; text-decoration: none;
  display: inline-flex; align-items: center;
}
.btn.ghost { background: transparent; color: #f6f1e7; border-color: #5a5044; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.small { padding: 6px 10px; font-size: 0.82rem; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .model-list { max-height: 280px; }
  .stage { min-height: 360px; }
}