/* 3d4.life — site styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0b0d12;
  --bg-2: #11141c;
  --bg-3: #161a24;
  --bg-4: #1d2230;
  --line: #262b3a;
  --line-2: #323849;
  --txt: #e6e9f2;
  --txt-2: #9aa1b6;
  --txt-3: #5a6079;
  --accent: #7c5cff;
  --accent-2: #00d4c8;
  --accent-glow: rgba(124, 92, 255, 0.25);
  --good: #2bd4a4;
  --warn: #ffb547;
  --bad: #ff5577;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(0,0,0,0.35);
}

html, body { height: 100%; }
body {
  background: radial-gradient(ellipse at top, #1a1d2e 0%, var(--bg) 50%) fixed;
  color: var(--txt);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: #6effe6; }

img { max-width: 100%; display: block; }

button, .btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  background: var(--bg-3);
  color: var(--txt);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
button:hover, .btn:hover {
  background: var(--bg-4);
  border-color: var(--line-2);
  transform: translateY(-1px);
}
button.primary, .btn.primary {
  background: linear-gradient(135deg, var(--accent), #5a3fdb);
  border-color: transparent;
  box-shadow: 0 4px 16px var(--accent-glow);
}
button.primary:hover, .btn.primary:hover {
  filter: brightness(1.1);
}
button.ghost, .btn.ghost {
  background: transparent;
}

input[type="text"], input[type="file"], textarea, select {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  background: var(--bg-2);
  color: var(--txt);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  transition: border-color 0.15s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
textarea { resize: vertical; min-height: 90px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--txt-2);
  margin-bottom: 6px;
  margin-top: 14px;
  letter-spacing: 0.02em;
}
label:first-child { margin-top: 0; }

/* === HEADER === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 13, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--txt);
}
.brand .logo {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: #0b0d12;
  font-weight: 800;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  color: var(--txt-2);
  font-weight: 500;
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.15s;
}
.nav-links a:hover {
  color: var(--txt);
  background: var(--bg-3);
}
.nav-links a.cta {
  color: var(--txt);
  background: linear-gradient(135deg, var(--accent), #5a3fdb);
  margin-left: 8px;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.nav-links a.cta:hover { filter: brightness(1.1); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  padding: 8px 10px;
}

/* === LAYOUT === */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}
.container.narrow { max-width: 760px; }

h1 { font-size: 36px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; }
h2 { font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 17px; font-weight: 600; }

.muted { color: var(--txt-2); }
.dim { color: var(--txt-3); }
.mono { font-family: 'JetBrains Mono', monospace; }

.row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }

/* === HERO === */
.hero {
  position: relative;
  padding: 80px 24px 64px;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -50%; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  background: linear-gradient(135deg, #fff 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.hero p {
  font-size: 18px;
  color: var(--txt-2);
  max-width: 620px;
  margin: 0 auto 32px;
}
.hero .row { justify-content: center; }

.stat-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 560px;
  margin: 40px auto 0;
}
.stat {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.stat .v { font-size: 24px; font-weight: 700; color: var(--accent-2); font-family: 'JetBrains Mono', monospace; }
.stat .k { font-size: 12px; color: var(--txt-3); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 4px; }

/* === GRID OF CARDS === */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.section-head h2 { margin: 0; }
.section-head .muted { font-size: 14px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.35), 0 0 0 1px var(--accent-glow);
}
.card a.thumb {
  display: block;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, var(--bg-3), var(--bg-4));
  position: relative;
  overflow: hidden;
}
.card .thumb-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.card .thumb-fallback {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--txt-3);
}
.card .body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.card .title {
  font-weight: 600;
  color: var(--txt);
  font-size: 15px;
  line-height: 1.3;
}
.card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--txt-3);
  margin-top: auto;
  padding-top: 8px;
}
.card .badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-glow);
  color: var(--accent-2);
}
.card .badge.proj {
  background: rgba(43, 212, 164, 0.12);
  color: var(--good);
}

/* === STL/PROJECT PAGE === */
.detail {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
  margin-top: 16px;
}
@media (max-width: 980px) {
  .detail { grid-template-columns: 1fr; }
}

.viewer-wrap {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  min-height: 500px;
  display: flex;
  flex-direction: column;
}
.viewer-canvas {
  width: 100%;
  flex: 1;
  min-height: 500px;
  display: block;
}
.viewer-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-3);
  border-top: 1px solid var(--line);
  align-items: center;
}
.viewer-toolbar button {
  font-size: 12px;
  padding: 7px 12px;
  border-radius: 8px;
}
.viewer-toolbar .spacer { flex: 1; }
.viewer-info {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(11, 13, 18, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--txt-2);
  pointer-events: none;
  max-width: 280px;
}
.viewer-info .label { color: var(--txt-3); }
.viewer-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(11, 13, 18, 0.7);
  backdrop-filter: blur(4px);
  z-index: 5;
  font-size: 14px;
  color: var(--txt-2);
}
.viewer-loading.hidden { display: none; }
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--line-2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.panel {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.panel h3 {
  margin-bottom: 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--txt-3);
}
.panel .title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.panel .author {
  font-size: 13px;
  color: var(--txt-2);
  margin-bottom: 14px;
}
.panel .desc {
  font-size: 14px;
  color: var(--txt-2);
  line-height: 1.6;
  margin-bottom: 16px;
  white-space: pre-wrap;
}
.panel .stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}
.panel .stat-mini {
  background: var(--bg-3);
  border-radius: 8px;
  padding: 10px 12px;
}
.panel .stat-mini .k {
  font-size: 11px;
  color: var(--txt-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.panel .stat-mini .v {
  font-size: 16px;
  font-weight: 600;
  color: var(--txt);
  font-family: 'JetBrains Mono', monospace;
}
.panel .download-btn {
  width: 100%;
  justify-content: center;
  padding: 12px;
  font-size: 15px;
}

.parts-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  max-height: 480px;
  overflow-y: auto;
  padding-right: 4px;
}
.parts-list .part-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: var(--bg-3);
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.1s;
}
.parts-list .part-row:hover {
  background: var(--bg-4);
  border-color: var(--line-2);
}
.parts-list .part-row.active {
  border-color: var(--accent);
  background: var(--bg-4);
}
.parts-list .part-row .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.parts-list .part-row .swatch {
  width: 12px; height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}
.parts-list .part-row .size {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--txt-3);
}

/* === UPLOAD FORM === */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 24px;
}
.tabs button {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  color: var(--txt-2);
  font-weight: 600;
}
.tabs button.active {
  background: var(--bg-4);
  color: var(--txt);
}
.tabs button:hover { background: var(--bg-3); transform: none; }

.upload-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.dropzone {
  border: 2px dashed var(--line-2);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  transition: all 0.15s;
  cursor: pointer;
  background: var(--bg-3);
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: var(--bg-4);
}
.dropzone .icon { font-size: 36px; margin-bottom: 8px; opacity: 0.6; }
.dropzone .hint { color: var(--txt-3); font-size: 13px; margin-top: 4px; }
.dropzone input[type="file"] { display: none; }

.file-list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.file-list .f {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-3);
  border-radius: 8px;
  font-size: 13px;
}
.file-list .f .x {
  color: var(--bad);
  cursor: pointer;
  font-weight: 700;
  padding: 0 8px;
}

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 14px;
}
.alert.err { background: rgba(255, 85, 119, 0.12); border: 1px solid var(--bad); color: #ffb3c2; }
.alert.ok  { background: rgba(43, 212, 164, 0.12); border: 1px solid var(--good); color: #b3f1d9; }

/* === FOOTER === */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px;
  text-align: center;
  color: var(--txt-3);
  font-size: 13px;
  margin-top: 48px;
}

.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--txt-3);
}
.empty h3 { color: var(--txt-2); margin-bottom: 8px; font-size: 18px; }

/* === MOBILE === */
@media (max-width: 720px) {
  h1 { font-size: 28px; }
  .nav { padding: 12px 16px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px;
    gap: 2px;
  }
  .nav-links.open a { padding: 12px 14px; }
  .menu-toggle { display: inline-flex; }
  .container { padding: 24px 16px 60px; }
  .hero { padding: 48px 16px 32px; }
  .stat-bar { grid-template-columns: 1fr; max-width: 100%; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
  .card .body { padding: 10px 12px; }
  .viewer-wrap, .viewer-canvas { min-height: 360px; }
  .viewer-info { font-size: 11px; max-width: 200px; }
  .upload-card { padding: 18px; }
  .dropzone { padding: 32px 16px; }
}