:root {
  --bg: #0f0f12;
  --surface: #1a1a22;
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --accent: #a855f7;
  --accent2: #ec4899;
  --border: #27272a;
  --danger: #ef4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
.hidden { display: none !important; }
a { color: var(--accent); text-decoration: none; }

.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: rgba(15,15,18,0.9); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--border);
}
.logo { font-weight: 700; font-size: 1.15rem; cursor: pointer; background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; gap: 10px; }

.btn {
  padding: 9px 18px; border-radius: 8px; font-size: 0.9rem; font-weight: 500; cursor: pointer; border: none;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; }
.btn-ghost { background: var(--surface); color: var(--text); border: 1px solid var(--border); }

.hero { padding: 48px 24px 32px; text-align: center; }
.hero h1 { font-size: 2rem; margin-bottom: 8px; }
.hero p { color: var(--muted); }

.gallery {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 4px; max-width: 960px; margin: 0 auto; padding: 16px;
}
.tile {
  aspect-ratio: 1; background: var(--surface); cursor: pointer; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center; font-size: 2rem;
}
.tile::after {
  content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 60%, rgba(0,0,0,0.5));
  opacity: 0; transition: opacity 0.2s;
}
.tile:hover::after { opacity: 1; }
.tile:nth-child(3n+1) { background: linear-gradient(135deg, #312e81, #581c87); }
.tile:nth-child(3n+2) { background: linear-gradient(135deg, #831843, #701a75); }
.tile:nth-child(3n) { background: linear-gradient(135deg, #1e3a5f, #134e4a); }

.upload-bar {
  max-width: 560px; margin: 24px auto; padding: 24px; background: var(--surface);
  border-radius: 16px; border: 1px solid var(--border);
}
.upload-bar h3 { margin-bottom: 12px; font-size: 1rem; }
.upload-zone {
  border: 2px dashed var(--border); border-radius: 12px; padding: 32px; text-align: center; cursor: pointer;
}
.upload-zone:hover { border-color: var(--accent); }

.page-narrow { max-width: 400px; margin: 0 auto; padding: 48px 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px; }
.card h2 { margin-bottom: 8px; }
.sub { color: var(--muted); font-size: 0.85rem; margin-bottom: 20px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 4px; }
.form-group input {
  width: 100%; padding: 11px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 0.95rem;
}
.alert { padding: 11px 14px; border-radius: 8px; font-size: 0.85rem; margin-bottom: 14px; }
.alert-error { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid var(--danger); }
.progress-wrap { background: var(--border); border-radius: 99px; height: 6px; margin: 12px 0; overflow: hidden; }
.progress-bar { height: 100%; background: var(--accent); width: 0%; transition: width 0.3s; }

footer { text-align: center; padding: 24px; color: var(--muted); font-size: 0.75rem; margin-top: 32px; }