:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-border: #e3e7ee;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { display: flex; flex-direction: column; min-height: 100vh; }

.app-header {
  background: #0f172a;
  color: #f8fafc;
  border-bottom: 1px solid #1e293b;
}
.app-header .inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.85rem 1.25rem;
}
.app-header .brand {
  font-weight: 700; font-size: 1.1rem; color: #f8fafc; letter-spacing: 0.02em;
}
.app-header nav { display: flex; gap: 1.25rem; }
.app-header nav a {
  color: #cbd5e1; font-weight: 500; font-size: 0.95rem;
  padding: 0.35rem 0.25rem; border-bottom: 2px solid transparent;
}
.app-header nav a:hover { color: #fff; text-decoration: none; }
.app-header nav a.active { color: #fff; border-bottom-color: var(--color-primary); }

.app-main { flex: 1; max-width: 1200px; width: 100%; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.app-footer {
  border-top: 1px solid var(--color-border);
  background: #fff; color: var(--color-muted);
  text-align: center; font-size: 0.85rem; padding: 0.75rem 1rem;
}

h1 { font-size: 1.6rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.25rem; margin: 1.5rem 0 0.75rem; }
.lead { color: var(--color-muted); margin: 0 0 1.5rem; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 1rem; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }

.grid { display: grid; gap: 1rem; }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.tile {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 1.25rem; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--color-border); box-shadow: var(--shadow);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
.tile:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); text-decoration: none; }
.tile .tile-title { font-weight: 600; color: var(--color-text); font-size: 1.05rem; }
.tile .tile-desc { color: var(--color-muted); font-size: 0.92rem; }

form .field { margin-bottom: 1rem; }
form label { display: block; font-weight: 600; margin-bottom: 0.25rem; font-size: 0.92rem; }
form .help { color: var(--color-muted); font-size: 0.85rem; margin-top: 0.25rem; }
form input[type="text"], form input[type="number"], form input[type="file"], form select, form textarea {
  width: 100%; padding: 0.55rem 0.7rem; border: 1px solid var(--color-border);
  border-radius: 8px; font: inherit; background: #fff;
}
form input:focus, form select:focus, form textarea:focus {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
form .errorlist { color: var(--color-danger); list-style: none; padding: 0; margin: 0.25rem 0 0; font-size: 0.85rem; }
form .checkbox { display: flex; align-items: center; gap: 0.5rem; }
form .checkbox input { width: auto; }

.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1rem; border-radius: 8px; border: 1px solid transparent;
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { background: #f1f5f9; text-decoration: none; }
.btn-danger { background: var(--color-danger); color: #fff; }

.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
table th, table td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--color-border); }
table th { background: #f8fafc; color: var(--color-muted); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; }
table tr:hover td { background: #f8fafc; }

.badge {
  display: inline-block; padding: 0.15rem 0.55rem; border-radius: 999px;
  font-size: 0.78rem; font-weight: 600; line-height: 1.5;
}
.badge-pending  { background: #e0e7ff; color: #3730a3; }
.badge-running  { background: #fef3c7; color: #92400e; }
.badge-success  { background: #d1fae5; color: #065f46; }
.badge-failed   { background: #fee2e2; color: #991b1b; }

.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.messages li {
  padding: 0.6rem 0.9rem; border-radius: 8px; margin-bottom: 0.5rem;
  border: 1px solid var(--color-border); background: #fff;
}
.messages li.success { border-color: #a7f3d0; background: #ecfdf5; color: #065f46; }
.messages li.error   { border-color: #fecaca; background: #fef2f2; color: #991b1b; }
.messages li.warning { border-color: #fde68a; background: #fffbeb; color: #92400e; }
.messages li.info    { border-color: #bae6fd; background: #f0f9ff; color: #075985; }

.thumbs { display: grid; gap: 0.75rem; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.thumb {
  display: block; background: #fff; border: 1px solid var(--color-border); border-radius: 8px;
  padding: 0.5rem; text-align: center; font-size: 0.8rem;
}
.thumb img { max-width: 100%; height: auto; display: block; margin: 0 auto 0.4rem; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 0.35rem 1rem; font-size: 0.95rem; }
.kv dt { color: var(--color-muted); }
.kv dd { margin: 0; }

.tag {
  display: inline-block; background: #eef2ff; color: #3730a3;
  border-radius: 6px; padding: 0.1rem 0.45rem; font-size: 0.8rem; margin: 0.1rem;
}

video.player, img.preview { max-width: 100%; border-radius: 8px; border: 1px solid var(--color-border); }