:root {
  --bg: #ffffff;
  --fg: #0f172a; /* slate-900 */
  --muted: #334155; /* slate-700 */
  --border: #e2e8f0; /* slate-200 */
  --primary: #1e63ff; /* blue */
  --primary-600: #1a56e3;
  --accent: #2dd4bf; /* teal */
  --card: #ffffff;
  --shadow: 0 2px 10px rgba(15, 23, 42, 0.08);
}

:root[data-theme="dark"] {
  --bg: #0b1220;
  --fg: #e5e7eb;
  --muted: #94a3b8;
  --border: #1f2a44;
  --primary: #4c8dff;
  --primary-600: #3a76df;
  --accent: #22d3ee;
  --card: #0f172a;
  --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Roboto', system-ui, -apple-system, Segoe UI, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
  color: var(--fg);
  background: radial-gradient(80rem 60rem at 30% -10%, rgba(80, 120, 255, 0.08), transparent 50%),
              radial-gradient(70rem 50rem at 110% 10%, rgba(34, 211, 238, 0.06), transparent 40%),
              var(--bg);
}

.container { max-width: 1200px; margin: 0 auto; padding: 1rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  height: 40px;
  padding: 0 .875rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  cursor: pointer;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: white; border-color: transparent; }
.btn-primary:hover { background: var(--primary-600); }
.btn-icon { width: 40px; padding: 0; }

.input {
  width: 100%;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  padding: 0 .875rem;
}

.row { display: flex; gap: 1rem; align-items: center; }
.col { display: flex; flex-direction: column; gap: .5rem; }

.grid { display: grid; gap: 1rem; }
.grid-files { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: .75rem; }
.chip {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .35rem .6rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--card);
}

.sidebar {
  width: 76px; padding: .75rem; border-right: 1px solid var(--border);
  display: flex; flex-direction: column; gap: .5rem; align-items: center;
}
.sidebar .nav-btn { width: 48px; height: 48px; border-radius: 12px; }
.sidebar .nav-btn[aria-current="page"] { background: color-mix(in oklab, var(--primary) 16%, transparent); color: var(--primary); border-color: transparent; }

.content { padding: 1rem; width: 100%; }

.hidden { display: none; }
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.35); display: grid; place-items: center; z-index: 50;
}
.modal { width: min(560px, 92vw); }

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