/* Stili moderni condivisi (light/dark auto) */

:root{
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e5e7eb;
  --primary: #0ea5e9;
  --primary-600: #0284c7;
  --danger: #ef4444;
  --shadow: 0 8px 28px rgba(2, 8, 23, .06);
  --radius: 16px;
  --ring: 2px solid rgba(14,165,233,.35);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b1220;
    --surface: #0f172a;
    --text: #eaf1ff;
    --muted: #9fb0d7;
    --border: #1f2a44;
    --primary: #38bdf8;
    --primary-600: #0ea5e9;
    --danger: #f87171;
    --shadow: 0 8px 28px rgba(0,0,0,.35);
    --ring: 2px solid rgba(56,189,248,.35);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 28px auto;
  padding: 0 16px;
}

h1 { margin: 0 0 12px; letter-spacing: .2px; font-size: clamp(22px, 3vw, 30px); }
h2 { margin: 0 0 10px; font-size: 20px; }
p { margin: 0 0 8px; }

.muted { color: var(--muted); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; font-size: 12px;
  background: color-mix(in oklab, var(--primary) 14%, transparent);
  color: color-mix(in oklab, var(--primary) 90%, var(--text));
  border: 1px solid color-mix(in oklab, var(--primary) 35%, var(--border));
}

.grid {
  display: grid; gap: 20px;
  grid-template-columns: 2fr 1fr;
}
@media (max-width: 980px){
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.card:hover { border-color: color-mix(in oklab, var(--primary) 25%, var(--border)); }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.grow { flex: 1 1 200px; }

label { display: block; font-weight: 600; margin: 10px 0 6px; }

.input, .select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  color: #0b1021;
  transition: outline-color .15s ease, border-color .15s ease;
}
@media (prefers-color-scheme: dark){
  .input, .select {
    background: #0b1021;
    color: var(--text);
    border-color: #1b2742;
  }
}
.input:focus, .select:focus { outline: var(--ring); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 14px; font-weight: 600;
  border: 0; border-radius: 12px; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--primary-600));
  color: #fff;
  transition: transform .12s ease, filter .15s ease, opacity .15s ease;
}
.btn:hover { filter: brightness(1.04); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.btn-ghost {
  background: color-mix(in oklab, var(--primary) 10%, transparent);
  color: var(--text);
  border: 1px solid color-mix(in oklab, var(--primary) 35%, var(--border));
}
.btn-danger { background: var(--danger); color: #fff; }

.table { width: 100%; border-collapse: collapse; margin-top: 10px; }
.table th, .table td {
  border-bottom: 1px solid var(--border);
  padding: 8px; text-align: left;
}
.table thead th { font-weight: 700; font-size: 13px; color: var(--muted); }

.result {
  background: #0b1021;
  color: #d1f0ff;
  border-radius: 12px;
  padding: 12px;
  min-height: 90px;
  white-space: pre-wrap;
  overflow: auto;
  border: 1px solid color-mix(in oklab, var(--primary) 25%, var(--border));
}

.helper { color: var(--muted); font-size: 13px; }
.divider { height: 1px; background: var(--border); margin: 10px 0; }