:root {
  --bg: #0b1220;
  --card: #111827;
  --card2: #0f172a;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent2: #a78bfa;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --best: rgba(52, 211, 153, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(1000px 500px at 8% -8%, #1e293b 0%, transparent 55%),
    radial-gradient(800px 400px at 95% 10%, #312e81 0%, transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--accent); }

.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 1.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--accent2);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 2.85rem);
  margin: 0.2rem 0 0.75rem;
  letter-spacing: -0.02em;
}

.lead {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 48rem;
  margin: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.05rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  font-family: inherit;
}

.btn:hover:not(:disabled) { border-color: #374151; }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  border-color: transparent;
  color: #fff;
}

.btn.ghost {
  background: transparent;
  border-style: dashed;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

section { margin: 2.25rem 0; }

h2 {
  margin: 0 0 0.65rem;
  font-size: 1.35rem;
}

h3 {
  margin: 0 0 0.55rem;
  font-size: 1.02rem;
  color: var(--accent);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.85rem;
}

.section-head h2 { margin: 0; }

.status {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.playground .panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
}

.hint {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.samples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
}

.chip {
  border: 1px solid var(--border);
  background: var(--card2);
  color: var(--text);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  cursor: pointer;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.drop {
  position: relative;
  border: 1.5px dashed #334155;
  border-radius: 12px;
  padding: 1.4rem 1rem;
  text-align: center;
  background: var(--card2);
  transition: border-color 0.15s, background 0.15s;
}

.drop.drag {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
}

.drop p { margin: 0.2rem 0; }

.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.file-meta {
  margin: 0.75rem 0 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  color: var(--accent2);
}

.controls { display: flex; flex-direction: column; gap: 0.9rem; }

.range-label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.range-label input[type="range"] {
  width: 100%;
  max-width: 420px;
  accent-color: var(--accent);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.table-wrap {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
}

table.cmp {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.cmp th,
table.cmp td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

table.cmp th {
  background: var(--card2);
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}

table.cmp tr:last-child td { border-bottom: none; }

table.cmp tr.best {
  background: var(--best);
}

table.cmp tr.best td:first-child {
  font-weight: 700;
  color: var(--ok);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 780px) {
  .split { grid-template-columns: 1fr; }
}

.ops, .log {
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  min-height: 140px;
  max-height: 280px;
  overflow: auto;
  font-size: 0.8rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  margin: 0;
}

.log div { margin-bottom: 0.35rem; word-break: break-word; }
.log .ok { color: var(--ok); }
.log .warn { color: var(--warn); }
.log .err { color: var(--err); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}

article h3 { margin: 0 0 0.4rem; font-size: 1rem; color: var(--accent); }
article p { margin: 0; color: var(--muted); font-size: 0.93rem; }

pre {
  background: #020617;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.88rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

ul { color: var(--muted); padding-left: 1.2rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

footer {
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  padding: 1.5rem;
  font-size: 0.9rem;
}