:root {
  --bg: #1a1025;
  --card: #281a3a;
  --accent: #e4b93c;
  --accent-2: #d95d39;
  --text: #f1e9f7;
  --muted: #b3a3c4;
  --ok: #6fcf97;
  --err: #eb5757;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #4a2e63 0%, var(--bg) 55%);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(860px, 100%);
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

header { text-align: center; margin-bottom: 20px; }
h1 { margin: 0 0 6px; font-size: 1.6rem; letter-spacing: 0.3px; }
h2 { font-size: 1rem; margin: 14px 0 8px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.sub { margin: 0 auto; color: var(--muted); max-width: 60ch; line-height: 1.5; }
.sub a { color: var(--accent); }

.examples { margin: 6px 0 2px; }
.examples-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.example-btn { font-size: 0.85rem; padding: 8px 14px; }

.row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 22px;
  margin: 14px 0;
}
@media (max-width: 700px) { .row { grid-template-columns: 1fr; } }

.col { background: rgba(0, 0, 0, 0.18); border-radius: 12px; padding: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.95rem;
  cursor: pointer;
  background: #3c2b54;
  color: var(--text);
  transition: transform 0.06s ease, background 0.15s ease, opacity 0.15s ease;
}
.btn:hover:not(:disabled) { background: #483465; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #24180a; font-weight: 700; }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); }
.btn.ghost { border: 1px solid rgba(255, 255, 255, 0.2); background: transparent; }

.drop {
  display: block;
  margin-top: 10px;
  border: 2px dashed rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  padding: 26px 12px;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.drop:hover, .drop.dragover { border-color: var(--accent); background: rgba(228, 185, 60, 0.07); }

.preview { margin-top: 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.preview audio { flex: 1; min-width: 200px; }

.hint { color: var(--muted); font-size: 0.85rem; margin: 10px 0 0; }
.actions { display: flex; align-items: center; gap: 16px; margin: 18px 0 4px; flex-wrap: wrap; }
#result-section { margin-top: 8px; }
#result-section audio { width: 100%; margin: 6px 0; }
.foot { margin-top: 20px; text-align: center; font-size: 0.8rem; color: var(--muted); }

.banner { padding: 10px 14px; border-radius: 10px; margin-bottom: 12px; font-size: 0.9rem; }
.banner.error { background: rgba(235, 87, 87, 0.15); border: 1px solid var(--err); color: #ffb3b3; }
.banner.success { background: rgba(111, 207, 151, 0.12); border: 1px solid var(--ok); color: #b8f0d0; }

.hidden { display: none !important; }

input[type="range"] { width: 100%; accent-color: var(--accent); }
.checkbox { display: flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--muted); }

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: -2px;
}
@keyframes spin { to { transform: rotate(360deg); } }