:root {
  --bg: #0f1226;
  --card: #1a1f3c;
  --accent: #6c8cff;
  --accent-2: #00d4a0;
  --text: #eef1ff;
  --muted: #9aa3c7;
  --border: #2c3358;
  --error: #ff6b6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, "Noto Naskh Arabic", sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #23306b 0%, var(--bg) 55%);
  color: var(--text);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 16px 64px;
}

.card {
  width: 100%;
  max-width: 680px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 28px 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

h1 { font-size: 1.5rem; margin: 0 0 6px; }
h2 { font-size: 1.15rem; margin: 18px 0 10px; color: var(--accent-2); }

.subtitle { color: var(--muted); margin: 0 0 22px; line-height: 1.7; font-size: 0.95rem; }

label { display: block; font-weight: 600; margin: 14px 0 6px; }

textarea, input[type="file"], select {
  width: 100%;
  background: #11152e;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 1rem;
  font-family: inherit;
}

textarea { resize: vertical; }
textarea:focus, select:focus { outline: none; border-color: var(--accent); }

small { display: block; color: var(--muted); margin-top: 6px; font-size: 0.82rem; }

.row { display: flex; gap: 16px; }
.col { flex: 1; }

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

.advanced { margin-top: 16px; border: 1px dashed var(--border); border-radius: 10px; padding: 8px 12px; }
.advanced summary { cursor: pointer; color: var(--accent); font-weight: 600; }

.preset-preview { width: 100%; height: 40px; margin-top: 10px; }

.tashkeel-hint {
  background: rgba(124, 156, 255, 0.10);
  border: 1px solid rgba(124, 156, 255, 0.35);
  border-radius: 8px;
  padding: 8px 12px;
  line-height: 1.7;
  color: var(--text, #e6e6e6);
}

.badge {
  display: inline-block;
  background: rgba(0, 212, 160, 0.15);
  color: var(--accent-2);
  border: 1px solid var(--accent-2);
  border-radius: 6px;
  padding: 1px 8px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-inline-start: 6px;
}

button#submit-btn {
  width: 100%;
  margin-top: 22px;
  padding: 14px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #0b0e22;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.2s;
}
button#submit-btn:hover:not(:disabled) { transform: translateY(-2px); }
button#submit-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.status { margin-top: 22px; text-align: center; }
.status p { color: var(--muted); margin: 10px 0; }

.spinner {
  width: 38px; height: 38px; margin: 0 auto;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.progress { height: 8px; background: #11152e; border-radius: 6px; overflow: hidden; }
#progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.4s ease;
}

.result { margin-top: 22px; }
.result audio { width: 100%; margin-bottom: 12px; }

.download-btn {
  display: inline-block;
  background: #11152e;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
}
.download-btn:hover { border-color: var(--accent); }

.error-box {
  margin-top: 18px;
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid var(--error);
  color: #ffd7d7;
  padding: 12px 14px;
  border-radius: 10px;
}

.note { margin-top: 24px; color: var(--muted); font-size: 0.82rem; line-height: 1.7; }

.hidden { display: none; }