:root {
  --bg: #07070f;
  --surface: #0e0e1c;
  --border: rgba(255,255,255,0.06);
  --muted: #555;
  --text: #e8e8f0;
  --accent: #7c3aed;
  --accent2: #a855f7;
  --green: #22c55e;
  --red: #ef4444;
  --radius: 12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.logo {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.3px;
}
.logo span { color: var(--accent2); }

.tagline {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.3px;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  gap: 24px;
}

.generator-box, .progress-box, .result-box, .error-box {
  width: 100%;
  max-width: 600px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.generator-box h2 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.subtitle {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 28px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}

input[type="text"], select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}
input[type="text"]:focus, select:focus { border-color: var(--accent); }

.lang-toggle {
  display: flex;
  gap: 6px;
}

.lang-btn {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 10px;
  cursor: pointer;
  transition: all 0.15s;
}
.lang-btn.active {
  background: rgba(124,58,237,0.15);
  border-color: var(--accent);
  color: var(--accent2);
}

.btn-generate {
  width: 100%;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 14px;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, transform 0.1s;
}
.btn-generate:hover { background: var(--accent2); }
.btn-generate:active { transform: scale(0.98); }
.btn-generate:disabled { opacity: 0.5; cursor: not-allowed; }

/* Progress */
.progress-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.progress-header {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--accent2);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(168,85,247,0.2);
  border-top-color: var(--accent2);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

.progress-track {
  height: 6px;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 10px;
  transition: width 0.4s ease;
}

.progress-pct {
  font-size: 0.75rem;
  color: var(--muted);
  text-align: right;
}

/* Result */
.result-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.2);
  border-radius: 20px;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 4px 12px;
  text-transform: uppercase;
  width: fit-content;
}

.result-box h3 {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.2px;
}

.result-desc {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

.result-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tag {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: #444;
  font-size: 0.65rem;
  padding: 3px 8px;
}

.result-actions {
  display: flex;
  gap: 10px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.btn-download {
  flex: 1;
  background: var(--green);
  border-radius: 8px;
  color: #000;
  font-size: 0.88rem;
  font-weight: 800;
  padding: 13px;
  text-align: center;
  text-decoration: none;
  transition: opacity 0.2s;
}
.btn-download:hover { opacity: 0.85; }

.btn-new {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 13px 18px;
  transition: border-color 0.2s;
}
.btn-new:hover { border-color: var(--accent); }

/* Error */
.error-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.error-icon { color: var(--red); font-size: 2rem; }
#errorMsg { font-size: 0.82rem; color: var(--muted); }

footer {
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  font-size: 0.72rem;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 8px;
}
footer a { color: var(--accent2); text-decoration: none; }
footer strong { color: var(--text); }

/* Engine toggle */
.engine-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.engine-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  text-align: left;
  transition: all 0.15s;
}

.engine-btn.active {
  background: rgba(124,58,237,0.12);
  border-color: var(--accent);
}

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

.engine-icon { font-size: 1.2rem; }
.engine-name { font-size: 0.82rem; font-weight: 700; }
.engine-sub { font-size: 0.68rem; color: var(--muted); }

.lock-badge {
  background: rgba(251,146,60,0.15);
  border: 1px solid rgba(251,146,60,0.3);
  border-radius: 4px;
  color: #fb923c;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-left: 4px;
  padding: 1px 5px;
  vertical-align: middle;
}

.hidden { display: none !important; }

@media (max-width: 600px) {
  header, footer { padding: 16px 20px; }
  .generator-box, .progress-box, .result-box, .error-box { padding: 24px 18px; }
  .form-row { grid-template-columns: 1fr; }
}