:root {
  --bg: #0e1116;
  --surface: #161b22;
  --surface-2: #1f2631;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #00d4ff;
  --accent-2: #7c3aed;
  --success: #2ea043;
  --error: #f85149;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(ellipse at top, #1a2130 0%, var(--bg) 50%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

header { text-align: center; margin-bottom: 2.5rem; }
header h1 {
  margin: 0 0 0.5rem;
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
header .sub { margin: 0; color: var(--muted); font-size: 1.05rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.row { display: flex; gap: 0.75rem; }

.check-row {
  display: flex !important;
  align-items: center;
  gap: 0.55rem;
  margin: 0.85rem 0 0 !important;
  padding: 0 !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
  font-weight: 400 !important;
  color: var(--text) !important;
  font-size: 0.92rem !important;
  cursor: pointer;
  user-select: none;
}
.check-row input[type="checkbox"] {
  width: 17px; height: 17px;
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
}

input[type="url"] {
  flex: 1;
  padding: 0.9rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: "JetBrains Mono", Consolas, monospace;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input[type="url"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

button {
  padding: 0.9rem 1.75rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s, opacity 0.15s;
}
button:hover:not(:disabled) { transform: translateY(-1px); }
button:active:not(:disabled) { transform: translateY(0); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.features {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}
.features li {
  padding: 0.5rem 0 0.5rem 1.75rem;
  position: relative;
  color: var(--muted);
  font-size: 0.95rem;
}
.features li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0.5rem;
  color: var(--accent);
  font-weight: 700;
}
.features code {
  background: var(--surface-2);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88em;
  color: var(--accent);
}

.error, .error-box {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(248, 81, 73, 0.12);
  border: 1px solid rgba(248, 81, 73, 0.35);
  border-radius: 8px;
  color: var(--error);
  font-size: 0.9rem;
}

.progress-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.badge {
  padding: 0.3rem 0.7rem;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge.running { color: var(--accent); border-color: var(--accent); }
.badge.done { color: var(--success); border-color: var(--success); }
.badge.failed { color: var(--error); border-color: var(--error); }

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

.stage-label {
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.5rem;
  min-height: 1.3em;
  font-family: "JetBrains Mono", Consolas, monospace;
}
.progress-bar {
  height: 8px;
  background: var(--surface-2);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 1rem;
  position: relative;
}
#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.6s ease;
  position: relative;
  overflow: hidden;
}
.progress-bar.active #progress-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.2) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 75%,
    transparent 75%,
    transparent
  );
  background-size: 22px 22px;
  animation: progress-stripe 1.2s linear infinite;
}
@keyframes progress-stripe {
  from { background-position: 0 0; }
  to { background-position: 22px 0; }
}

.log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 260px;
  overflow-y: auto;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 0.85rem;
  background: var(--surface-2);
  border-radius: 6px;
  padding: 0.75rem;
}
.log li {
  padding: 0.15rem 0;
  color: var(--muted);
  word-break: break-all;
}
.log li .step { color: var(--accent); font-weight: 600; margin-right: 0.5rem; }

.result { margin-top: 1.25rem; }
.stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.9rem 0.5rem;
  background: var(--surface-2);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.stat-num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.2rem;
  text-align: center;
}

.download-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--success), #1a7f37);
  color: #fff;
  text-align: center;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: transform 0.1s;
}
.download-btn:hover { transform: translateY(-1px); }

footer { text-align: center; margin-top: 2rem; }
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .container { padding: 1.5rem 1rem; }
  header h1 { font-size: 2rem; }
  .row { flex-direction: column; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}