:root {
  --bg: #0a0e1a;
  --bg-gradient: linear-gradient(135deg, #0a0e1a 0%, #0d1225 50%, #0a0e1a 100%);
  --surface: rgba(18, 25, 51, 0.8);
  --surface-hover: rgba(25, 35, 70, 0.9);
  --text: #f0f4ff;
  --text-muted: #7a8ba8;
  --border: rgba(100, 130, 200, 0.15);
  --border-hover: rgba(100, 130, 200, 0.3);
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-glow: rgba(99, 102, 241, 0.3);
  --success: #10b981;
  --danger: #ef4444;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  background-size: 400% 400%;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.wrap {
  width: min(1000px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 64px;
}

.wrap.narrow { width: min(520px, calc(100% - 40px)); }

.nav {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  width: fit-content;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.nav a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.hero {
  margin-bottom: 48px;
  text-align: left;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  margin: 0;
  color: var(--text-muted);
  font-size: 18px;
  max-width: 600px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  transition: var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(99, 102, 241, 0.1);
}

.card h2 {
  margin: 0 0 20px;
  font-size: 24px;
  font-weight: 600;
  color: var(--text);
}

.form-group {
  margin-bottom: 20px;
}

.form-group:last-of-type {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

input[type="file"] {
  width: 100%;
  padding: 16px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
}

input[type="file"]:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
}

select, input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: 14px 16px;
  font-size: 15px;
  font-family: inherit;
  transition: var(--transition);
}

select:hover, input[type="text"]:hover {
  border-color: var(--border-hover);
}

select:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

select option {
  background: var(--bg);
  color: var(--text);
  padding: 8px;
}

button {
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 16px var(--primary-glow);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

button.danger {
  background: linear-gradient(135deg, var(--danger) 0%, #f87171 100%);
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3);
}

button.danger:hover {
  box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

pre {
  overflow: auto;
  background: rgba(10, 16, 34, 0.9);
  border: 1px solid var(--border);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: 14px;
  line-height: 1.7;
  color: #d1d5db;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  border-bottom: 1px solid var(--border);
  padding: 14px 12px;
  vertical-align: top;
}

th {
  font-weight: 600;
  color: var(--text);
}

td {
  color: var(--text-muted);
}

.success {
  background: var(--success);
  color: white;
}

.error {
  color: var(--danger);
  font-weight: 500;
}

@media (max-width: 640px) {
  .wrap { padding: 24px 0 48px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .card { padding: 20px; }
  .nav { width: 100%; flex-wrap: wrap; }
  .nav a { flex: 1; text-align: center; min-width: 80px; }
}