:root {
  --bg-color: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.7);
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: rgba(255, 255, 255, 0.1);
  --accent: #f59e0b;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
  background: radial-gradient(circle at top left, #1e1b4b, #0f172a);
  color: var(--text-main);
  min-height: 100vh;
  padding: 2rem 1rem;
}

.container {
  max-width: 850px;
  margin: 0 auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.header h1 {
  font-size: 1.8rem;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cloudflare-badge {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent);
  border: 1px solid rgba(245, 158, 11, 0.4);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: #ffffff;
  background: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card h2 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.dropzone {
  border: 2px dashed rgba(59, 130, 246, 0.4);
  background: rgba(15, 23, 42, 0.5);
  border-radius: 12px;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.dropzone:hover {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.05);
}

.dropzone-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  margin: 1.5rem 0;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}

.divider::before { margin-right: 0.5rem; }
.divider::after { margin-left: 0.5rem; }

.input-group {
  display: flex;
  gap: 0.75rem;
}

input[type="text"] {
  flex: 1;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border);
  color: #ffffff;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }

.result-box {
  margin-top: 1.5rem;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  font-family: monospace;
  word-break: break-all;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(15, 23, 42, 0.6);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.feature-item .icon {
  font-size: 1.8rem;
}