/* Global design tokens using CSS variables */
:root {
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bg-primary: #0a0f1d;
  --bg-secondary: #131b2e;
  --bg-card: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  
  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-secondary: #10b981;
  --color-secondary-hover: #059669;
  --color-accent: #f43f5e;
  
  --gradient-hero: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-card: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0) 100%);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
}

/* Base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
header {
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(10, 15, 29, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo img {
  height: 40px;
  display: block;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--color-text-primary);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.05);
}

/* Hero Section */
.hero {
  padding: 5rem 0 3rem 0;
  text-align: center;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 300px;
  background: var(--color-primary);
  filter: blur(120px);
  opacity: 0.15;
  z-index: -1;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero h1 span {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

/* Interactive Demo Form */
.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  max-width: 600px;
  margin: 2rem auto;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
}

.form-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.form-input {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Result display */
.result-box {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 700;
  display: none;
}

.result-erkek {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.result-bayan {
  background: rgba(236, 72, 153, 0.15);
  color: #f472b6;
  border: 1px solid rgba(236, 72, 153, 0.3);
}

.result-unisex {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.result-unknown {
  background: rgba(148, 163, 184, 0.15);
  color: #cbd5e1;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

/* Marketing Info Grid */
.features-section {
  padding: 5rem 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.icon-wrapper {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

.icon-wrapper svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Documentation Section */
.docs-section {
  padding: 5rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.code-block {
  background: #05070f;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  overflow-x: auto;
  font-family: Consolas, Monaco, monospace;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  margin-top: 1rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  background-color: var(--bg-primary);
  color: var(--color-text-secondary);
}

.footer-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

/* Alert log notifications for dev/test */
.alert-info {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(99, 102, 241, 0.2);
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.form-helper {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-secondary);
}

/* Layout and Utility Classes */
.main-padding {
  padding: 4rem 1.5rem;
}
.auth-card {
  margin: 0 auto;
  max-width: 480px;
}
.alert-danger {
  display: block;
  margin-bottom: 1.5rem;
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.1);
}
.btn-full {
  width: 100%;
}
.mt-1 {
  margin-top: 1rem;
}
.mt-1-5 {
  margin-top: 1.5rem;
}
.mt-2 {
  margin-top: 2rem;
}
.mb-1 {
  margin-bottom: 1rem;
}
.mb-1-5 {
  margin-bottom: 1.5rem;
}
.mb-2 {
  margin-bottom: 2rem;
}
.text-center {
  text-align: center;
}
.text-secondary-sm {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}
.auth-link {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  margin-left: 0.25rem;
}

/* Panel Styles */
.panel-wrapper {
  margin-top: 2rem;
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}
.user-info-bar {
  color: var(--color-text-secondary);
}
.tab-menu {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}
.tab-link {
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
}
.tab-link:hover, .tab-link.active {
  color: var(--color-text-primary);
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.api-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 768px) {
  .api-info-grid {
    grid-template-columns: 1fr;
  }
}
.info-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 1.2rem;
  border-radius: var(--radius-md);
}
.info-box-title {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}
.info-box-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-primary);
}
.btn-group {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}
.btn-danger {
  background-color: var(--color-accent);
  color: #fff;
}
.btn-danger:hover {
  background-color: #e11d48;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
}
.logs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.95rem;
}
.logs-table th, .logs-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.logs-table th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text-primary);
  font-weight: 600;
}
.logs-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}
.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}
.badge-erkek {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
}
.badge-bayan {
  background: rgba(236, 72, 153, 0.15);
  color: #f472b6;
}
.badge-unisex {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
}
.badge-unknown {
  background: rgba(148, 163, 184, 0.15);
  color: #cbd5e1;
}

.alert-success {
  display: block;
  margin-bottom: 1.5rem;
  color: var(--color-secondary);
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.1);
}

.hide-svg {
  display: none;
}

.terms-container {
  max-width: 800px;
}