/* ==========================================================================
   GSv2.0 Website - Design System
   Based on Kiksi Dashboard Design
   ========================================================================== */

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

:root {
  /* Colors */
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --text-primary: #ffffff;
  --text-secondary: #b0b8c4;
  --accent: #3ca8d0;
  --accent-hover: #5ec4ea;
  --accent-glow: rgba(60, 168, 208, 0.3);
  --accent-glow-strong: rgba(60, 168, 208, 0.5);
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
  --success: #10b981;
  --error: #ef4444;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-Index */
  --z-canvas: -1;
  --z-content: 1;
  --z-nav: 100;
  --z-modal: 200;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-hover);
}

/* ==========================================================================
   Animated Background
   ========================================================================== */

#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-canvas);
  opacity: 0.4;
  pointer-events: none;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-nav);
  padding: 1rem 2rem;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.navbar:hover {
  background: rgba(255, 255, 255, 0.09);
  border-bottom-color: rgba(255, 255, 255, 0.18);
}

.navbar-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  margin-right: auto;
}

.navbar-brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.navbar-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.navbar-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--text-primary);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: #0d5f7a;
  color: white;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow-strong);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  color: white;
  transform: translateY(-2px);
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  position: relative;
  z-index: var(--z-content);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  padding-top: 100px;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(to bottom, var(--text-primary), rgba(255, 255, 255, 0.4));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 2rem);
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 3rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
  position: relative;
  z-index: var(--z-content);
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  background: linear-gradient(to bottom, var(--text-primary), rgba(255, 255, 255, 0.5));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 3rem;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.card:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-5px);
  border-color: var(--accent);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Grid Layouts
   ========================================================================== */

.grid {
  display: grid;
  gap: 2rem;
}

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

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ==========================================================================
   Stats
   ========================================================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 4rem auto;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-5px);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Forms
   ========================================================================== */

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

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  position: relative;
  z-index: var(--z-content);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4rem 2rem 2rem;
  margin-top: 4rem;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(60, 168, 208, 0.25) 25%,
    rgba(60, 168, 208, 0.5) 50%,
    rgba(60, 168, 208, 0.25) 75%,
    transparent 100%
  );
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 4rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 2rem;
}

.footer-brand-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-branding {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-branding img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.footer-logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-links-wrapper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-heading {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-legal a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-legal span {
  opacity: 0.35;
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-secondary { color: var(--text-secondary); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  .navbar {
    padding: 0.75rem 1rem;
  }

  .navbar-links {
    display: none;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-links-wrapper {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .hero {
    padding: 1.5rem;
    padding-top: 80px;
  }

  .section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta .btn {
    width: 100%;
  }
}

/* ==========================================================================
   Page-specific styles
   ========================================================================== */

/* Legal pages */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
  padding-top: 120px;
}

.legal-content h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.legal-content h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.legal-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.legal-content ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* Legal page enhancements */
.legal-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.legal-content li {
  margin-bottom: 0.4rem;
  line-height: 1.7;
}

.legal-content a {
  color: var(--accent);
}

.legal-meta {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.8rem;
  margin-bottom: 2.5rem;
  letter-spacing: 0.02em;
}

.notice-warning {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  color: #f87171;
  font-size: 0.95rem;
  line-height: 1.6;
}

.notice-warning strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.notice-info {
  background: rgba(60, 168, 208, 0.07);
  border: 1px solid rgba(60, 168, 208, 0.25);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.notice-info strong {
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.5rem;
  font-size: 0.88rem;
}

.legal-table th,
.legal-table td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}

.legal-table th {
  color: var(--text-primary);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.03);
  white-space: nowrap;
}

.legal-table tr:last-child td {
  border-bottom: none;
}

/* "Open Source Studio" badge (index hero) */
.code-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.04em;
    margin-bottom: 24px;
}

/* Contact page */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .contact-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.contact-info-item svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
}