/* ===== IMPORTS & VARIABLES ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* Dark Theme (Default) */
:root,
[data-theme="dark"] {
  --primary: #00d9ff;
  --primary-dark: #00a8c7;
  --secondary: #ffd700;
  --bg-dark: #0a0f1a;
  --bg-card: #0f1623;
  --bg-card-hover: #141d2c;
  --bg-navbar: rgba(10, 15, 26, 0.8);
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(255, 255, 255, 0.08);
  --gradient-primary: linear-gradient(135deg, #00d9ff 0%, #667eea 100%);
  --gradient-gold: linear-gradient(135deg, #ffd700 0%, #f59e0b 100%);
  --shadow-glow: 0 0 40px rgba(0, 217, 255, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Category Colors */
  --color-ia: #a855f7;
  --color-android: #3ddc84;
  --color-ios: #64748b;
  --color-frontend: #f59e0b;
}

/* Light Theme */
[data-theme="light"] {
  --primary: #0891b2;
  --primary-dark: #0e7490;
  --secondary: #d97706;
  --bg-dark: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-navbar: rgba(255, 255, 255, 0.9);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px rgba(8, 145, 178, 0.1);
}

/* ===== RESET ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== BASE ===== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== NAVBAR ===== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 4rem;
  background: var(--bg-navbar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo img {
  height: 42px;
  transition: var(--transition);
}

.nav-logo:hover img {
  transform: scale(1.05);
}

.nav-logo span {
  font-weight: 700;
  font-size: 1.25rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a {
  padding: 0.6rem 1.2rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

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

.nav-links a.active {
  color: var(--primary);
  background: rgba(0, 217, 255, 0.1);
}

/* Theme Toggle Button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
  margin-left: 0.5rem;
}

.theme-toggle:hover {
  background: var(--primary);
  color: var(--bg-dark);
  border-color: var(--primary);
  transform: rotate(15deg);
}

/* ===== MAIN ===== */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

/* ===== COMING SOON SECTION ===== */
.coming-soon-section {
  width: 100%;
  max-width: 900px;
  text-align: center;
}

.coming-soon-content {
  animation: fadeInUp 0.8s ease-out forwards;
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.coming-soon-icon {
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.1) 0%, rgba(102, 126, 234, 0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  font-size: 2.5rem;
  color: var(--primary);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.2);
  }

  50% {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.3);
  }
}

.coming-soon-badge {
  display: inline-block;
  background: var(--gradient-gold);
  color: var(--bg-dark);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}

.coming-soon-section h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.coming-soon-text {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 550px;
  margin: 0 auto 3rem;
  line-height: 1.8;
}

.coming-soon-text .highlight {
  color: var(--primary);
  font-weight: 600;
}

/* ===== TOPICS PREVIEW ===== */
.topics-preview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 3rem;
}

.topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  transition: var(--transition);
}

.topic-card:hover {
  border-color: rgba(0, 217, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.topic-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin: 0 auto 1rem;
  font-size: 1.5rem;
}

.topic-icon.android {
  background: rgba(61, 220, 132, 0.15);
  color: var(--color-android);
}

.topic-icon.ios {
  background: rgba(100, 116, 139, 0.15);
  color: var(--text-primary);
}

.topic-icon.ia {
  background: rgba(168, 85, 247, 0.15);
  color: var(--color-ia);
}

.topic-icon.frontend {
  background: rgba(245, 158, 11, 0.15);
  color: var(--color-frontend);
}

.topic-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.topic-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== CTA ===== */
.coming-soon-cta {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.coming-soon-cta>p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

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

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--bg-dark);
  box-shadow: 0 4px 15px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(0, 217, 255, 0.4);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .navbar {
    padding: 1rem 1.5rem;
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-links a {
    padding: 0.5rem 0.8rem;
    font-size: 0.85rem;
  }

  main {
    padding: 2rem 1.5rem;
  }

  .coming-soon-icon {
    width: 80px;
    height: 80px;
    font-size: 2rem;
  }

  .coming-soon-section h1 {
    font-size: 2rem;
  }

  .coming-soon-text {
    font-size: 1rem;
    margin-bottom: 2rem;
  }

  .topics-preview {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .coming-soon-section h1 {
    font-size: 1.75rem;
  }

  .topics-preview {
    grid-template-columns: 1fr;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    justify-content: center;
  }
}