/* Component Styles */

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

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-base);
}

[data-theme="dark"] .nav {
  background: rgba(10, 10, 10, 0.8);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  gap: var(--spacing-lg);
}

.nav__brand {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform var(--transition-fast);
}

.nav__brand:hover {
  transform: translateY(-1px);
}

.nav__links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav__link {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-base);
  position: relative;
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-base);
}

.nav__link:hover::after {
  width: 100%;
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--background-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.theme-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-icon {
  transform: rotate(20deg);
}

.theme-icon--sun {
  display: block;
}

.theme-icon--moon {
  display: none;
}

[data-theme="dark"] .theme-icon--sun {
  display: none;
}

[data-theme="dark"] .theme-icon--moon {
  display: block;
}

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

.hero {
  padding: var(--spacing-4xl) 0;
  position: relative;
}

.hero__title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-lg);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 700px;
  line-height: var(--leading-relaxed);
  margin-bottom: var(--spacing-2xl);
}

.hero__cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-tertiary);
}

.hero__scroll-indicator svg {
  width: 24px;
  height: 24px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(10px);
  }
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--background-secondary);
  color: var(--text-primary);
  transition: all var(--transition-base);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

.btn--primary {
  background: var(--accent-gradient);
  border: none;
  color: white;
}

.btn--primary:hover {
  background: var(--accent-gradient-hover);
  box-shadow: var(--shadow-xl);
}

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

/* ============================================
   Section Headers
   ============================================ */

.section__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Project Grid
   ============================================ */

.project-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.project-card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--background-secondary);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  overflow: hidden;
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-hover);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card__icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  transition: transform var(--transition-base);
  display: inline-block;
}

.project-card:hover .project-card__icon {
  transform: scale(1.1) rotate(5deg);
}

.project-card__tags {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.project-card__tag {
  font-size: var(--text-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  background: var(--background-tertiary);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-card__badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

.project-card__title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.project-card__description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--spacing-lg);
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.project-card__link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.project-card:hover .project-card__link svg {
  transform: translateX(4px);
}

/* ============================================
   About Section
   ============================================ */

.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1.5fr 1fr;
  }
}

.about__content p {
  margin-bottom: var(--spacing-lg);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

.about__principles {
  background: var(--background-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.about__principles h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-md);
}

.about__principles ul {
  list-style: none;
  padding: 0;
}

.about__principles li {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border);
}

.about__principles li:last-child {
  border-bottom: none;
}

.about__principles li::before {
  content: '→';
  margin-right: var(--spacing-sm);
  color: var(--accent-from);
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
  text-align: center;
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--text-xl);
  font-weight: 600;
  padding: var(--spacing-lg) var(--spacing-2xl);
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: white;
  transition: all var(--transition-base);
  margin-top: var(--spacing-lg);
}

.contact__email:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

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

.footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--border);
  margin-top: var(--spacing-4xl);
}

.footer__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer p {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

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

@media (max-width: 768px) {
  .nav__links {
    gap: var(--spacing-md);
  }

  .nav__link {
    font-size: var(--text-xs);
  }

  .hero {
    padding: var(--spacing-3xl) 0;
  }

  .hero__cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .footer__container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .nav__brand {
    font-size: var(--text-base);
  }

  .theme-toggle {
    width: 36px;
    height: 36px;
  }
}