:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #3b82f6;
  --success: #10b981;
  --danger: #ef4444;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  --transition: all 0.2s ease;
}

body.dark-mode {
  --bg-primary: #1f2937;
  --bg-secondary: #111827;
  --bg-tertiary: #374151;
  
  --text-primary: #ffffff;
  --text-secondary: #e5e7eb;
  --text-tertiary: #9ca3af;
  
  --border-color: #374151;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.6);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.7);
}

body.dark-mode .hero {
  background: linear-gradient(135deg, #1e40af, #1d4ed8);
}

body.dark-mode .status-badge {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

body.dark-mode .skill-card,
body.dark-mode .goal-card,
body.dark-mode .friend-card,
body.dark-mode .interest-item {
  background: var(--bg-primary);
  border-color: var(--border-color);
}

body.dark-mode .skill-card:hover,
body.dark-mode .goal-card:hover,
body.dark-mode .friend-card:hover,
body.dark-mode .interest-item:hover {
  border-color: var(--primary);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.2);
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== NAVIGATION ===== */
.navbar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
}

.nav-brand:hover {
  color: var(--primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: var(--transition);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -1.25rem;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  border: none;
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--primary);
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  padding: 4rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.profile-image-wrapper {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.profile-image {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 4px solid white;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  object-fit: cover;
}

.status-badge {
  position: absolute;
  bottom: 0;
  right: 0;
  background: white;
  color: var(--text-primary);
  padding: 0.375rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  box-shadow: var(--shadow-md);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: white;
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 0.25rem;
}

/* ===== MAIN CONTENT ===== */
.main-content {
  padding: 3rem 0;
}

.section {
  margin-bottom: 4rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-line {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  margin: 0 auto;
  border-radius: 2px;
}

/* ===== ABOUT SECTION ===== */
.about-content {
  display: grid;
  gap: 3rem;
}

.about-text {
  max-width: 800px;
  margin: 0 auto;
}

.about-text p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.skill-card i {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.skill-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.skill-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ===== GOALS SECTION ===== */
.goals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.goal-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.goal-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.goal-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.goal-icon i {
  font-size: 1.75rem;
  color: white;
}

.goal-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.goal-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== FRIENDS SECTION ===== */
.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.friend-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.friend-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.friend-card img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.friend-info {
  padding: 1.5rem;
  text-align: center;
}

.friend-info h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.friend-info p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.friend-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.friend-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: var(--transition);
}

.friend-social a:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

/* ===== INTERESTS SECTION ===== */
.interests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.interest-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  transition: var(--transition);
}

.interest-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.interest-item i {
  font-size: 2rem;
  color: var(--primary);
}

.interest-item span {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-menu {
    gap: 1rem;
  }
  
  .hero {
    padding: 3rem 1.5rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-stats {
    gap: 2rem;
  }
  
  .section-header h2 {
    font-size: 1.75rem;
  }
  
  .skills-grid,
  .goals-grid,
  .friends-grid {
    grid-template-columns: 1fr;
  }
  
  .interests-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }
  
  .footer .container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .profile-image {
    width: 120px;
    height: 120px;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .stat-value {
    font-size: 1.5rem;
  }
}

/* ===== HERO SMALL VARIANT ===== */
.hero-small {
  padding: 3rem 1.5rem;
}

/* ===== CONTACT PAGE ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.contact-form-section,
.contact-info-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-group label i {
  color: var(--primary);
}

.form-group input,
.form-group textarea {
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.contact-icon i {
  font-size: 1.25rem;
  color: white;
}

.contact-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.contact-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
}

.contact-link:hover {
  color: var(--primary-dark);
}

.social-section {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.social-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.social-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  transform: translateY(-2px);
}

.social-link i {
  font-size: 1.125rem;
}

.availability-card {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.availability-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.availability-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.availability-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.response-time {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.response-time i {
  color: var(--primary);
}

/* ===== REDIRECT PAGES ===== */
.redirect-page {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  padding: 4rem 0;
}

.redirect-card {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  box-shadow: var(--shadow-lg);
}

.redirect-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.redirect-icon i {
  font-size: 2.5rem;
  color: white;
}

.redirect-card h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.redirect-card > p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
}

.feature-item i {
  font-size: 1.25rem;
  color: var(--primary);
}

.shop-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.shop-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.shop-stat .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.shop-stat .stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.redirect-note {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-top: 1.5rem;
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 10000;
  transform: translateX(400px);
  transition: transform 0.3s ease;
  min-width: 300px;
}

.toast.show {
  transform: translateX(0);
}

.toast i {
  font-size: 1.25rem;
  color: var(--success);
}

#toast-message {
  font-weight: 500;
  color: var(--text-primary);
}

/* ===== RESPONSIVE - CONTACT & REDIRECT ===== */
@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .shop-stats {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .redirect-card {
    padding: 2rem 1.5rem;
  }
  
  .redirect-card h1 {
    font-size: 1.75rem;
  }
  
  .social-links {
    grid-template-columns: 1fr;
  }
}