/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  transition: all 0.3s ease;
  min-height: 100vh;
}

/* CSS Variables for Theme */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #dbeafe;
  --accent-lighter: #f0f9ff;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --border-color: #334155;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --accent-light: #1e3a8a;
  --accent-lighter: #1e293b;
  --gradient: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
}

body {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Navigation */
.navbar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

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

.nav-brand {
  font-size: 1.25rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-primary);
}

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

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
  margin: 0;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  transition: all 0.2s;
}

.nav-link:hover {
  color: var(--accent);
  background-color: var(--accent-light);
}

.theme-toggle {
  background: var(--accent-light);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--accent);
  color: white;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: var(--bg-primary);
}

/* Hero Section */
.hero {
  background: var(--gradient);
  color: white;
  text-align: center;
  padding: 6rem 0;
  margin-bottom: 0;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 1rem;
}

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

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

.btn-outline {
  background: transparent;
  color: white;
  border-color: white;
}

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

.btn-link {
  background: none;
  color: white;
  text-decoration: underline;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  align-items: start;
  max-width: 800px;
  margin: 0 auto;
}

.profile-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  transition: all 0.2s;
}

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

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

.card p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.card .meta {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 0.5rem;
  transition: all 0.2s;
  color: var(--text-primary);
}

.skill-item:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.skill-icon {
  width: 24px;
  height: 24px;
}

/* Typography */
h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

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

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

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  margin-top: 4rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    box-shadow: var(--shadow);
  }

  .nav-menu.active {
    display: flex;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero {
    padding: 4rem 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .btn-group {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 250px;
    text-align: center;
  }

  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.5rem;
  }

  .profile-image {
    width: 150px;
    height: 150px;
    margin: 0 auto;
  }

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

  .section {
    padding: 2rem 0;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .card {
    padding: 1rem;
  }
}

/* Animations */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.typing-cursor::after {
  content: "|";
  animation: blink 1s infinite;
}

/* Error Page */
.error-content {
  text-align: center;
  padding: 4rem 0;
}

.error-content h2 {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* Utility Classes */
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1rem; }
.hidden { display: none; }

/* Contact Form */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-content h2 {
  margin-bottom: 2rem;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 2rem;
  box-shadow: var(--shadow);
  text-align: left;
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

#recaptchaWidget {
  display: flex;
  justify-content: center;
  margin: 1.5rem 0;
}

.form-submit {
  text-align: center;
  margin-top: 1.5rem;
}

.contact-form .btn {
  min-width: 150px;
}

/* Alert Messages */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1.5rem;
  border: 1px solid transparent;
}

.alert-success {
  background-color: #d1fae5;
  color: #065f46;
  border-color: #10b981;
}

.alert-error {
  background-color: #fee2e2;
  color: #991b1b;
  border-color: #ef4444;
}

[data-theme="dark"] .alert-success {
  background-color: #064e3b;
  color: #a7f3d0;
  border-color: #059669;
}

[data-theme="dark"] .alert-error {
  background-color: #7f1d1d;
  color: #fecaca;
  border-color: #dc2626;
}

/* Contact Form Mobile Responsive */
@media (max-width: 768px) {
  .contact-form {
    padding: 1.5rem;
  }
  
  .contact-content {
    padding: 0 1rem;
  }
}