/* ===== CSS VARIABLES ===== */
:root {
  /* Primary Colors - Tech-inspired blues and greens */
  --primary-color: #0066cc;
  --primary-light: #3385d6;
  --primary-dark: #0052a3;
  --secondary-color: #00b894;
  --secondary-light: #00d2a0;
  --accent-color: #6c5ce7;
  
  /* Neutral Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-dark: #1a1a1a;
  --text-primary: #2d3436;
  --text-secondary: #636e72;
  --text-light: #b2bec3;
  --text-white: #ffffff;
  
  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-secondary: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  --gradient-dark: linear-gradient(135deg, #2d3436, #636e72);
  
  /* Shadows */
  --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
  --shadow-heavy: 0 10px 40px rgba(0, 0, 0, 0.2);
  
  /* Border Radius */
  --border-radius: 12px;
  --border-radius-lg: 20px;
  
  /* Transitions */
  --transition-fast: 0.3s ease;
  --transition-medium: 0.5s ease;
  
  /* Font Weights */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: var(--font-regular);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== UTILITY CLASSES ===== */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: var(--font-medium);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-white);
  box-shadow: var(--shadow-light);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

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

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

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: all var(--transition-fast);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo a {
  font-size: 1.5rem;
  font-weight: var(--font-bold);
  text-decoration: none;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: var(--font-medium);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle .bar {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition-fast);
  border-radius: 3px;
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  padding-top: 70px;
}

.hero-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 2rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: var(--font-bold);
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-weight: var(--font-medium);
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-social {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-light);
}

.social-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-medium);
}

.hero-avatar {
  position: relative;
  display: flex;
  justify-content: center;
}

.avatar-img {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-heavy);
  border: 4px solid var(--bg-primary);
}

.avatar-ring {
  position: absolute;
  width: 320px;
  height: 320px;
  border: 3px solid transparent;
  background: var(--gradient-primary);
  border-radius: 50%;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: -1;
  animation: rotate 10s linear infinite;
}

@keyframes rotate {
  from { transform: translateX(-50%) rotate(0deg); }
  to { transform: translateX(-50%) rotate(360deg); }
}

.hero-scroll {
  text-align: center;
  animation: bounce 2s infinite;
}

.scroll-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

/* ===== SECTION HEADERS ===== */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: var(--font-bold);
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== ABOUT SECTION ===== */
.about {
  padding: 100px 0;
  background: var(--bg-primary);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-paragraph {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
}

.stat h3 {
  font-size: 2rem;
  font-weight: var(--font-bold);
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat p {
  color: var(--text-secondary);
  font-weight: var(--font-medium);
}

.about-img-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-medium);
}

.about-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.about-img-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 102, 204, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.about-img-container:hover .about-img-overlay {
  opacity: 1;
}

.about-img-container:hover .about-img {
  transform: scale(1.1);
}

.overlay-text {
  text-align: center;
  color: var(--text-white);
}

.overlay-text i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  display: block;
}

/* ===== SKILLS SECTION ===== */
.skills {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-medium);
  transition: transform var(--transition-fast);
}

.skill-category:hover {
  transform: translateY(-5px);
}

.category-title {
  font-size: 1.3rem;
  font-weight: var(--font-semibold);
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.category-title i {
  color: var(--primary-color);
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  cursor: default;
}

.skill-item:hover {
  background: var(--gradient-primary);
  color: var(--text-white);
  transform: translateY(-2px);
}

.skill-item i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
  transition: color var(--transition-fast);
}

.skill-item:hover i {
  color: var(--text-white);
}

.skill-item span {
  font-weight: var(--font-medium);
  font-size: 0.9rem;
}

/* ===== PROJECTS SECTION ===== */
.projects {
  padding: 100px 0;
  background: var(--bg-primary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.project-card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-medium);
  overflow: hidden;
  transition: all var(--transition-fast);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

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

.project-image {
  height: 200px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 3rem;
}

.project-content {
  padding: 2rem;
}

.project-title {
  font-size: 1.4rem;
  font-weight: var(--font-semibold);
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: var(--font-medium);
}

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

.project-link {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.project-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-light);
}

.projects-cta {
  text-align: center;
}

/* ===== CONTACT SECTION ===== */
.contact {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3,
.contact-form h3 {
  font-size: 1.5rem;
  font-weight: var(--font-semibold);
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  align-items: flex-start;
}

.contact-item i {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  flex-shrink: 0;
}

.contact-item h4 {
  font-weight: var(--font-semibold);
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-secondary);
  margin: 0;
}

.contact-item span {
  color: var(--text-light);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.social-links .social-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-light);
  transition: all var(--transition-fast);
  width: auto;
  height: auto;
}

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

.social-links .social-link span {
  font-weight: var(--font-medium);
}

/* ===== FORM STYLES ===== */
.form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.form input,
.form textarea {
  padding: 1rem;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

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

/* ===== FOOTER ===== */
.footer {
  padding: 2rem 0;
  background: var(--bg-dark);
  color: var(--text-white);
  text-align: center;
}

.footer-content p {
  margin-bottom: 0.5rem;
}

.footer-content p:last-child {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .hero-content,
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .avatar-img {
    width: 250px;
    height: 250px;
  }
  
  .avatar-ring {
    width: 270px;
    height: 270px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--bg-primary);
    width: 100%;
    text-align: center;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-medium);
    padding: 2rem 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .avatar-img {
    width: 200px;
    height: 200px;
  }
  
  .avatar-ring {
    width: 220px;
    height: 220px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .skills-list {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .avatar-img {
    width: 150px;
    height: 150px;
  }
  
  .avatar-ring {
    width: 170px;
    height: 170px;
  }
}

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

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== SCROLL ANIMATIONS ===== */
.section {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.section.visible {
  opacity: 1;
  transform: translateY(0);
}