/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #0f172a;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --background-color: #ffffff;
  --background-light: #f8fafc;
  --background-dark: #0f172a;
  --border-color: #e2e8f0;
  --shadow-color: rgba(15, 23, 42, 0.1);
  
  /* Typography */
  --font-family: 'Inter', sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --nav-height: 80px;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: 2px;
}

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-weight: 500;
  border-radius: var(--border-radius);
  cursor: pointer;
  border: none;
  text-align: center;
  font-size: var(--font-size-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

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

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

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--nav-height);
}

.nav-logo a {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  font-weight: 500;
  color: var(--text-primary);
  transition: color var(--transition-fast);
  position: relative;
}

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

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

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

/* External link styling - remove the hover underline animation */
.nav-link[target="_blank"]::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: all var(--transition-normal);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f8fafc;
  position: relative;
}

.hero-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.hero-content {
  /* No animation for professional look */
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

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

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
}

/* ===== PROFESSIONAL SIDEBAR ===== */
.hero-sidebar {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.expertise-areas h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: var(--spacing-sm);
}

.expertise-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.expertise-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--background-light);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
}

.expertise-item i {
  font-size: 1.2rem;
  color: var(--primary-color);
  width: 24px;
  text-align: center;
}

.expertise-item span {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-primary);
}

/* Remove all fancy styling */
.hero-image,
.tech-visualization,
.tech-stack-visual,
.tech-layer,
.tech-node,
.connecting-lines,
.ai-layer,
.data-layer,
.cloud-layer,
.devops-layer {
  display: none;
}

.scroll-indicator {
  display: none;
}

.scroll-arrow {
  display: none;
}

/* ===== ABOUT SECTION ===== */
.about {
  padding: var(--spacing-3xl) 0;
  background: var(--background-color);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-text p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.about-stats {
  display: flex;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-base);
  color: var(--text-light);
  font-weight: 500;
}

.about-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-img-placeholder {
  width: 300px;
  height: 300px;
  background: url('../AI.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  border: 3px solid white;
}

/* ===== SKILLS SECTION ===== */
.skills {
  padding: var(--spacing-3xl) 0;
  background: var(--background-light);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.skill-category {
  background: white;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 20px var(--shadow-color);
}

.skill-category h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
}

.skill-tag {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ===== PROJECTS SECTION ===== */
.projects {
  padding: var(--spacing-3xl) 0;
  background: var(--background-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.project-card {
  background: white;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 20px var(--shadow-color);
  text-align: center;
  border: 1px solid var(--border-color);
}

.project-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  color: white;
  font-size: var(--font-size-2xl);
}

.project-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
}

.project-tech span {
  background: var(--background-light);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
}

/* ===== CONTACT SECTION ===== */
.contact {
  padding: var(--spacing-3xl) 0;
  background: var(--background-light);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.contact-info p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-lg);
  color: var(--text-primary);
}

.contact-method i {
  color: var(--primary-color);
  width: 24px;
}

.contact-method a {
  color: var(--primary-color);
  text-decoration: underline;
}

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

.contact-form {
  background: white;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 20px var(--shadow-color);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

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

/* ===== FOOTER ===== */
.footer {
  background: var(--background-dark);
  color: white;
  padding: var(--spacing-2xl) 0;
}

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

.footer-text p {
  margin-bottom: var(--spacing-sm);
}

.footer-text p:first-child {
  font-weight: 500;
}

.footer-text p:last-child {
  color: var(--text-light);
  font-size: 0.875rem;
}

.footer-social {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: all var(--transition-normal);
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-3xl: 1.5rem;
    --spacing-3xl: 2rem;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: white;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: left var(--transition-normal);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-2xl);
  }

  .hero-image {
    order: -1;
    height: 300px;
  }

  .floating-elements {
    width: 250px;
    height: 250px;
  }

  .floating-element {
    width: 50px;
    height: 50px;
  }

  .floating-element i {
    font-size: var(--font-size-xl);
  }

  .hero-buttons {
    justify-content: center;
    flex-wrap: wrap;
  }

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

  .about-stats {
    justify-content: center;
  }

  .about-img-placeholder {
    width: 200px;
    height: 200px;
    font-size: 4rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .about-stats {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
  }

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

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

/* ===== SCROLL BEHAVIOR ===== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}