/* ===================================================================
 * Clean Platform Engineer Portfolio
 * Simple, Modern, and Cohesive Design
 * =================================================================== */

/* ===================================================================
 * # RESET AND BASE STYLES
 * =================================================================== */

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

html {
  font-size: 62.5%; /* 10px base */
  scroll-behavior: smooth;
}

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

/* ===================================================================
 * # DESIGN SYSTEM - UNIFIED COLOR PALETTE
 * =================================================================== */

:root {
  /* Primary Colors - Professional Blue */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Semantic Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  /* Application Colors */
  --bg-primary: var(--gray-50);
  --bg-secondary: var(--gray-100);
  --bg-dark: var(--gray-900);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-muted: var(--gray-500);
  --border: var(--gray-200);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Spacing System */
  --space-1: 0.4rem;
  --space-2: 0.8rem;
  --space-3: 1.2rem;
  --space-4: 1.6rem;
  --space-5: 2rem;
  --space-6: 2.4rem;
  --space-8: 3.2rem;
  --space-10: 4rem;
  --space-12: 4.8rem;
  --space-16: 6.4rem;
  --space-20: 8rem;

  /* Border Radius */
  --radius-sm: 0.4rem;
  --radius: 0.8rem;
  --radius-lg: 1.2rem;
  --radius-xl: 1.6rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: all 0.2s ease-in-out;
}

/* ===================================================================
 * # TYPOGRAPHY
 * =================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: 4.8rem; }
h2 { 
  font-size: 3.6rem;
  text-align: center;
  margin-bottom: var(--space-12);
  color: var(--text-primary);
}
h3 { font-size: 2.4rem; }
h4 { font-size: 2rem; }
h5 { font-size: 1.8rem; }
h6 { font-size: 1.6rem; }

p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-700);
}

/* ===================================================================
 * # COMPONENTS
 * =================================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 1.6rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-600);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-700);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  border-color: var(--primary-600);
  color: var(--primary-600);
  background: transparent;
}

.btn-outline:hover {
  background: var(--primary-600);
  color: white;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Section */
.section {
  padding: var(--space-20) 0;
}

.section-padding {
  padding: var(--space-20) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.8rem;
  margin-bottom: var(--space-12);
}

/* ===================================================================
 * # HEADER - MINIMAL & ELEGANT
 * =================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(37, 99, 235, 0.1);
  z-index: 1000;
  transition: var(--transition);
  height: 60px;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  height: 100%;
}

.nav-brand {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-600);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  transition: var(--transition);
  font-size: 1.4rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-600);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-600);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary-600);
  margin: 2px 0;
  transition: var(--transition);
}

/* Header scroll effect */
.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  border-bottom-color: rgba(37, 99, 235, 0.15);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-list {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
  }
  
  .nav-list.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    padding: var(--space-4);
    text-align: center;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
}

/* ===================================================================
 * # HERO SECTION - BOLD & MINIMAL
 * =================================================================== */

/* ===================================================================
 * # HERO SECTION - MODERN INTUITIVE DESIGN
 * =================================================================== */

.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  display: flex;
  align-items: center;
  padding: var(--space-20) 0;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Hero Introduction */
.hero-intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.hero-greeting {
  animation: fadeInUp 0.6s ease-out;
}

.greeting-text {
  font-size: 1.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-name {
  display: flex;
  flex-direction: column;
  line-height: 0.9;
  animation: fadeInUp 0.6s ease-out 0.2s both;
  text-align: left;
}

.first-name {
  font-size: 5.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -2px;
}

.last-name {
  font-size: 5.5rem;
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: -2px;
}

.hero-role {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  animation: fadeInUp 0.6s ease-out 0.4s both;
  align-items: flex-start;
}

.role-title {
  font-size: 2.8rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-400) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
  text-align: left;
}

.company-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--primary-50);
  color: var(--primary-700);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 1.4rem;
  font-weight: 600;
  border: 1px solid var(--primary-200);
  width: fit-content;
}

/* Hero Description */
.hero-description {
  animation: fadeInUp 0.6s ease-out 0.6s both;
}

.hero-tagline {
  font-size: 2rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
}

.highlight {
  color: var(--primary-600);
  font-weight: 600;
}

/* Hero Highlights */
.hero-highlights {
  display: flex;
  gap: var(--space-6);
  animation: fadeInUp 0.6s ease-out 0.8s both;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: white;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.highlight-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-100);
  color: var(--primary-600);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.highlight-content {
  display: flex;
  flex-direction: column;
}

.highlight-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.highlight-label {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Hero Actions */
.hero-actions {
  display: flex;
  gap: var(--space-4);
  animation: fadeInUp 0.6s ease-out 1s both;
}

.btn-primary, .btn-secondary, .btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.6rem;
  text-decoration: none;
  transition: var(--transition);
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--primary-600);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background: white;
  color: var(--primary-600);
  border-color: var(--primary-200);
}

.btn-secondary:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary-600);
  border-color: var(--primary-400);
}

.btn-outline:hover {
  background: var(--primary-600);
  color: white;
  transform: translateY(-2px);
}

/* Hero Scroll Indicator */
.hero-scroll {
  margin-top: var(--space-8);
  animation: fadeInUp 0.6s ease-out 1.2s both;
}

.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.4rem;
  transition: var(--transition);
}

.scroll-indicator:hover {
  color: var(--primary-600);
}

.scroll-indicator i {
  animation: bounce 2s infinite;
}

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

/* Hero Visual */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  position: relative;
}

/* Tech Stack */
.tech-stack {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  width: 100%;
  max-width: 400px;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  background: white;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  animation: fadeInUp 0.6s ease-out both;
}

.tech-item:nth-child(1) { animation-delay: 0.4s; }
.tech-item:nth-child(2) { animation-delay: 0.6s; }
.tech-item:nth-child(3) { animation-delay: 0.8s; }
.tech-item:nth-child(4) { animation-delay: 1s; }
.tech-item:nth-child(5) { animation-delay: 1.2s; }
.tech-item:nth-child(6) { animation-delay: 1.4s; }

.tech-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.tech-item i {
  font-size: 2.4rem;
  color: var(--primary-600);
}

.tech-item span {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Hero Image */
.hero-image {
  animation: fadeInUp 0.6s ease-out 0.6s both;
}

.image-container {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.profile-ring {
  position: absolute;
  top: -15px;
  left: -15px;
  right: -15px;
  bottom: -15px;
  border: 2px solid var(--primary-300);
  border-radius: 50%;
  opacity: 0.6;
  animation: rotate 8s linear infinite;
}

.profile-ring::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border: 1px solid var(--primary-100);
  border-radius: 50%;
  opacity: 0.4;
}

@keyframes rotate {
  from { 
    transform: rotate(0deg);
    opacity: 0.6;
  }
  50% {
    opacity: 0.9;
  }
  to { 
    transform: rotate(360deg);
    opacity: 0.6;
  }
}

.profile-pic {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid white;
  box-shadow: var(--shadow-lg);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: white;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-top: var(--space-4);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

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

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

.status-indicator span {
  font-size: 1.3rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    gap: var(--space-10);
    padding: 0 var(--space-4);
  }
  
  .first-name, .last-name {
    font-size: 4.5rem;
  }
  
  .role-title {
    font-size: 2.4rem;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-16) 0;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
    padding: 0 var(--space-4);
  }
  
  .hero-visual {
    order: -1;
  }
  
  .hero-intro {
    gap: var(--space-3);
  }
  
  .hero-name {
    text-align: center;
  }
  
  .hero-role {
    align-items: center;
  }
  
  .first-name, .last-name {
    font-size: 3.5rem;
  }
  
  .role-title {
    font-size: 2rem;
    text-align: center;
  }
  
  .hero-tagline {
    font-size: 1.6rem;
    line-height: 1.6;
  }
  
  .hero-highlights {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .highlight-item {
    padding: var(--space-3);
  }
  
  .hero-actions {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .btn-primary, .btn-secondary, .btn-outline {
    width: 100%;
    justify-content: center;
    padding: var(--space-4) var(--space-5);
    font-size: 1.5rem;
  }
  
  .tech-stack {
    grid-template-columns: repeat(2, 1fr);
    max-width: 280px;
    gap: var(--space-3);
  }
  
  .tech-item {
    padding: var(--space-3);
  }
  
  .tech-item i {
    font-size: 2rem;
  }
  
  .tech-item span {
    font-size: 1.1rem;
  }
  
  .profile-pic {
    width: 180px;
    height: 180px;
  }
  
  .status-indicator {
    padding: var(--space-2) var(--space-3);
    margin-top: var(--space-3);
  }
  
  .status-indicator span {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: var(--space-12) 0;
  }
  
  .hero-container {
    gap: var(--space-6);
    padding: 0 var(--space-3);
  }
  
  .first-name, .last-name {
    font-size: 2.8rem;
  }
  
  .role-title {
    font-size: 1.8rem;
  }
  
  .hero-tagline {
    font-size: 1.4rem;
  }
  
  .company-badge {
    font-size: 1.2rem;
    padding: var(--space-1) var(--space-3);
  }
  
  .highlight-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
  
  .highlight-number {
    font-size: 1.6rem;
  }
  
  .highlight-label {
    font-size: 1.1rem;
  }
  
  .tech-stack {
    grid-template-columns: 1fr 1fr;
    max-width: 240px;
  }
  
  .profile-pic {
    width: 150px;
    height: 150px;
  }
}

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

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .hero {
    min-height: 90vh;
    padding: var(--space-8) 0;
  }
  
  .hero-name {
    font-size: 3.5rem;
  }
  
  .hero-title {
    font-size: 1.6rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .tech-icon {
    width: 30px;
    height: 30px;
    font-size: 1.4rem;
  }
  
  .stat-card {
    justify-content: center;
  }
}

.hero-greeting {
  color: var(--primary-600);
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: var(--space-3);
  opacity: 0.9;
}

.hero-title {
  font-size: 5.6rem;
  font-weight: 900;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.hero-role {
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
  opacity: 0.8;
}

.hero-subtitle {
  font-size: 1.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.6;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-top: var(--space-8);
  opacity: 0.7;
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary-600);
  display: block;
}

.hero-stat-label {
  font-size: 1.2rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* ===================================================================
 * # ABOUT SECTION
 * =================================================================== */

.about {
  background: white;
  padding: var(--space-20) 0;
}

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

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.about-text > p {
  font-size: 1.8rem;
  line-height: 1.7;
  color: var(--text-secondary);
  text-align: center;
}

.about-mission,
.career-journey {
  background: var(--gray-50);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-600);
  text-align: left;
}

.about-mission h3,
.career-journey h3 {
  color: var(--primary-600);
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.about-mission p,
.career-journey p {
  font-size: 1.6rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

@media (max-width: 768px) {
  .about {
    padding: var(--space-16) 0;
  }
}

.about-image {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.about-text {
  font-size: 1.8rem;
  line-height: 1.7;
}

.about-text p {
  margin-bottom: var(--space-6);
}

.about-text strong {
  color: var(--primary-600);
  font-weight: 600;
}

/* ===================================================================
 * # EXPERIENCE SECTION
 * =================================================================== */

.experience {
  background: var(--bg-primary);
}

.experience-timeline {
  max-width: 800px;
  margin: 0 auto;
}

.experience-item {
  background: white;
  border-radius: var(--radius-large);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  border-left: 4px solid var(--primary-600);
  transition: var(--transition);
}

.experience-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.experience-role {
  flex: 1;
}

.experience-header h3 {
  color: var(--primary-600);
  font-size: 2.2rem;
  margin-bottom: var(--space-1);
  font-weight: 700;
}

.experience-header h4 {
  color: var(--text-primary);
  font-size: 1.8rem;
  margin-bottom: 0;
  font-weight: 600;
  opacity: 0.9;
}

.experience-period {
  background: var(--primary-100);
  color: var(--primary-700);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-size: 1.4rem;
  font-weight: 600;
}

.experience-details ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience-details li {
  padding: var(--space-2) 0;
  color: var(--text-secondary);
  font-size: 1.5rem;
  line-height: 1.6;
  position: relative;
  padding-left: var(--space-6);
}

.experience-details li::before {
  content: '▶';
  position: absolute;
  left: 0;
  color: var(--primary-600);
  font-size: 1.2rem;
}

@media (max-width: 768px) {
  .experience {
    padding: var(--space-16) 0;
  }
  
  .experience-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .experience-item {
    padding: var(--space-5);
    margin-bottom: var(--space-5);
  }
  
  .experience-header h3 {
    font-size: 1.8rem;
  }
  
  .experience-header h4 {
    font-size: 1.5rem;
  }
  
  .experience-period {
    align-self: flex-start;
    font-size: 1.3rem;
  }
  
  .experience-details li {
    font-size: 1.4rem;
    line-height: 1.6;
    margin-bottom: var(--space-3);
  }
}

@media (max-width: 480px) {
  .experience {
    padding: var(--space-12) 0;
  }
  
  .experience-item {
    padding: var(--space-4);
    margin-bottom: var(--space-4);
  }
  
  .experience-header h3 {
    font-size: 1.6rem;
  }
  
  .experience-header h4 {
    font-size: 1.3rem;
  }
  
  .experience-period {
    font-size: 1.2rem;
  }
  
  .experience-details li {
    font-size: 1.3rem;
    padding-left: var(--space-3);
  }
}

/* ===================================================================
 * # PROJECTS SECTION
 * =================================================================== */

.projects {
  background: var(--bg-secondary);
  padding: var(--space-16) 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr !important;
  gap: var(--space-4);
  max-width: 1000px;
  margin: 0 auto;
}

.project-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-header h3 {
  color: var(--primary-600);
  font-size: 1.8rem;
  margin-bottom: 0;
}

.project-links {
  display: flex;
  gap: var(--space-3);
}

.project-link {
  color: var(--text-muted);
  font-size: 2rem;
  transition: var(--transition);
}

.project-link:hover {
  color: var(--primary-600);
}

.project-description {
  padding: var(--space-4);
  padding-bottom: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  font-size: 1.4rem;
}

.project-tech {
  padding: 0 var(--space-4) var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  background: var(--primary-100);
  color: var(--primary-700);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 1.3rem;
  font-weight: 500;
}

@media (max-width: 768px) {
  .projects {
    padding: var(--space-16) 0;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .project-card {
    margin-bottom: var(--space-4);
  }
  
  .project-header {
    padding: var(--space-4);
  }
  
  .project-header h3 {
    font-size: 1.8rem;
  }
  
  .project-description {
    padding: 0 var(--space-4);
    font-size: 1.4rem;
    line-height: 1.6;
  }
  
  .project-tech {
    padding: var(--space-4);
    gap: var(--space-2);
  }
  
  .tech-tag {
    font-size: 1.2rem;
    padding: var(--space-1) var(--space-3);
  }
}

@media (max-width: 480px) {
  .projects {
    padding: var(--space-12) 0;
  }
  
  .projects-grid {
    gap: var(--space-3);
  }
  
  .project-header {
    padding: var(--space-3);
  }
  
  .project-header h3 {
    font-size: 1.6rem;
  }
  
  .project-description {
    padding: 0 var(--space-3);
    font-size: 1.3rem;
  }
  
  .project-tech {
    padding: var(--space-3);
    flex-wrap: wrap;
  }
  
  .tech-tag {
    font-size: 1.1rem;
    padding: var(--space-1) var(--space-2);
  }
}

/* ===================================================================
 * # SKILLS SECTION
 * =================================================================== */

.skills {
  background: white;
  padding: var(--space-12) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr !important;
  gap: var(--space-4);
  max-width: 1200px;
  margin: 0 auto;
}

.skill-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

.skill-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-100);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
}

.skill-icon i {
  font-size: 1.8rem;
  color: var(--primary-600);
}

.skill-title {
  color: var(--text-primary);
  font-size: 1.6rem;
  margin-bottom: var(--space-2);
}

.skill-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  line-height: 1.6;
  font-size: 1.3rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.skill-tag {
  background: var(--primary-100);
  color: var(--primary-700);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 1.3rem;
  font-weight: 500;
}

@media (max-width: 768px) {
  .skills {
    padding: var(--space-16) 0;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .skill-card {
    padding: var(--space-5);
    text-align: center;
  }
  
  .skill-icon {
    margin: 0 auto var(--space-3);
  }
  
  .skill-title {
    font-size: 1.8rem;
    margin-bottom: var(--space-3);
  }
  
  .skill-desc {
    font-size: 1.4rem;
    line-height: 1.6;
    margin-bottom: var(--space-4);
  }
  
  .skill-tags {
    justify-content: center;
    gap: var(--space-2);
  }
  
  .skill-tag {
    font-size: 1.2rem;
    padding: var(--space-1) var(--space-3);
  }
}

@media (max-width: 480px) {
  .skills {
    padding: var(--space-12) 0;
  }
  
  .skills-grid {
    gap: var(--space-3);
  }
  
  .skill-card {
    padding: var(--space-4);
  }
  
  .skill-title {
    font-size: 1.6rem;
  }
  
  .skill-desc {
    font-size: 1.3rem;
  }
  
  .skill-tags {
    gap: var(--space-1);
  }
  
  .skill-tag {
    font-size: 1.1rem;
    padding: var(--space-1) var(--space-2);
  }
}

.project-content {
  padding: var(--space-6);
}

.project-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.project-highlights {
  list-style: none;
  margin-bottom: var(--space-6);
}

.project-highlights li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
}

.project-highlights li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
}

.project-links {
  display: flex;
  gap: var(--space-3);
}

.project-link {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--primary-600);
  color: var(--primary-600);
  border-radius: var(--radius);
  font-size: 1.4rem;
  font-weight: 500;
  transition: var(--transition);
}

.project-link:hover {
  background: var(--primary-600);
  color: white;
}

/* ===================================================================
 * # SKILLS SECTION
 * =================================================================== */

.skills {
  background: white;
}

.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

.skill-card {
  padding: var(--space-6);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
}

.skill-card:hover {
  border-color: var(--primary-600);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.skill-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  color: var(--primary-600);
  font-size: 2.4rem;
}

.skill-title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.skill-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.skill-tag {
  background: var(--primary-50);
  color: var(--primary-600);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 1.2rem;
  font-weight: 500;
  transition: var(--transition);
}

.skill-tag:hover {
  background: var(--primary-600);
  color: white;
  transform: scale(1.05);
}

/* ===================================================================
 * # CONTACT SECTION
 * =================================================================== */

.contact {
  background: var(--bg-secondary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

.contact-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
  color: inherit;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-100);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-600);
  font-size: 2rem;
}

.contact-details h4 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--text-primary);
}

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

.contact-cta {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  text-align: center;
}

.contact-cta h3 {
  font-size: 2.4rem;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.contact-cta p {
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.contact-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================================================
 * # FOOTER
 * =================================================================== */

.footer {
  background: var(--gray-900);
  color: white;
  padding: var(--space-12) 0 var(--space-6);
  text-align: center;
}

.footer-content {
  margin-bottom: var(--space-8);
}

.footer-title {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-desc {
  color: var(--gray-400);
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--gray-800);
  color: white;
  border-radius: var(--radius);
  transition: var(--transition);
  font-size: 1.4rem;
}

.social-link:hover {
  background: var(--primary-600);
  color: white;
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--gray-800);
  color: var(--gray-500);
}

/* ===================================================================
 * # RESPONSIVE DESIGN
 * =================================================================== */

/* General mobile responsiveness */
@media (max-width: 768px) {
  /* Base mobile styles */
  html { font-size: 56.25%; } /* 9px base */
  
  body {
    line-height: 1.6;
  }
  
  /* Container adjustments for mobile */
  .container {
    padding: 0 2rem;
  }
  
  /* Make all buttons touch-friendly */
  .btn {
    min-height: 44px;
    padding: 1.2rem 2rem;
    font-size: 1.6rem;
  }
  
  /* Touch-friendly links */
  a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  
  /* Improved text readability on mobile */
  p, li {
    font-size: 1.6rem;
    line-height: 1.8;
  }
  
  /* Mobile-friendly spacing */
  section {
    padding: 4rem 0;
  }
  
  .section-header {
    margin-bottom: 3rem;
  }
  
  /* Navigation for mobile */
  .header-nav {
    position: relative;
  }
  
  .nav-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    gap: 0;
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  
  .nav-list.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  /* Mobile hamburger menu */
  .mobile-menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 2.4rem;
    cursor: pointer;
    padding: 0.5rem;
  }
  
  /* Prevent horizontal scroll on mobile */
  html {
    overflow-x: hidden;
  }
  
  body {
    overflow-x: hidden;
  }
}

/* Extra small mobile devices */
@media (max-width: 480px) {
  html { font-size: 50%; } /* 8px base */
  
  .container {
    padding: 0 1.5rem;
  }
  
  /* Smaller buttons for very small screens */
  .btn {
    font-size: 1.4rem;
    padding: 1rem 1.5rem;
  }
  
  /* Tighter spacing */
  section {
    padding: 3rem 0;
  }
  
  .section-header {
    margin-bottom: 2rem;
  }
  
  /* Stack everything vertically */
  .row {
    flex-direction: column;
  }
  
  /* Ensure text is readable */
  h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
  }
}

  
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
@media (max-width: 768px) {
  .contact {
    padding: var(--space-16) 0;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .contact-info {
    order: 2;
  }
  
  .contact-cta {
    order: 1;
    text-align: center;
  }
  
  .contact-item {
    padding: var(--space-4);
  }
  
  .contact-item h4 {
    font-size: 1.6rem;
  }
  
  .contact-item p {
    font-size: 1.4rem;
  }
  
  .contact-buttons {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .btn {
    width: 100%;
    justify-content: center;
    padding: var(--space-4) var(--space-5);
  }
}

@media (max-width: 480px) {
  .contact {
    padding: var(--space-12) 0;
  }
  
  .contact-content {
    gap: var(--space-6);
  }
  
  .contact-item {
    padding: var(--space-3);
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
  
  .contact-icon {
    margin: 0 auto;
  }
  
  .contact-item h4 {
    font-size: 1.4rem;
  }
  
  .contact-item p {
    font-size: 1.3rem;
  }
  
  .contact-cta h3 {
    font-size: 1.8rem;
  }
  
  .contact-cta p {
    font-size: 1.3rem;
    line-height: 1.6;
  }
}
  
  /* Projects: 2x2 grid, Skills: 3x3 grid */
  .projects-grid {
    grid-template-columns: 1fr 1fr !important;
    max-width: 1000px;
    margin: 0 auto;
    gap: var(--space-4);
  }
  
  .skills-grid {
    grid-template-columns: 1fr 1fr 1fr !important;
    max-width: 1200px;
    margin: 0 auto;
    gap: var(--space-4);
  }


@media (max-width: 480px) {
  .container { padding: 0 var(--space-3); }
  
  .hero-title { font-size: 3.2rem; }
  .hero-role { font-size: 1.8rem; }
  .hero-subtitle { font-size: 1.6rem; }
  
  .contact-buttons,
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .footer-social {
    flex-direction: column;
    align-items: center;
  }
  
  .nav-brand {
    font-size: 1.6rem;
  }
}

/* ===================================================================
 * # UTILITY CLASSES
 * =================================================================== */

.text-center { text-align: center; }
.text-primary { color: var(--primary-600); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===================================================================
 * # CONTACT SECTION
 * =================================================================== */

.contact {
  background: var(--bg-secondary);
  padding: var(--space-20) 0;
}

/* ===================================================================
 * # FOOTER SECTION
 * =================================================================== */
.footer {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--space-10) 0;
  font-size: 1.6rem;
}
.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.footer-links {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-2);
}
.footer-links a {
  color: var(--primary-700);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-links a:hover {
  color: var(--primary-400);
  text-decoration: underline;
}
.footer-copy {
  color: var(--gray-500);
  font-size: 1.4rem;
}


.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--primary-100);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon i {
  font-size: 2rem;
  color: var(--primary-600);
}

.contact-details h4 {
  color: var(--text-primary);
  font-size: 1.8rem;
  margin-bottom: var(--space-1);
}

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

.contact-cta {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.contact-cta h3 {
  color: var(--primary-600);
  margin-bottom: var(--space-4);
}

.contact-cta p {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.contact-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .contact-buttons {
    flex-direction: column;
  }
}

/* ===================================================================
 * # FOOTER
 * =================================================================== */

.footer {
  background: var(--gray-900);
  color: white;
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  text-align: center;
  margin-bottom: var(--space-8);
}

.footer-title {
  color: white;
  font-size: 2.4rem;
  margin-bottom: var(--space-4);
}

.footer-desc {
  color: var(--gray-400);
  max-width: 500px;
  margin: 0 auto var(--space-6);
  line-height: 1.6;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--gray-400);
  transition: var(--transition);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
}

.social-link:hover {
  color: var(--primary-400);
  background: rgba(37, 99, 235, 0.1);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-800);
}

.footer-bottom p {
  color: var(--gray-500);
  margin: 0;
}