/* ===========================
   Global Styles & Reset
   =========================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #10b981;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-accent: #f3f4f6;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  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="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>');
  opacity: 0.4;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.name {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.025em;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-xs);
  opacity: 0.95;
  line-height: 1.8;
}

.experience {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

.contact {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: white;
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.contact-link:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact-link svg {
  flex-shrink: 0;
}

.resume-download {
  margin-top: var(--spacing-lg);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: white;
  color: var(--primary-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.download-btn:hover {
  background: var(--bg-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* ===========================
   Section Styles
   =========================== */
section {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

section:nth-child(even) {
  background: var(--bg-secondary);
}

.section-title {
  font-size: 2.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: 2px;
}

/* ===========================
   About Section
   =========================== */
.about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

/* ===========================
   Skills Section
   =========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.skill-category {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.skill-category:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.skill-category h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.skill-category h3::before {
  content: '▸';
  color: var(--primary-color);
  font-weight: bold;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.tag {
  display: inline-block;
  background: var(--bg-accent);
  color: var(--text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.tag:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.tag.highlight {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  font-weight: var(--font-weight-semibold);
}

.tech-tag {
  display: inline-block;
  background: var(--bg-secondary);
  color: var(--primary-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--primary-color);
}

/* ===========================
   Experience Section
   =========================== */
.job {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary-color);
}

.job-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-md);
}

.job-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.company {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
  font-size: 1.125rem;
}

.duration {
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  background: var(--bg-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.job-responsibilities {
  list-style: none;
  padding-left: 0;
}

.job-responsibilities li {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  position: relative;
  color: var(--text-secondary);
  line-height: 1.7;
}

.job-responsibilities li::before {
  content: '●';
  color: var(--primary-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* ===========================
   Projects Section
   =========================== */
.project-detail {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.project-detail:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.project-detail h3 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.project-overview {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
  font-size: 1rem;
}

.project-accomplishments h4 {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.project-accomplishments ul {
  list-style: none;
  padding-left: 0;
}

.project-accomplishments li {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  position: relative;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

/* ===========================
   Achievements Section
   =========================== */
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.achievement-card {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.achievement-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.achievement-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.achievement-card h3 {
  font-size: 1.75rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.achievement-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

/* ===========================
   Education Section
   =========================== */
.education-item {
  background: var(--bg-primary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary-color);
}

.education-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-sm);
  gap: var(--spacing-md);
}

.education-item h3 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.institution {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
  font-size: 1.125rem;
}

.grade {
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  margin-top: var(--spacing-xs);
}

/* ===========================
   Footer
   =========================== */
.footer {
  background: var(--text-primary);
  color: white;
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.footer p {
  margin: 0;
  opacity: 0.8;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
  .name {
    font-size: 2rem;
  }
  
  .title {
    font-size: 1rem;
  }
  
  .contact {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .contact-link {
    width: 100%;
    justify-content: center;
  }
  
  .job-header,
  .education-header {
    flex-direction: column;
  }
  
  .duration {
    align-self: flex-start;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .skills-grid,
  .achievement-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .name {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
  body {
    background: white;
  }
  
  .hero {
    background: var(--primary-color);
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
  
  .download-btn {
    display: none;
  }
  
  section {
    page-break-inside: avoid;
  }
  
  .project-detail,
  .achievement-card,
  .skill-category {
    page-break-inside: avoid;
  }
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero,
.section-title,
.skill-category,
.project-detail,
.achievement-card {
  animation: fadeIn 0.6s ease-out;
}