/* ========== VARIABLES ========== */
:root {
  /* Light Theme (Default) */
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --accent-color: #4895ef;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #ffffff;
  --bg-secondary: #f8f9fa;
  --border-color: #e9ecef;
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --danger-color: #f44336;
  --info-color: #2196f3;
  
  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-base: 16px;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-circle: 50%;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container */
  --container-max-width: 1200px;
  --container-padding: 1rem;
  
  /* Z-index */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-tooltip: 1060;
}

/* Dark Theme */
.dark-theme {
  --primary-color: #4cc9f0;
  --secondary-color: #4895ef;
  --accent-color: #4361ee;
  --text-color: #e9ecef;
  --text-light: #ced4da;
  --bg-color: #121212;
  --bg-secondary: #1e1e1e;
  --border-color: #2d2d2d;
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

a:hover {
  color: var(--secondary-color);
}

ul, ol {
  list-style: none;
}

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-md);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--text-color);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-xl);
  color: var(--text-color);
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 50px;
  height: 3px;
  background-color: var(--primary-color);
}

.section-description {
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
  text-align: center;
  color: var(--text-light);
}

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

/* ========== HEADER ========== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--bg-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: var(--z-index-fixed);
  transition: background-color var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin: 0;
  color: var(--primary-color);
}

nav ul {
  display: flex;
  gap: var(--spacing-lg);
}

nav a {
  font-weight: var(--font-weight-medium);
  color: var(--text-color);
  position: relative;
  padding: var(--spacing-xs) 0;
}

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

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

.theme-toggle button {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.2rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-circle);
  transition: background-color var(--transition-fast);
}

.theme-toggle button:hover {
  background-color: var(--border-color);
}
/* ========== HERO SECTION ========== */
.hero {
  padding: 160px 0 100px;
  background-color: var(--bg-color);
}

.hero .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
}

.hero-content {
  flex: 1;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.hero-content h2 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-medium);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

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

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  position: relative;
}

.profile-image {
  width: 300px;
  height: 300px;
  object-fit: cover;
  border-radius: var(--border-radius-circle);
  border: 5px solid var(--primary-color);
  box-shadow: var(--card-shadow);
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
}

.btn-primary:hover {
  background-color: var(--secondary-color);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.btn-outline:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.about-content {
  display: flex;
  gap: var(--spacing-xl);
  align-items: flex-start;
}

.about-text {
  flex: 2;
}

.about-info {
  flex: 1;
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--card-shadow);
}

.info-item {
  margin-bottom: var(--spacing-md);
}

.info-item h3 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--primary-color);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-circle);
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

/* ========== SKILLS SECTION ========== */
.skills {
  padding: var(--spacing-xxl) 0;
}

.skills-content {
  display: flex;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.skills-category {
  flex: 1;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--card-shadow);
}

.skills-category h3 {
  margin-bottom: var(--spacing-lg);
  color: var(--primary-color);
  text-align: center;
}

.skill-item {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.skill-item span:first-child {
  width: 100px;
  font-weight: var(--font-weight-medium);
}

.skill-bar {
  flex: 1;
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--border-radius-sm);
  margin: 0 var(--spacing-sm);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: var(--border-radius-sm);
}

.skill-percentage {
  width: 40px;
  text-align: right;
  font-size: 0.875rem;
  color: var(--text-light);
}

.other-skills {
  text-align: center;
}

.other-skills h3 {
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

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

.skill-tag {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  box-shadow: var(--card-shadow);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

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

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.project-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-normal);
}

.project-card:hover {
  transform: translateY(-10px);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: var(--spacing-md);
}

.project-link {
  display: flex;
  align-items: center;
  gap: 5px;
  background-color: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

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

.project-info {
  padding: var(--spacing-lg);
}

.project-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.project-description {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

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

.project-tag {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.75rem;
}

.view-more {
  text-align: center;
  margin-top: var(--spacing-xl);
}

/* ========== CONTACT SECTION ========== */
.contact {
  padding: var(--spacing-xxl) 0;
}

.contact-container {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
}

.contact-info {
  max-width: 500px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.contact-item h3 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.1rem;
}

/* ========== FOOTER ========== */
.footer {
  background-color: var(--bg-secondary);
  padding-top: var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.footer-logo h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.footer-links h3,
.footer-contact h3,
.footer-social h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.footer-links ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-light);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.footer-contact i {
  color: var(--primary-color);
}

.footer-bottom {
  padding: var(--spacing-md) 0;
  text-align: center;
}

.footer-bottom p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

/* ========== MODALS ========== */

/* Project Modal */
.project-modal {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: var(--z-index-modal);
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  overflow-y: auto;
}

.modal-container {
  position: relative;
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--card-shadow);
}

.modal-content {
  padding: var(--spacing-xl);
}

.modal-content h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.modal-description {
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.modal-gallery {
  margin-bottom: var(--spacing-xl);
}

.gallery-main {
  margin-bottom: var(--spacing-md);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  cursor: zoom-in;
}

.gallery-main img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  background-color: var(--bg-secondary);
  transition: transform var(--transition-normal);
}

.gallery-main img:hover {
  transform: scale(1.02);
}

.gallery-thumbs {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.gallery-thumbs img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

.gallery-thumbs img:hover {
  border-color: var(--primary-color);
  transform: translateY(-3px);
}

.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.modal-links {
  display: flex;
  gap: var(--spacing-md);
}

.close-modal {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: 2rem;
  color: var(--text-color);
  cursor: pointer;
  transition: color var(--transition-fast);
  z-index: 10;
}

.close-modal:hover {
  color: var(--primary-color);
}

/* Image Modal */
.image-modal {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: calc(var(--z-index-modal) + 1);
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
}

.image-modal .close-modal {
  color: white;
}

.modal-img {
  max-width: 90%;
  max-height: 90vh;
  border-radius: var(--border-radius-md);
  box-shadow: var(--card-shadow);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 992px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-content {
    order: 2;
  }
  
  .hero-image {
    order: 1;
    margin-bottom: var(--spacing-xl);
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .section-title::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .about-content,
  .skills-content,
  .contact-container {
    flex-direction: column;
  }
  
  .about-text {
    order: 2;
  }
  
  .about-info {
    order: 1;
    margin-bottom: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .header-container {
    height: 70px;
  }
  
  nav ul {
    gap: var(--spacing-md);
  }
  
  .project-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .hero-content h2 {
    font-size: 1.25rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .profile-image {
    width: 250px;
    height: 250px;
  }
  
  .project-grid {
    grid-template-columns: 1fr;
  }
}