/* =============== VARIABLES =============== */
:root {
  /* Color Palette - Modern & Professional */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary-color: #ec4899;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  
  /* Neutral Colors */
  --dark-bg: #0f172a;
  --dark-surface: #1e293b;
  --dark-card: #334155;
  --dark-text: #f1f5f9;
  --dark-text-secondary: #cbd5e1;
  
  --light-bg: #f8fafc;
  --light-surface: #ffffff;
  --light-card: #f1f5f9;
  --light-text: #1e293b;
  --light-text-secondary: #64748b;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.3);
  
  /* Borders */
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --border-radius-xl: 30px;
  --border-radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-bounce: 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Poppins', sans-serif;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 4rem;
  
  /* Layout */
  --header-height: 80px;
  --container-width: 1200px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --bg-color: var(--dark-bg);
  --surface-color: var(--dark-surface);
  --card-color: var(--dark-card);
  --text-color: var(--dark-text);
  --text-secondary: var(--dark-text-secondary);
  --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-color: var(--light-bg);
  --surface-color: var(--light-surface);
  --card-color: var(--light-card);
  --text-color: var(--light-text);
  --text-secondary: var(--light-text-secondary);
  --shadow-color: rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

/* =============== PRELOADER =============== */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.preloader-spinner {
  text-align: center;
}

.spinner-circle {
  width: 60px;
  height: 60px;
  border: 3px solid var(--surface-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 1s linear infinite;
}

.spinner-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

/* =============== PARTICLES BACKGROUND =============== */
.particles-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

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

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.section__subtitle {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--primary-color);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
  position: relative;
}

.section__subtitle::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background: var(--primary-color);
}

.section__title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  font-family: var(--font-secondary);
}

.section__divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  margin: 0 auto var(--spacing-lg);
  border-radius: var(--border-radius-full);
}

.section__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* =============== CONTAINER =============== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* =============== HEADER & NAVIGATION =============== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(var(--surface-color), 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-normal);
  border-bottom: 1px solid rgba(var(--text-color), 0.1);
  height: var(--header-height);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  height: 70px;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 var(--spacing-md);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--text-color);
  transition: transform var(--transition-normal);
}

.nav__logo:hover {
  transform: translateY(-2px);
}

.nav__logo-circle {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav__list {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-normal);
  position: relative;
}

.nav__link i {
  font-size: var(--font-size-lg);
}

.nav__link:hover,
.nav__link.active-link {
  color: var(--primary-color);
  background: rgba(var(--primary-color), 0.1);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
  border-radius: var(--border-radius-full);
}

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

/* Theme Toggle */
.nav__theme {
  margin-left: var(--spacing-lg);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--surface-color);
  border: 1px solid rgba(var(--text-color), 0.1);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-color);
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.theme-toggle-mobile {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--text-color);
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* Mobile Menu Toggle */
.nav__toggle,
.nav__close {
  display: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--text-color);
  background: none;
  border: none;
  padding: var(--spacing-xs);
}

/* =============== HOME SECTION =============== */
.home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
}

.home__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.home__content {
  max-width: 600px;
}

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

.home__subtitle {
  display: block;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.home__title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  font-family: var(--font-secondary);
}

.typewriter-container {
  margin-bottom: var(--spacing-lg);
  min-height: 60px;
}

.home__education {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--primary-color);
}

.typed-text {
  display: inline-block;
}

.cursor {
  display: inline-block;
  width: 3px;
  background-color: var(--primary-color);
  animation: blink 1s infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.home__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.home__description b {
  color: var(--text-color);
  font-weight: 600;
}

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

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius-full);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  cursor: pointer;
  font-size: var(--font-size-md);
}

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

.button--primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.button--secondary {
  background: transparent;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.button--secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Home Social */
.home__social {
  display: flex;
  gap: var(--spacing-md);
}

.home__social-link {
  position: relative;
  width: 50px;
  height: 50px;
  background: var(--surface-color);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  font-size: var(--font-size-xl);
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 1px solid rgba(var(--text-color), 0.1);
}

.home__social-link:hover {
  transform: translateY(-5px);
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-lg);
}

.home__social-link .tooltip {
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-color);
  color: var(--text-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  border: 1px solid rgba(var(--text-color), 0.1);
}

.home__social-link:hover .tooltip {
  opacity: 1;
  visibility: visible;
  top: -45px;
}

/* Home Image */
.home__image {
  position: relative;
}

.image-wrapper {
  position: relative;
  width: 400px;
  height: 400px;
  margin: 0 auto;
}

.home__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--border-radius-xl);
  border: 8px solid var(--surface-color);
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-xl);
}

.floating-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.shape {
  position: absolute;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  animation: float 6s ease-in-out infinite;
}

.shape-1 {
  width: 80px;
  height: 80px;
  top: -20px;
  right: -20px;
  animation-delay: 0s;
}

.shape-2 {
  width: 60px;
  height: 60px;
  bottom: 40px;
  left: -30px;
  animation-delay: 2s;
}

.shape-3 {
  width: 40px;
  height: 40px;
  bottom: -10px;
  right: 60px;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.status-indicator {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-color);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  box-shadow: var(--shadow-md);
  z-index: 3;
  border: 1px solid rgba(var(--text-color), 0.1);
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--success-color);
  border-radius: var(--border-radius-full);
  animation: pulse 2s ease-in-out infinite;
}

.status-text {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-color);
}

/* Home Scroll */
.home__scroll {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  text-decoration: none;
  color: var(--text-secondary);
  animation: bounce 2s infinite;
}

.mouse {
  width: 30px;
  height: 50px;
  border: 2px solid var(--text-secondary);
  border-radius: var(--border-radius-full);
  display: flex;
  justify-content: center;
  padding-top: 10px;
}

.wheel {
  width: 4px;
  height: 10px;
  background: var(--primary-color);
  border-radius: var(--border-radius-full);
  animation: scroll 2s infinite;
}

.home__scroll-text {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.home__scroll-arrow {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
}

@keyframes scroll {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(15px);
    opacity: 0;
  }
}

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

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

.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.about__image {
  position: relative;
}

.image-container {
  position: relative;
  width: 400px;
  margin: 0 auto;
}

.about__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-xl);
  border: 8px solid var(--surface-color);
  box-shadow: var(--shadow-xl);
}

.about__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(var(--dark-bg), 0.3);
  border-radius: var(--border-radius-xl);
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: var(--spacing-lg);
}

.experience-badge {
  background: var(--surface-color);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(var(--text-color), 0.1);
}

.experience-years {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.experience-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.about__info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--surface-color);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: transform var(--transition-normal);
}

.info-item:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.info-item i {
  font-size: var(--font-size-xl);
  color: var(--primary-color);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--primary-color), 0.1);
  border-radius: var(--border-radius-full);
}

.info-item h3 {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.info-item p {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-color);
}

.about__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.about__description b {
  color: var(--text-color);
  font-weight: 600;
}

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

.about__technologies h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

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

.tech-tag {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--surface-color);
  color: var(--text-color);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: all var(--transition-normal);
}

.tech-tag:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

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

.skills__container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.skills__category {
  background: var(--card-color);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: transform var(--transition-normal);
}

.skills__category:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.skills__category-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  color: var(--text-color);
}

.skills__category-title i {
  color: var(--primary-color);
  font-size: var(--font-size-2xl);
}

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

.skill-item {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

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

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.skill-name {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-color);
}

.skill-percentage {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--primary-color);
  background: rgba(var(--primary-color), 0.1);
  padding: 2px 8px;
  border-radius: var(--border-radius-full);
}

.skill-bar {
  width: 100%;
  height: 10px;
  background: rgba(var(--text-color), 0.1);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  width: 0;
  transition: width 1.5s ease-out;
  position: relative;
}

.skill-progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.4), 
    transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

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

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

.service-card {
  background: var(--surface-color);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: rgba(var(--primary-color), 0.1);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-2xl);
  color: var(--primary-color);
  transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
  background: var(--primary-color);
  color: white;
  transform: rotate(15deg) scale(1.1);
}

.service-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.service-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.service-features {
  list-style: none;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.service-features li::before {
  content: '✓';
  color: var(--primary-color);
  font-weight: bold;
}

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

.projects__filter {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--card-color);
  border: 1px solid rgba(var(--text-color), 0.1);
  border-radius: var(--border-radius-full);
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.projects__container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.project-card {
  background: var(--card-color);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
}

.project-card.animate {
  animation: fadeInUp 0.6s ease forwards;
}

.project-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.project-image {
  position: relative;
  height: 250px;
  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(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(var(--dark-bg), 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

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

.project-tech span {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--primary-color);
  color: white;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

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

.project-category {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--primary-color);
  background: rgba(var(--primary-color), 0.1);
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--spacing-sm);
}

.project-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

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

.project-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
  background: rgba(var(--primary-color), 0.1);
  transition: all var(--transition-normal);
}

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

.project-link i {
  font-size: var(--font-size-lg);
}

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

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

.contact__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact__info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--surface-color);
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: transform var(--transition-normal);
}

.contact__info-item:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.contact__info-icon {
  width: 50px;
  height: 50px;
  background: rgba(var(--primary-color), 0.1);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: var(--primary-color);
}

.contact__info-content h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
  color: var(--text-color);
}

.contact__info-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.contact__info-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: gap var(--transition-normal);
}

.contact__info-link:hover {
  gap: var(--spacing-sm);
}

.availability-status {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 4px 12px;
  background: rgba(var(--success-color), 0.1);
  color: var(--success-color);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.contact__social h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

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

.contact__social-link {
  width: 50px;
  height: 50px;
  background: var(--surface-color);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  font-size: var(--font-size-xl);
  text-decoration: none;
  border: 1px solid rgba(var(--text-color), 0.1);
  transition: all var(--transition-normal);
}

.contact__social-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-5px);
}

/* Contact Form */
.contact__form-container {
  background: var(--surface-color);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(var(--text-color), 0.1);
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--card-color);
  border: 1px solid rgba(var(--text-color), 0.1);
  border-radius: var(--border-radius-md);
  color: var(--text-color);
  font-size: var(--font-size-md);
  font-family: var(--font-primary);
  transition: all var(--transition-normal);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-group label {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-lg);
  color: var(--text-secondary);
  pointer-events: none;
  transition: all var(--transition-normal);
}

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

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -10px;
  left: var(--spacing-sm);
  font-size: var(--font-size-xs);
  background: var(--surface-color);
  padding: 0 var(--spacing-xs);
  color: var(--primary-color);
}

.submit-btn {
  width: 100%;
  position: relative;
  overflow: hidden;
}

.submit-btn .btn-text {
  position: relative;
  z-index: 2;
}

.submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.submit-btn:hover::before {
  left: 100%;
}

.form-message {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  text-align: center;
  font-weight: 500;
}

.form-message.success {
  background: rgba(var(--success-color), 0.1);
  color: var(--success-color);
  border: 1px solid var(--success-color);
}

.form-message.error {
  background: rgba(var(--danger-color), 0.1);
  color: var(--danger-color);
  border: 1px solid var(--danger-color);
}

/* =============== FOOTER =============== */
.footer {
  background: var(--surface-color);
  padding: var(--spacing-xxl) 0 var(--spacing-xl);
  border-top: 1px solid rgba(var(--text-color), 0.1);
}

.footer__content {
  display: grid;
  grid-template-columns: 2fr 3fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer__logo-link {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  text-decoration: none;
  color: var(--text-color);
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.footer__tagline {
  color: var(--text-secondary);
  max-width: 300px;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.footer__links-group h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--text-color);
}

.footer__links-group ul {
  list-style: none;
}

.footer__links-group li {
  margin-bottom: var(--spacing-sm);
}

.footer__links-group a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.footer__links-group a:hover {
  color: var(--primary-color);
  padding-left: var(--spacing-xs);
}

.footer__newsletter h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
}

.footer__newsletter p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-xs);
}

.newsletter-form input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--card-color);
  border: 1px solid rgba(var(--text-color), 0.1);
  border-radius: var(--border-radius-md);
  color: var(--text-color);
  font-size: var(--font-size-sm);
}

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

.newsletter-form button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.newsletter-form button:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(var(--text-color), 0.1);
}

.footer__copyright {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

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

.footer__legal a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-normal);
}

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

/* =============== SCROLL TO TOP =============== */
.scroll-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--primary-dark);
  transform: translateY(-5px);
}

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

/* Large Devices (1200px and up) */
@media screen and (min-width: 1200px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
}

/* Medium Devices (992px - 1199px) */
@media screen and (max-width: 1199px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }
  
  .home__container,
  .about__content {
    gap: var(--spacing-xl);
  }
  
  .skills__container {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .image-wrapper,
  .image-container {
    width: 350px;
    height: 350px;
  }
}

/* Tablet Devices (768px - 991px) */
@media screen and (max-width: 991px) {
  :root {
    --header-height: 70px;
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }
  
  .home__container,
  .about__content,
  .contact__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .home__content,
  .about__data {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
  }
  
  .home__buttons,
  .home__social,
  .about__info {
    justify-content: center;
  }
  
  .about__info {
    grid-template-columns: repeat(2, 1fr);
    max-width: 500px;
  }
  
  .skills__container {
    grid-template-columns: 1fr;
  }
  
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer__links {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--surface-color);
    flex-direction: column;
    padding: var(--spacing-xl);
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-xl);
    z-index: 1001;
  }
  
  .nav__menu.active {
    right: 0;
  }
  
  .nav__list {
    flex-direction: column;
    width: 100%;
  }
  
  .nav__theme {
    margin-left: 0;
    margin-top: var(--spacing-xl);
  }
  
  .theme-toggle .theme-text {
    display: none;
  }
  
  .theme-toggle-mobile {
    display: block;
  }
  
  .nav__toggle,
  .nav__close {
    display: block;
  }
  
  .nav__close {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
  }
}

/* Mobile Devices (576px - 767px) */
@media screen and (max-width: 767px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --spacing-xl: 1.5rem;
    --spacing-xxl: 2.5rem;
  }
  
  .section {
    padding: var(--spacing-xxl) 0;
  }
  
  .home__buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .button {
    width: 100%;
    max-width: 300px;
  }
  
  .about__info {
    grid-template-columns: 1fr;
  }
  
  .services__container {
    grid-template-columns: 1fr;
  }
  
  .projects__container {
    grid-template-columns: 1fr;
  }
  
  .image-wrapper,
  .image-container {
    width: 300px;
    height: 300px;
  }
  
  .footer__links {
    grid-template-columns: 1fr;
  }
  
  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

/* Small Mobile Devices (575px and below) */
@media screen and (max-width: 575px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.375rem;
    --font-size-3xl: 1.125rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .home__title {
    font-size: var(--font-size-4xl);
  }
  
  .home__education {
    font-size: var(--font-size-xl);
  }
  
  .image-wrapper,
  .image-container {
    width: 250px;
    height: 250px;
  }
  
  .nav__menu {
    width: 100%;
  }
  
  .project-links {
    flex-direction: column;
  }
  
  .scroll-top {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }
}

/* Dark mode transitions */
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --bg-color: var(--dark-bg);
    --surface-color: var(--dark-surface);
    --card-color: var(--dark-card);
    --text-color: var(--dark-text);
    --text-secondary: var(--dark-text-secondary);
    --shadow-color: rgba(0, 0, 0, 0.3);
  }
}

@media (prefers-color-scheme: light) {
  [data-theme="auto"] {
    --bg-color: var(--light-bg);
    --surface-color: var(--light-surface);
    --card-color: var(--light-card);
    --text-color: var(--light-text);
    --text-secondary: var(--light-text-secondary);
    --shadow-color: rgba(0, 0, 0, 0.1);
  }
}

/* Print Styles */
@media print {
  .preloader,
  .particles-container,
  .scroll-top,
  .home__scroll,
  .theme-toggle,
  .nav__toggle,
  .nav__close {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .header {
    position: static;
    background: white !important;
    border-bottom: 1px solid #ddd;
  }
  
  .section {
    page-break-inside: avoid;
  }
}