/* ============================================
   MODERN PORTFOLIO CSS WITH DAY/NIGHT MODE
   Mobile-First Design with Advanced Features
   ============================================ */

:root {
  /* Dark Theme (Default) */
  --primary: #181c2f;
  --secondary: #ffb86b;
  --accent: #00e6d0;
  --background: #0f1419;
  --surface: #1a1f2e;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);
  --text-main: #f4f4f4;
  --text-muted: rgba(244, 244, 244, 0.7);
  --text-light: rgba(244, 244, 244, 0.5);
  --shadow-color: rgba(0, 230, 208, 0.15);
  --shadow-hover: rgba(0, 230, 208, 0.25);
  --card-bg: rgba(26, 31, 46, 0.8);
  --border-color: rgba(255, 255, 255, 0.1);

  /* Light Theme Variables */
  --light-primary: #ffffff;
  --light-secondary: #ff8c42;
  --light-accent: #00a896;
  --light-background: #f8fafc;
  --light-surface: #ffffff;
  --light-glass-bg: rgba(255, 255, 255, 0.9);
  --light-glass-border: rgba(0, 0, 0, 0.1);
  --light-text-main: #1a202c;
  --light-text-muted: rgba(26, 32, 44, 0.7);
  --light-text-light: rgba(26, 32, 44, 0.5);
  --light-shadow-color: rgba(0, 168, 150, 0.15);
  --light-shadow-hover: rgba(0, 168, 150, 0.25);
  --light-card-bg: rgba(255, 255, 255, 0.9);
  --light-border-color: rgba(0, 0, 0, 0.1);

  /* Spacing */
  --container-padding: clamp(1rem, 5vw, 3rem);
  --section-spacing: clamp(4rem, 8vw, 8rem);
  --element-gap: clamp(1rem, 3vw, 2rem);

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-xs: clamp(0.75rem, 2vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 2.5vw, 1rem);
  --font-size-base: clamp(1rem, 3vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 4vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 5vw, 2rem);
  --font-size-3xl: clamp(2rem, 6vw, 3rem);
  --font-size-4xl: clamp(2.5rem, 7vw, 4rem);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-bounce: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Light Theme */
[data-theme="light"] {
  --primary: var(--light-primary);
  --secondary: var(--light-secondary);
  --accent: var(--light-accent);
  --background: var(--light-background);
  --surface: var(--light-surface);
  --glass-bg: var(--light-glass-bg);
  --glass-border: var(--light-glass-border);
  --text-main: var(--light-text-main);
  --text-muted: var(--light-text-muted);
  --text-light: var(--light-text-light);
  --shadow-color: var(--light-shadow-color);
  --shadow-hover: var(--light-shadow-hover);
  --card-bg: var(--light-card-bg);
  --border-color: var(--light-border-color);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--background);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ============================================
   THEME TOGGLE
   ============================================ */

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

.theme-btn {
  width: 60px;
  height: 30px;
  border-radius: 15px;
  border: none;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  padding: 0 5px;
}

.theme-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px var(--shadow-color);
}

.theme-icon {
  position: absolute;
  font-size: 16px;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}

.theme-icon.sun {
  left: 5px;
  opacity: 0;
  transform: translateX(-10px);
}

.theme-icon.moon {
  right: 5px;
  opacity: 1;
  transform: translateX(0);
}

[data-theme="light"] .theme-icon.sun {
  opacity: 1;
  transform: translateX(0);
}

[data-theme="light"] .theme-icon.moon {
  opacity: 0;
  transform: translateX(10px);
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-color);
  z-index: 999;
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

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

.nav-link:hover {
  color: var(--accent);
}

.hamburger {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--text-main);
  transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   LOADING SCREEN
   ============================================ */

.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--background);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--glass-border);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* ============================================
   LAYOUT & CONTAINERS
   ============================================ */

main {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 0 50px;
  position: relative;
  background: linear-gradient(135deg, var(--background) 0%, var(--surface) 100%);
}

.hero-container {
  width: 100%;
  padding: 0 var(--container-padding);
}

.hero-content {
  display: grid;
  gap: 3rem;
  align-items: center;
  min-height: 70vh;
}

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

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin: 0 0 1rem 0;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-animated-text {
  font-size: var(--font-size-xl);
  color: var(--secondary);
  margin-bottom: 1.5rem;
  font-weight: 600;
  min-height: 2em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}

.cursor {
  animation: blink 1s infinite;
  color: var(--accent);
}

@keyframes blink {

  0%,
  50% {
    opacity: 1;
  }

  51%,
  100% {
    opacity: 0;
  }
}

.hero-summary {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  min-width: 150px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  color: var(--background);
  box-shadow: 0 4px 15px var(--shadow-color);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--shadow-hover);
}

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

.btn-secondary:hover {
  background: var(--accent);
  color: var(--background);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

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

.stat-number {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.hero-photo-container {
  position: relative;
  width: 250px;
  height: 250px;
}

.hero-photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  box-shadow: 0 10px 30px var(--shadow-color);
  transition: all var(--transition-normal);
}

.hero-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px var(--shadow-hover);
}

.photo-bg-effect {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  opacity: 0.1;
  z-index: -1;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
    opacity: 0.1;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.2;
  }
}

.hero-3d-container {
  width: 100%;
  max-width: 400px;
  height: 300px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  backdrop-filter: blur(15px);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.loading-model {
  color: var(--text-muted);
  font-size: var(--font-size-base);
}

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 30px;
  height: 30px;
  border: 2px solid var(--accent);
  border-top: none;
  border-right: none;
  transform: rotate(-45deg);
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  40% {
    transform: translateX(-50%) translateY(-10px);
  }

  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */

.content-section {
  padding: var(--section-spacing) 0;
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease;
}

.content-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, var(--text-main), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(to right, var(--accent), var(--secondary));
  border-radius: 2px;
}

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

.about-content {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.about-intro {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 2rem;
  text-align: center;
}

.about-details {
  display: grid;
  gap: 2rem;
}

.detail-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.detail-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.detail-item h4 {
  font-size: var(--font-size-lg);
  margin: 0 0 0.5rem 0;
  color: var(--text-main);
}

.detail-item p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.about-image {
  text-align: center;
}

.about-image img {
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* ============================================
   SERVICES SECTION
   ============================================ */

.services-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 230, 208, 0.05), transparent);
  transition: left 0.6s ease;
}

.service-card:hover::before {
  left: 100%;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-hover);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.service-card h3 {
  font-size: var(--font-size-xl);
  margin: 0 0 1rem 0;
  color: var(--accent);
}

.service-card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.service-features {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-features li {
  padding: 0.25rem 0;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.service-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: bold;
  margin-right: 0.5rem;
}

/* ============================================
   PROJECTS SECTION - MODERN DESIGN
   ============================================ */

.projects-filter {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  border-radius: 25px;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: 500;
}

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

.projects-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.project-card.modern {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  backdrop-filter: blur(15px);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(30px);
}

.project-card.modern.visible {
  opacity: 1;
  transform: translateY(0);
}

.project-card.modern:hover {
  transform: translateY(-15px);
  box-shadow: 0 25px 50px var(--shadow-hover);
}

.project-image {
  position: relative;
  height: 250px;
  overflow: hidden;
}

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

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 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: 1rem;
}

.project-link {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--background);
  text-decoration: none;
  font-size: 1.2rem;
  transition: all var(--transition-normal);
}

.project-link:hover {
  transform: scale(1.1);
  background: var(--secondary);
}

.project-content {
  padding: 2rem;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.project-content h3 {
  font-size: var(--font-size-xl);
  margin: 0;
  color: var(--text-main);
}

.project-status {
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.project-status:contains("Completed") {
  background: rgba(0, 230, 208, 0.2);
  color: var(--accent);
}

.project-status:contains("In Progress") {
  background: rgba(255, 184, 107, 0.2);
  color: var(--secondary);
}

.project-content p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  background: rgba(0, 230, 208, 0.1);
  color: var(--accent);
  padding: 0.4rem 0.8rem;
  border-radius: 15px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  border: 1px solid rgba(0, 230, 208, 0.2);
  transition: all var(--transition-fast);
}

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

.project-metrics {
  display: flex;
  gap: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.metric {
  text-align: center;
}

.metric-value {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--accent);
}

.metric-label {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

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

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

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 80px;
}

.timeline-marker {
  position: absolute;
  left: 20px;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  border: 4px solid var(--background);
  box-shadow: 0 0 0 4px var(--accent);
}

.timeline-content {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  transform: translateX(10px);
  box-shadow: 0 10px 30px var(--shadow-color);
}

.timeline-content h3 {
  font-size: var(--font-size-xl);
  margin: 0 0 0.5rem 0;
  color: var(--accent);
}

.timeline-content h4 {
  font-size: var(--font-size-lg);
  margin: 0 0 0.5rem 0;
  color: var(--text-main);
}

.timeline-date {
  display: inline-block;
  background: var(--accent);
  color: var(--background);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 1rem;
}

.timeline-content p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.achievement-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.achievement-list li {
  padding: 0.5rem 0;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.5rem;
}

.achievement-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* ============================================
   SKILLS SECTION - ENHANCED
   ============================================ */

.skills-container {
  display: grid;
  gap: 3rem;
}

.skills-category {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(10px);
}

.skills-category h3 {
  font-size: var(--font-size-xl);
  color: var(--accent);
  margin: 0 0 2rem 0;
  text-align: center;
  font-weight: 600;
}

.skills-grid {
  display: grid;
  gap: 1.5rem;
}

.skill-item {
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

.skill-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px var(--shadow-color);
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

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

.skill-level {
  font-size: var(--font-size-sm);
  color: var(--accent);
  font-weight: 600;
}

.skill-bar {
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
  border-radius: 3px;
  transition: width 1s ease-in-out;
  animation: skillLoad 1.5s ease-in-out;
}

@keyframes skillLoad {
  from {
    width: 0;
  }
}

/* ============================================
   TESTIMONIALS SECTION
   ============================================ */

.testimonials-slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto 2rem;
  overflow: hidden;
  border-radius: 20px;
}

.testimonial-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3rem 2rem;
  backdrop-filter: blur(15px);
  opacity: 0;
  transform: translateX(100px);
  transition: all 0.5s ease;
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
}

.testimonial-card.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
}

.testimonial-content {
  text-align: center;
}

.stars {
  font-size: var(--font-size-lg);
  margin-bottom: 1.5rem;
}

.testimonial-content p {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.author-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--accent);
}

.author-info h4 {
  margin: 0;
  color: var(--text-main);
  font-weight: 600;
}

.author-info span {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.testimonial-nav {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  background: var(--border-color);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.nav-dot.active,
.nav-dot:hover {
  background: var(--accent);
  transform: scale(1.2);
}

/* ============================================
   CONTACT SECTION - ENHANCED
   ============================================ */

.contact-container {
  display: grid;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(15px);
}

.contact-header h3 {
  font-size: var(--font-size-2xl);
  color: var(--accent);
  margin: 0 0 1rem 0;
}

.contact-header p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.contact-methods {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all var(--transition-normal);
}

.contact-item:hover {
  transform: translateX(5px);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.contact-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-details h4 {
  margin: 0 0 0.25rem 0;
  color: var(--text-main);
  font-weight: 600;
}

.contact-details a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.social-link {
  width: 50px;
  height: 50px;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.5rem;
  transition: all var(--transition-normal);
}

.social-link:hover {
  background: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px var(--shadow-hover);
}

.contact-form-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(15px);
}

.contact-form {
  display: grid;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1.25rem 0 0.75rem 0;
  border: none;
  border-bottom: 2px solid var(--border-color);
  background: transparent;
  color: var(--text-main);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: all var(--transition-normal);
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--accent);
}

.form-group label {
  position: absolute;
  top: 1rem;
  left: 0;
  color: var(--text-muted);
  font-size: var(--font-size-base);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.form-group input:focus+label,
.form-group input:not(:placeholder-shown)+label,
.form-group textarea:focus+label,
.form-group textarea:not(:placeholder-shown)+label {
  top: 0;
  font-size: var(--font-size-sm);
  color: var(--accent);
}

.submit-btn {
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  color: var(--background);
  border: none;
  padding: 1.25rem 2rem;
  border-radius: 50px;
  font-size: var(--font-size-lg);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1rem;
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px var(--shadow-hover);
}

.btn-loader {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid var(--background);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
  margin-left: 0.5rem;
}

.submit-btn.loading .btn-loader {
  display: block;
}

.form-message {
  padding: 1rem;
  border-radius: 12px;
  text-align: center;
  font-weight: 500;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  margin-top: 1rem;
}

.form-message.success {
  background: rgba(0, 230, 208, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 230, 208, 0.3);
  opacity: 1;
  transform: translateY(0);
}

.form-message.error {
  background: rgba(255, 99, 99, 0.1);
  color: #ff6363;
  border: 1px solid rgba(255, 99, 99, 0.3);
  opacity: 1;
  transform: translateY(0);
}

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

.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  gap: 2rem;
  padding: 3rem 0 2rem;
  text-align: center;
}

.footer-info h3 {
  font-size: var(--font-size-xl);
  color: var(--accent);
  margin: 0 0 0.5rem 0;
}

.footer-info p {
  color: var(--text-muted);
  margin: 0;
}

.footer-links h4,
.footer-contact h4 {
  color: var(--text-main);
  margin: 0 0 1rem 0;
  font-weight: 600;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-contact p {
  margin: 0.25rem 0;
  color: var(--text-muted);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 0;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

/* ============================================
   ANIMATIONS
   ============================================ */

.animated-card {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.animated-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.animated-section {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease;
}

.animated-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Small tablets and large phones */
@media (min-width: 480px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }

  .services-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

/* Tablets */
@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }

  .hamburger {
    display: none;
  }

  .hero-content {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    text-align: left;
  }

  .hero-text {
    text-align: left;
  }

  .hero-buttons {
    justify-content: flex-start;
  }

  .hero-stats {
    justify-content: flex-start;
  }

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

  .about-details {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-content {
    grid-template-columns: repeat(3, 1fr);
    text-align: left;
  }

  .timeline-item {
    padding-left: 100px;
  }

  .experience-timeline::before {
    left: 40px;
  }

  .timeline-marker {
    left: 30px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .hero-3d-container {
    height: 400px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .about-details {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Large desktop */
@media (min-width: 1200px) {
  .hero-photo-container {
    width: 300px;
    height: 300px;
  }

  .hero-3d-container {
    height: 500px;
  }

  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   ACCESSIBILITY & UTILITIES
   ============================================ */

/* Focus states */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .scroll-arrow {
    animation: none;
  }

  .photo-bg-effect {
    animation: none;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --glass-bg: rgba(255, 255, 255, 0.2);
    --glass-border: rgba(255, 255, 255, 0.4);
    --border-color: rgba(255, 255, 255, 0.3);
  }

  [data-theme="light"] {
    --glass-bg: rgba(0, 0, 0, 0.1);
    --glass-border: rgba(0, 0, 0, 0.2);
    --border-color: rgba(0, 0, 0, 0.2);
  }
}

/* Print styles */
@media print {

  .theme-toggle,
  .navbar,
  .hero-3d-container,
  .loading-screen {
    display: none !important;
  }

  body {
    background: white !important;
    color: black !important;
  }

  .content-section {
    page-break-inside: avoid;
  }
}