/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-light: #64748b;
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.7);
  --bg-glass-hover: rgba(255, 255, 255, 0.9);
  --border-color: rgba(255, 255, 255, 0.3);
  --shadow-light: 0 10px 40px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 20px 60px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 25px 80px rgba(0, 0, 0, 0.15);
  --border-radius: 24px;
  --border-radius-small: 16px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-light: #94a3b8;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-glass: rgba(15, 23, 42, 0.8);
  --bg-glass-hover: rgba(15, 23, 42, 0.95);
  --border-color: rgba(255, 255, 255, 0.15);
  --shadow-light: 0 10px 40px rgba(0, 0, 0, 0.4);
  --shadow-medium: 0 20px 60px rgba(0, 0, 0, 0.6);
  --shadow-hover: 0 25px 80px rgba(0, 0, 0, 0.8);
}

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

html {
  scroll-behavior: smooth;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: auto;
  transition: var(--transition);
}

.nav-container {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.75rem 1.5rem;
  box-shadow: var(--shadow);
  width: fit-content;
  margin: 0 auto;
  position: relative;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-desktop::-webkit-scrollbar {
  display: none;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: 25px;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.8rem;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

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

.nav-item i {
  font-size: 0.9rem;
  width: 14px;
  text-align: center;
}

/* Nav Logo */
.nav-logo {
  font-weight: 700 !important;
  font-size: 1.1rem !important;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
  padding: 0.5rem 1rem !important;
}

.nav-logo:hover {
  transform: scale(1.05) !important;
  background: linear-gradient(135deg, var(--accent-color), var(--success-color)) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  background-clip: text !important;
}

.nav-mobile {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
}

.mobile-menu-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  background: var(--bg-glass);
}

.dark-mode-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.125rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition);
  margin-left: 1rem;
}

.dark-mode-toggle:hover {
  background: var(--bg-glass);
  transform: rotate(180deg);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 20px 20px;
  z-index: 100;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  opacity: 0;
  transform: translateX(-20px);
  animation: slideInFromLeft 0.3s ease forwards;
}

.mobile-nav-item:nth-child(1) { animation-delay: 0.1s; }
.mobile-nav-item:nth-child(2) { animation-delay: 0.15s; }
.mobile-nav-item:nth-child(3) { animation-delay: 0.2s; }
.mobile-nav-item:nth-child(4) { animation-delay: 0.25s; }
.mobile-nav-item:nth-child(5) { animation-delay: 0.3s; }
.mobile-nav-item:nth-child(6) { animation-delay: 0.35s; }
.mobile-nav-item:nth-child(7) { animation-delay: 0.4s; }
.mobile-nav-item:nth-child(8) { animation-delay: 0.45s; }
.mobile-nav-item:nth-child(9) { animation-delay: 0.5s; }

@keyframes slideInFromLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.mobile-nav-item i {
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

/* Desktop Navigation */
@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }

  .nav-mobile {
    display: none;
  }

  .mobile-menu {
    display: none !important;
  }

  .nav-container {
    width: fit-content;
    padding: 0.75rem 2rem;
  }
}

/* Mobile Navigation */
@media (max-width: 767px) {
  .navbar {
    width: calc(100% - 2rem);
  }

  .nav-container {
    width: 100%;
    padding: 0.75rem 1.5rem;
  }
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-background {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
  opacity: 0.1;
  filter: blur(100px);
}

.hero-background::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

.floating-element {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.3;
  animation: float 6s ease-in-out infinite;
}

.floating-1 {
  width: 300px;
  height: 300px;
  background: var(--primary-color);
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.floating-2 {
  width: 200px;
  height: 200px;
  background: var(--secondary-color);
  top: 60%;
  right: 10%;
  animation-delay: 2s;
}

.floating-3 {
  width: 250px;
  height: 250px;
  background: var(--accent-color);
  bottom: 20%;
  left: 50%;
  animation-delay: 4s;
}

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

.hero-content {
  text-align: center;
  z-index: 10;
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 300;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease-out 0.5s both;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 1s both;
}

.hero-btn {
  border: none;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.hero-btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

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

.hero-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.hero-btn-primary:hover {
  background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
}

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

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: calc(200px + 100%) 0;
  }
}

/* Loading animations for elements */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animations */
.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(2) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.4s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.5s; }
.animate-on-scroll:nth-child(6) { transition-delay: 0.6s; }

/* Sections */
.section {
  padding: 5rem 0;
  position: relative;
}

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

.section-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

/* Glass Card */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-hover);
}

[data-theme="dark"] .glass-card:hover {
  background: rgba(20, 20, 20, 0.6);
  border-color: rgba(255, 255, 255, 0.2);
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

/* Skills Section */
.skills-container {
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
}

.skill-category:hover {
  transform: translateY(-3px);
  background: var(--bg-glass-hover);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-hover);
}

.skill-category-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 1rem 0;
}

.skill-category-title i {
  width: 35px;
  height: 35px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  flex-shrink: 0;
}

.skills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.skill-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.skill-item::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 0.6s ease;
}

.skill-item:hover::before {
  left: 100%;
}

.skill-item:hover {
  transform: translateY(-5px) scale(1.1);
  background: var(--bg-glass-hover);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-medium);
}

.skill-item i {
  font-size: 1.25rem;
  color: var(--text-primary);
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.skill-item:hover i {
  color: var(--primary-color);
  transform: scale(1.1);
}

/* Learning Indicator Item */
.learning-indicator-item {
  position: relative;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
  border-color: var(--primary-color) !important;
}

.learning-indicator-item i {
  color: white !important;
  animation: pulse 2s infinite;
}

.learning-dots {
  position: absolute;
  bottom: 2px;
  right: 2px;
  display: flex;
  gap: 2px;
}

.learning-dots span {
  width: 4px;
  height: 4px;
  background: white;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

.learning-dots span:nth-child(2) {
  animation-delay: 0.3s;
}

.learning-dots span:nth-child(3) {
  animation-delay: 0.6s;
}

.learning-indicator-item:hover {
  transform: translateY(-5px) scale(1.15) !important;
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4) !important;
}

.about-text {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.about-text:hover {
  transform: translateY(-8px);
  background: var(--bg-glass-hover);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-hover);
}

[data-theme="dark"] .about-text:hover {
  background: rgba(20, 20, 20, 0.7);
  border-color: rgba(255, 255, 255, 0.3);
}

.about-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.about-visual:hover {
  transform: translateY(-8px);
  background: var(--bg-glass-hover);
  border-color: var(--secondary-color);
  box-shadow: var(--shadow-hover);
}

[data-theme="dark"] .about-visual:hover {
  background: rgba(20, 20, 20, 0.7);
  border-color: rgba(255, 255, 255, 0.3);
}

.about-image {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 2rem;
  border: 4px solid transparent;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  padding: 6px;
  transition: var(--transition);
  position: relative;
}

.about-image img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  transition: var(--transition);
}

.about-visual:hover .about-image {
  transform: scale(1.05) rotate(5deg);
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
}

.about-visual:hover .about-image img {
  filter: brightness(1.1);
}

.about-name {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

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

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  justify-content: flex-end;
  padding-right: 50%;
  position: relative;
  margin-bottom: 3rem;
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 50%;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 30px;
}

.timeline-content {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  flex: 1;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
  margin-right: 30px;
  max-width: 400px;
  position: relative;
  overflow: hidden;
}

.timeline-content:hover {
  transform: translateY(-8px) scale(1.02);
  background: var(--bg-glass-hover);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-hover);
}

[data-theme="dark"] .timeline-content:hover {
  background: rgba(20, 20, 20, 0.6);
  border-color: rgba(255, 255, 255, 0.2);
}

.timeline-marker {
  position: absolute;
  left: 50%;
  top: 20px;
  transform: translateX(-50%);
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  z-index: 2;
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
  border: 4px solid var(--bg-primary);
}

.timeline-item:hover .timeline-marker {
  transform: translateX(-50%) scale(1.1) rotate(10deg);
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
  box-shadow: var(--shadow-hover);
}

/* Mobile timeline */
@media (max-width: 768px) {
  .timeline::before {
    left: 30px;
  }

  .timeline-item {
    padding-right: 0;
    padding-left: 80px;
    justify-content: flex-start;
  }

  .timeline-item:nth-child(even) {
    padding-left: 80px;
    padding-right: 0;
  }

  .timeline-content {
    margin-right: 0;
    margin-left: 0;
    max-width: none;
  }

  .timeline-item:nth-child(even) .timeline-content {
    margin-left: 0;
  }

  .timeline-marker {
    left: 0;
    transform: translateX(0);
  }
}

/* Certificates */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.certificate-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  text-align: center;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.certificate-card:hover {
  transform: translateY(-10px) scale(1.03);
  box-shadow: var(--shadow-hover);
  border-color: var(--secondary-color);
}

.certificate-icon {
  width: 90px;
  height: 90px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2.25rem;
  transition: var(--transition);
  position: relative;
}

.certificate-card:hover .certificate-icon {
  transform: rotateY(360deg) scale(1.1);
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
}

.certificate-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.certificate-issuer {
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.certificate-date {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Activities Section */
.activities-timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.activities-timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
  transform: translateX(-50%);
}

.activity-item {
  display: flex;
  justify-content: flex-end;
  padding-right: 50%;
  position: relative;
  margin-bottom: 3rem;
}

.activity-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 50%;
}

.activity-item:nth-child(even) .activity-content {
  margin-left: 30px;
}

.activity-content {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  flex: 1;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
  margin-right: 30px;
  max-width: 400px;
}

.activity-content:hover {
  transform: translateY(-8px) scale(1.02);
  background: var(--bg-glass-hover);
  border-color: var(--accent-color);
  box-shadow: var(--shadow-hover);
}

.activity-marker {
  position: absolute;
  left: 50%;
  top: 20px;
  transform: translateX(-50%);
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  z-index: 2;
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
  border: 4px solid var(--bg-primary);
}

.activity-item:hover .activity-marker {
  transform: translateX(-50%) scale(1.1) rotate(10deg);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  box-shadow: var(--shadow-hover);
}

.activity-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.activity-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.activity-company {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.activity-description {
  color: var(--text-light);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  position: relative;
}

.project-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-color);
}

.project-image {
  height: 220px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.project-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-image::before {
  opacity: 1;
}

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

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.project-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-buttons {
  display: flex;
  gap: 1rem;
}

.project-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
}

.project-btn-outline {
  border: 1px solid var(--text-secondary);
  color: var(--text-secondary);
  background: transparent;
}

[data-theme="dark"] .project-btn-outline {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

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

/* Contact */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 3rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-subtitle {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.contact-item:hover .contact-icon {
  transform: scale(1.1) rotate(10deg);
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
}

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

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

.social-links {
  margin-top: 2rem;
}

.social-links h4 {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.social-buttons {
  display: flex;
  gap: 1rem;
}

.social-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--text-secondary);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
}

[data-theme="dark"] .social-btn {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.social-btn:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.contact-form {
  display: flex;
  flex-direction: column;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-light);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.contact-submit-btn {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.contact-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer p {
  color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
  
  .skill-category {
    padding: 1.25rem;
  }

  .skill-category-title {
    font-size: 1rem;
  }

  .skill-category-title i {
    width: 30px;
    height: 30px;
    font-size: 0.875rem;
  }

  .skill-item {
    width: 35px;
    height: 35px;
  }

  .skill-item i {
    font-size: 1rem;
  }

  .activities-timeline::before {
    left: 30px;
  }

  .activity-item {
    padding-left: 80px;
    padding-right: 0;
    justify-content: flex-start;
  }

  .activity-item:nth-child(even) {
    padding-left: 80px;
    padding-right: 0;
  }

  .activity-content {
    margin-right: 0;
    margin-left: 0;
    max-width: none;
  }

  .activity-marker {
    left: 0;
    transform: translateX(0);
  }
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-text {
    text-align: center;
    order: 2;
    padding: 2rem;
  }

  .about-visual {
    order: 1;
    padding: 2rem;
  }

  .about-image {
    width: 180px;
    height: 180px;
  }

  .skill-category {
    padding: 1rem;
    margin-bottom: 1.25rem;
  }

  .skill-category-title {
    font-size: 0.875rem;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }

  .skill-category-title i {
    width: 25px;
    height: 25px;
    font-size: 0.75rem;
  }

  .skills-row {
    gap: 0.5rem;
  }

  .skill-item {
    width: 30px;
    height: 30px;
  }

  .skill-item i {
    font-size: 0.875rem;
  }

  .learning-dots span {
    width: 3px;
    height: 3px;
  }

  .activities-timeline::before {
    left: 20px;
  }

  .activity-item {
    padding-left: 60px;
  }

  .activity-marker {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .activity-content {
    padding: 1.5rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .timeline::before {
    left: 30px;
  }

  .timeline-item {
    padding-left: 60px;
  }

  .timeline-marker {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }

  .timeline-content {
    padding: 1.5rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .certificates-grid {
    grid-template-columns: 1fr;
  }

  .project-buttons {
    flex-direction: column;
  }

  .social-buttons {
    flex-direction: column;
  }

  .section {
    padding: 3rem 0;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-btn {
    width: 100%;
    max-width: 250px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .section {
    padding: 3rem 0;
  }

  .glass-card {
    padding: 1.5rem;
  }

  .timeline-content {
    padding: 1rem;
  }

  .certificate-card {
    padding: 1.5rem;
  }

  .project-content {
    padding: 1rem;
  }

  .contact-content {
    padding: 1.5rem;
  }
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(45deg, #2563eb, #7c3aed);
}