:root {
  --bg: #0a0e16;
  --bg-elevated: #151921;
  --text: #f0f6ff;
  --text-muted: #9ba8c7;
  --text-dim: #6b7a99;
  --accent-cyan: #00e5ff;
  --accent-purple: #d946ef;
  --accent-blue: #3b82f6;
  --glow-cyan: rgba(0, 229, 255, 0.4);
  --glow-purple: rgba(217, 70, 239, 0.4);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px var(--glow-cyan), 0 0 30px var(--glow-purple);
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --text: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;
    --accent-cyan: #06b6d4;
    --accent-purple: #c026d3;
    --accent-blue: #2563eb;
    --glow-cyan: rgba(6, 182, 212, 0.3);
    --glow-purple: rgba(192, 38, 211, 0.3);
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.15);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg) url("../assets/bg/noise.webp") center/auto repeat;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse 1200px 800px at 20% 0%, var(--glow-purple), transparent 50%),
    radial-gradient(ellipse 1000px 700px at 80% 50%, var(--glow-cyan), transparent 50%),
    radial-gradient(ellipse 800px 600px at 50% 100%, var(--glow-blue), transparent 50%);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  animation: gradient-shift 20s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(5%, 3%) rotate(2deg); }
}

.skip {
  position: absolute;
  left: -9999px;
  z-index: 999;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--bg-elevated);
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

/* ========== NAVIGATION ========== */
.floating-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.5rem 0;
  transition: var(--transition);
}

.floating-nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 22, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.floating-nav.scrolled::before {
  opacity: 1;
}

.nav-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.nav-logo img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 2px solid var(--border);
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.nav-logo img:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 24px var(--glow-cyan);
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transition: width 0.3s ease;
}

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

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

/* ========== HERO SECTION ========== */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem clamp(1rem, 4vw, 3rem);
  position: relative;
  text-align: center;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  animation: fadeInUp 1s ease-out;
}

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

.hero-avatar-wrap {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto 2rem;
}

.avatar-glow {
  position: absolute;
  inset: -20px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.5;
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.1); }
}

.hero-avatar {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 4px solid var(--border);
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.hero-avatar:hover {
  transform: scale(1.05);
  border-color: var(--accent-cyan);
}

.hero-heading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.hero-sparkle {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--accent-cyan);
  animation: sparkle-rotate 3s linear infinite;
}

@keyframes sparkle-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  color: white;
  box-shadow: var(--shadow-md), 0 0 30px var(--glow-cyan);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 40px var(--glow-purple);
}

.btn-primary span {
  position: relative;
  z-index: 1;
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.05);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bounce 2s infinite;
  opacity: 0.6;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: block;
  padding: 0.5rem;
}

.scroll-indicator:hover {
  opacity: 1;
  color: var(--accent-cyan);
}

@keyframes bounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 10px); }
}

/* ========== SECTIONS ========== */
.section-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.02em;
}

.title-accent {
  color: var(--accent-cyan);
  font-size: 0.8em;
}

.section-subtitle {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin: 3rem 0 1.5rem;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.section-description {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 3rem;
}

/* ========== ABOUT SECTION ========== */
.about-section {
  padding: clamp(4rem, 10vw, 8rem) 0;
  position: relative;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tech-badge {
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}

.tech-badge:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.05);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ========== PROJECTS SECTION ========== */
.projects-section {
  padding: clamp(4rem, 10vw, 8rem) 0;
  position: relative;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.more-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  opacity: 0;
  animation: cardFadeIn 0.6s ease-out forwards;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 229, 255, 0.1);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(217, 70, 239, 0.1));
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--text);
  letter-spacing: -0.01em;
}

.card-description {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.shield-badge {
  height: 20px;
  border-radius: 4px;
  transition: var(--transition);
}

.shield-badge:hover {
  transform: translateY(-2px);
  filter: brightness(1.2);
}

.card-actions {
  display: flex;
  gap: 0.75rem;
  padding: 0 1.5rem 1.5rem;
}

.card-btn {
  flex: 1;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  text-align: center;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.card-btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: white;
  border: none;
}

.card-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--glow-cyan);
}

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

.card-btn-secondary:hover {
  background: var(--bg);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* ========== LINKS SECTION ========== */
.links-section {
  padding: clamp(4rem, 10vw, 8rem) 0;
  position: relative;
}

.socials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.social-link:hover::before {
  opacity: 0.05;
}

.social-link:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.social-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.social-link:hover .social-icon {
  filter: drop-shadow(0 0 8px var(--glow-cyan));
}

.social-label {
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== FOOTER ========== */
.site-footer {
  padding: 3rem clamp(1rem, 4vw, 3rem);
  text-align: center;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 2;
  background: var(--bg);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  color: var(--text-muted);
}

.footer-content p {
  margin: 0.5rem 0;
}

.footer-year {
  font-size: 0.9rem;
  opacity: 0.7;
}

/* ========== SPARKLES CANVAS ========== */
#sparkles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.6;
}

/* ========== LOADING STATES ========== */
html.is-loading body {
  opacity: 0;
}

html.is-loaded body {
  opacity: 1;
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .nav-links {
    gap: 1rem;
  }

  .nav-link {
    font-size: 0.85rem;
  }

  .hero-section {
    min-height: 90vh;
  }

  .hero-avatar-wrap {
    width: 140px;
    height: 140px;
  }

  .hero-avatar {
    width: 140px;
    height: 140px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

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

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

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

  .tech-stack {
    justify-content: center;
  }
}

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

  .nav-links {
    gap: 0.75rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .card-body {
    padding: 1rem;
  }

  .card-actions {
    padding: 0 1rem 1rem;
    flex-direction: column;
  }

  .card-btn {
    width: 100%;
  }
}

/* ========== SMOOTH SCROLL ========== */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}