:root {
  --bg-primary: #0D0D0F;
  --bg-secondary: #121217;
  --bg-tertiary: #18181D;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(13, 13, 15, 0.85);

  --text-primary: #FFFFFF;
  --text-secondary: #A0A0A8;
  --text-muted: #5A5A65;

  --accent-primary: #0F766E;
  --accent-secondary: #EA580C;
  --accent-tertiary: #0284C7;
  --accent-gold: #B45309;

  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(15, 118, 110, 0.35);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(15, 118, 110, 0.12);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Manrope', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-height: 72px;
  --container-max: 1200px;
  --radius: 12px;
  --radius-lg: 20px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}


[data-theme="light"] {
  --bg-primary: #F8F8FA;
  --bg-secondary: #EFEFF2;
  --bg-tertiary: #E8E8ED;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(248, 248, 250, 0.9);

  --text-primary: #1A1A2E;
  --text-secondary: #555566;
  --text-muted: #8888A0;

  --accent-primary: #0D9488;
  --accent-secondary: #C2410C;
  --accent-tertiary: #0369A1;
  --accent-gold: #92400E;

  --border-color: rgba(0, 0, 0, 0.06);
  --border-hover: rgba(13, 148, 136, 0.28);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(13, 148, 136, 0.1);
}


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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  width: 100%;
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) var(--bg-secondary);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  width: 100%;
  line-height: 1.7;
  overflow-x: clip;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: 3px; }

::selection { background: var(--accent-primary); color: #fff; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }


.abstract-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  animation: blob-float 20s ease-in-out infinite;
}

[data-theme="light"] .blob { opacity: 0.08; }

.blob-1 {
  width: 500px; height: 500px;
  background: var(--accent-primary);
  top: -10%; right: -5%;
  animation-delay: 0s;
}

.blob-2 {
  width: 400px; height: 400px;
  background: var(--accent-secondary);
  bottom: 10%; left: -8%;
  animation-delay: -7s;
}

.blob-3 {
  width: 350px; height: 350px;
  background: var(--accent-tertiary);
  top: 40%; left: 50%;
  animation-delay: -14s;
}

@keyframes blob-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}


.scroll-progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  z-index: 10000;
  transition: width 0.1s linear;
}


.navbar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-color);
  transition: box-shadow var(--transition-normal), background var(--transition-normal);
  padding-top: env(safe-area-inset-top, 0px);
}

.navbar.scrolled { box-shadow: var(--shadow-md); }

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: baseline;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover { opacity: 0.7; }
.logo-accent { color: var(--accent-primary); }
.logo-text { color: var(--text-primary); }
.logo-dot { color: var(--accent-secondary); font-weight: 800; }

.nav-menu { display: flex; list-style: none; gap: 4px; }

.nav-link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius);
  position: relative;
  transition: color var(--transition-fast);
  color: var(--text-secondary);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-fast);
  border-radius: 1px;
}

.nav-link:hover::after, .nav-link.active::after { width: 20px; }

.nav-actions { display: flex; align-items: center; gap: 8px; }

.nav-btn {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-btn:hover { color: var(--text-primary); border-color: var(--border-hover); }

.lang-btn {
  width: auto; padding: 0 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 1px;
}

.theme-btn .theme-icon { width: 18px; height: 18px; }
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

.mobile-btn { display: none; flex-direction: column; gap: 5px; }

.hamburger-line {
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-btn.active .hamburger-line:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-btn.active .hamburger-line:nth-child(2) { opacity: 0; }
.mobile-btn.active .hamburger-line:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }


.hero-section {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  padding: calc(var(--nav-height) + 40px) 24px 60px;
  position: relative; z-index: 1;
}

.hero-container {
  max-width: var(--container-max);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { z-index: 2; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 18px;
  padding: 7px 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 100px;
}

[data-theme="light"] .hero-tag {
  background: rgba(0, 0, 0, 0.02);
}

.tag-dot {
  width: 6px; height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0.9;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.05;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 50%, var(--accent-secondary) 100%);
  background-size: 200% 200%;
  animation: gradient-shift 6s ease-in-out infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  max-width: 480px;
  line-height: 1.8;
}

.hero-note {
  margin: 0 0 36px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  max-width: 500px;
}

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }


.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 28px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  border: none;
  box-shadow: 0 4px 15px rgba(15, 118, 110, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(15, 118, 110, 0.35);
}

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

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(15, 118, 110, 0.07);
  transform: translateY(-2px);
}


.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  --light-x: 50%;
  --light-y: 50%;
}


.profile-cursor-light {
  position: absolute;
  width: 350px; height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 118, 110, 0.14) 0%, rgba(15, 118, 110, 0.05) 40%, transparent 70%);
  left: var(--light-x);
  top: var(--light-y);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
  transition: left 0.3s ease-out, top 0.3s ease-out;
  will-change: left, top;
}

[data-theme="light"] .profile-cursor-light {
  background: radial-gradient(circle, rgba(13, 148, 136, 0.1) 0%, rgba(13, 148, 136, 0.04) 40%, transparent 70%);
}

.profile-photo-wrapper {
  position: relative;
  width: 320px; height: 320px;
  animation: float-gentle 6s ease-in-out infinite;
  will-change: transform;
}

@keyframes float-gentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.profile-photo-ring {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(var(--accent-primary), var(--accent-secondary), var(--accent-tertiary), var(--accent-gold), var(--accent-primary));
  animation: ring-spin 12s linear infinite;
  opacity: 0.35;
  z-index: 0;
  will-change: transform;
  filter: blur(1px);
}

@keyframes ring-spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.profile-photo {
  position: relative;
  width: 100%; height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-secondary);
  display: flex; align-items: center; justify-content: center;
  border: 4px solid var(--bg-primary);
  z-index: 1;
}

.profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-fallback {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%; height: 100%;
  position: absolute;
  top: 0; left: 0;
}

.profile-photo.fallback .profile-fallback { display: flex; }
.profile-photo:not(.fallback) .profile-fallback { display: none; }


.scroll-indicator {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 2px;
  z-index: 3;
  animation: scroll-bounce 2s ease-in-out infinite;
}

.scroll-mouse { width: 24px; height: 38px; border: 2px solid var(--text-muted); border-radius: 12px; position: relative; }

.scroll-wheel {
  width: 3px; height: 8px;
  background: var(--accent-primary);
  border-radius: 2px;
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 1.5s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes scroll-wheel {
  0% { transform: translateX(-50%) translateY(0); opacity: 1; }
  100% { transform: translateX(-50%) translateY(12px); opacity: 0; }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}


.section { padding: 100px 0; position: relative; z-index: 1; }

.section-header { text-align: center; margin-bottom: 60px; }

.skills-section .section-header,
.projects-section .section-header,
.contact-section .section-header {
  text-align: left;
  max-width: 760px;
  margin: 0 0 48px;
}

.skills-section .section-line,
.projects-section .section-line,
.contact-section .section-line {
  margin: 16px 0 0;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  letter-spacing: 2px;
  display: block;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.5px;
}

.section-line {
  width: 50px; height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  margin: 16px auto 0;
  border-radius: 2px;
}


.about-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.9fr); gap: 32px; align-items: start; }

.about-text-block {
  display: flex;
  flex-direction: column;
}


.about-photo-block {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.about-photo-feed {
  width: 320px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  position: relative;
  box-shadow: var(--shadow-md), 0 0 20px rgba(15, 118, 110, 0.08);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.about-photo-feed:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow), 0 0 30px rgba(15, 118, 110, 0.14);
}

.about-feed-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  touch-action: pan-y pinch-zoom;
}

.about-feed-slide {
  min-width: 100%;
  height: 100%;
  position: relative;
}

.about-feed-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-feed-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  opacity: 0;
  transition: opacity var(--transition-fast), background var(--transition-fast);
  backdrop-filter: blur(4px);
}

.about-photo-feed:hover .about-feed-btn { opacity: 1; }
.about-feed-btn:hover { background: rgba(0, 0, 0, 0.7); }
.about-feed-prev { left: 8px; }
.about-feed-next { right: 8px; }

.about-feed-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 3;
}

.about-feed-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transition: background var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.about-feed-dot.active {
  background: #fff;
  transform: scale(1.3);
}

.about-photo-fallback {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  background: var(--bg-secondary);
  z-index: 1;
}

.about-photo-feed.fallback .about-photo-fallback { display: flex; }
.about-photo-feed.fallback .about-feed-track { display: none; }
.about-photo-feed.fallback .about-feed-btn { display: none; }
.about-photo-feed.fallback .about-feed-dots { display: none; }

.about-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.about-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

.about-content p:last-child { margin-bottom: 0; }

.about-method-card {
  margin-top: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.about-method-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.about-method-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.about-method-list li {
  color: var(--text-secondary);
  line-height: 1.65;
  padding-left: 14px;
  border-left: 2px solid var(--border-color);
}

.about-socials { display: flex; gap: 12px; margin-top: 24px; }

.social-link {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
  color: var(--accent-primary);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}


.skills-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.skill-tab {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 28px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.skill-tab:hover { border-color: var(--border-hover); color: var(--text-primary); }

.skill-tab.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.skills-icon-grid {
  overflow: hidden;
  min-height: 72px;
  position: relative;
  padding: 8px 0;
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}

.skills-marquee-track {
  display: flex;
  gap: 28px;
  align-items: center;
  width: max-content;
  animation: skills-scroll 30s linear infinite;
  will-change: transform;
}

.skills-icon-grid:hover .skills-marquee-track {
  animation-play-state: paused;
}

@keyframes skills-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.skill-icon-item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  transition: transform var(--transition-normal), filter var(--transition-normal);
}

.skill-icon-item:hover {
  transform: translateY(-4px) scale(1.1);
  filter: drop-shadow(0 4px 12px rgba(15, 118, 110, 0.3));
}

.skill-icon-item img,
.skill-icon-item svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.skill-icon-item span {
  display: none;
}


.experience-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--accent-primary) 10%, var(--accent-primary) 90%, transparent);
  transform: translateX(-50%);
  opacity: 0.25;
}

.timeline-line::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, var(--accent-primary), transparent);
  filter: blur(4px);
  opacity: 0.5;
}

.timeline-item {
  position: relative;
  display: flex;
  width: 50%;
  padding: 0 40px 48px;
}

.timeline-item[data-side="left"] {
  align-self: flex-start;
  justify-content: flex-end;
  padding-right: 40px;
  padding-left: 0;
  margin-left: 0;
}

.timeline-item[data-side="right"] {
  align-self: flex-end;
  justify-content: flex-start;
  padding-left: 40px;
  padding-right: 0;
  margin-left: 50%;
}

.timeline-dot {
  position: absolute;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-primary);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-item[data-side="left"] .timeline-dot {
  right: -8px;
}

.timeline-item[data-side="right"] .timeline-dot {
  left: -8px;
}

.timeline-dot-inner {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  animation: pulse-soft 2.5s ease-in-out infinite;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 100%;
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal);
}

.timeline-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-primary);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.timeline-icon {
  color: var(--accent-secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.timeline-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .timeline-line {
    left: 20px;
  }

  .timeline-item,
  .timeline-item[data-side="left"],
  .timeline-item[data-side="right"] {
    width: 100%;
    margin-left: 0;
    padding-left: 52px;
    padding-right: 0;
    justify-content: flex-start;
  }

  .timeline-item[data-side="left"] .timeline-dot,
  .timeline-item[data-side="right"] .timeline-dot {
    left: 12px;
    right: auto;
  }
}



.projects-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.project-tab {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 28px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.project-tab:hover { border-color: var(--border-hover); color: var(--text-primary); }

.project-tab.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.projects-note {
  max-width: 760px;
  margin: 0 auto 28px;
  text-align: center;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-normal), transform var(--transition-normal), box-shadow var(--transition-normal), opacity var(--transition-normal);
  animation-delay: var(--delay, 0s);
}

.project-card.filter-hidden {
  display: none;
}

.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}

.project-image {
  position: relative; height: 200px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}

.project-placeholder { color: var(--accent-primary); opacity: 0.2; transition: opacity var(--transition-normal), transform var(--transition-normal); }
.project-card:hover .project-placeholder { opacity: 0.4; transform: scale(1.1); }

.project-overlay {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity var(--transition-normal);
  font-size: 0.9rem; color: #fff; letter-spacing: 1px;
}

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

.project-info { padding: 24px; }

.project-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.project-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }

.project-tech { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }

.project-tech span {
  font-size: 0.72rem;
  padding: 4px 12px;
  border: 1px solid var(--border-color);
  border-radius: 100px;
  color: var(--text-secondary);
}

.project-links { display: flex; gap: 12px; flex-wrap: wrap; }

.project-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.8rem;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.project-btn:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.project-btn.demo-btn:hover { border-color: var(--accent-secondary); color: var(--accent-secondary); }


.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.testimonial-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }

.testimonial-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }

.testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  overflow: hidden;
  flex-shrink: 0;
}

.testimonial-avatar img { width: 100%; height: 100%; object-fit: cover; }

.testimonial-author { font-weight: 600; font-size: 0.9rem; }
.testimonial-role { font-size: 0.75rem; color: var(--text-muted); }
.testimonial-text { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; font-style: italic; }

.testimonial-submit-area {
  text-align: center;
  padding: 32px;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
}

.testimonial-submit-area p { color: var(--text-secondary); margin-bottom: 16px; }

.btn-google { gap: 8px; }

.testimonial-form-area {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.testimonial-form-area textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.testimonial-form-area textarea:focus { border-color: var(--accent-primary); }


.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }

.contact-info h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info p { color: var(--text-secondary); margin-bottom: 28px; line-height: 1.8; }

.contact-details { display: flex; flex-direction: column; gap: 16px; }

.contact-item {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-item svg { color: var(--accent-primary); flex-shrink: 0; }

.contact-form { display: flex; flex-direction: column; gap: 24px; }

.form-group { position: relative; }

.form-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  transition: color var(--transition-fast);
}

.form-group input, .form-group textarea {
  width: 100%; padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  resize: vertical;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.form-group:focus-within label { color: var(--accent-primary); }

.form-line {
  position: absolute; bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-normal);
  border-radius: 1px;
}

.form-group:focus-within .form-line { width: 100%; }

.btn-submit { align-self: flex-start; }
.form-status { font-size: 0.85rem; color: var(--accent-tertiary); min-height: 24px; }


.footer { padding: 40px 0; border-top: 1px solid var(--border-color); position: relative; z-index: 1; }

.footer-content { display: flex; flex-direction: column; align-items: center; gap: 16px; }

.footer-logo { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; }
.footer-text { font-size: 0.8rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 0.8rem; color: var(--text-secondary); transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--accent-primary); }

.ai-chat {
  position: fixed;
  inset: auto max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) auto;
  z-index: 1600;
  width: 56px;
  height: 56px;
}

.ai-chat-toggle {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35), 0 0 18px rgba(15, 118, 110, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.ai-chat-toggle:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.42), 0 0 22px rgba(15, 118, 110, 0.45);
}

.ai-chat-panel {
  position: absolute;
  right: 0;
  bottom: 70px;
  width: min(360px, calc(100vw - 32px));
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.ai-chat.collapsed .ai-chat-panel {
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  pointer-events: none;
  visibility: hidden;
}

.ai-chat:not(.collapsed) .ai-chat-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  visibility: visible;
}

.ai-chat-header {
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.16), rgba(15, 118, 110, 0));
}

.ai-chat-header h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.ai-chat-header p {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.ai-chat-messages {
  max-height: 280px;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ai-message {
  display: flex;
}

.ai-message.user {
  justify-content: flex-end;
}

.ai-msg-content {
  max-width: 86%;
  font-size: 0.84rem;
  line-height: 1.5;
  padding: 10px 12px;
  border-radius: 12px;
}

.ai-message.bot .ai-msg-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.ai-message.user .ai-msg-content {
  background: var(--accent-primary);
  color: #fff;
}

.ai-suggestions {
  padding: 0 12px 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ai-suggestion {
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: var(--bg-card);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.74rem;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.ai-suggestion:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.ai-chat-input-row {
  display: grid;
  grid-template-columns: 1fr 44px;
  gap: 8px;
  padding: 10px 12px 12px;
  border-top: 1px solid var(--border-color);
}

#ai-chat-input {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.84rem;
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
}

#ai-chat-input:focus {
  border-color: var(--accent-primary);
}

#ai-chat-send {
  border-radius: 10px;
  border: 1px solid var(--border-color);
  color: #fff;
  background: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

#ai-chat-send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: ai-typing 1s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes ai-typing {
  0%,
  80%,
  100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  40% {
    transform: translateY(-3px);
    opacity: 1;
  }
}


.reveal-up, .reveal-left, .reveal-right {
  opacity: 0;
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--delay, 0s);
  will-change: opacity, transform;
}

.reveal-up { transform: translateY(40px) scale(0.98); }
.reveal-left { transform: translateX(-40px) scale(0.98); }
.reveal-right { transform: translateX(40px) scale(0.98); }

.reveal-up.revealed, .reveal-left.revealed, .reveal-right.revealed {
  opacity: 1; transform: translate(0) scale(1);
}

.section-header {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-header.revealed {
  opacity: 1;
  transform: translateY(0);
}


@media (max-width: 1024px) {
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-content { display: flex; flex-direction: column; align-items: center; }
  .hero-description { max-width: 100%; }
  .hero-note { max-width: 100%; }
  .hero-buttons { justify-content: center; }
  .hero-visual { min-height: auto; max-width: 320px; margin: 0 auto; }
  .profile-photo-wrapper { width: 260px; height: 260px; }
  .profile-cursor-light { width: 280px; height: 280px; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-height); left: 0;
    width: 100%;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px; gap: 4px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-120%);
    visibility: hidden;
    opacity: 0;
    transition: transform var(--transition-normal), visibility var(--transition-normal), opacity var(--transition-normal);
    z-index: 999;
    padding-top: calc(16px + env(safe-area-inset-top, 0px));
  }

  .nav-menu.active { transform: translateY(0); visibility: visible; opacity: 1; }
  .mobile-btn { display: flex; }
  .projects-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .scroll-indicator { display: none; }

  .hero-container { gap: 24px; }
  .hero-visual { order: -1; margin-bottom: 8px; }
  .project-tab { padding: 8px 20px; font-size: 0.82rem; }
  .profile-photo-wrapper { width: 220px; height: 220px; }
  .profile-cursor-light {
    width: 240px; height: 240px;
    left: 50% !important; top: 50% !important;
    transition: none;
  }

  .timeline-card { padding: 18px; }
  .timeline-title { font-size: 0.95rem; }
  .timeline-desc { font-size: 0.82rem; }

  .skills-section .section-header,
  .projects-section .section-header,
  .contact-section .section-header {
    text-align: center;
    margin-bottom: 40px;
  }

  .skills-section .section-line,
  .projects-section .section-line,
  .contact-section .section-line {
    margin: 16px auto 0;
  }

  .section { padding: 60px 0; }
  .skill-icon-item { width: 44px; height: 44px; }
  .skills-marquee-track { gap: 12px; }

  .ai-chat {
    inset: auto max(10px, env(safe-area-inset-right, 0px)) max(10px, env(safe-area-inset-bottom, 0px)) auto;
    width: 52px;
    height: 52px;
  }

  .ai-chat-toggle {
    width: 52px;
    height: 52px;
  }

  .ai-chat-panel {
    width: min(360px, calc(100vw - 24px));
    bottom: 64px;
  }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2.2rem; }
  .hero-buttons { flex-direction: column; width: 100%; }
  .hero-note { font-size: 0.86rem; margin-bottom: 28px; }
  .projects-tabs { gap: 6px; }
  .btn { justify-content: center; }
  .about-stats { grid-template-columns: 1fr; }
  .profile-photo-wrapper { width: 180px; height: 180px; }
  .profile-cursor-light { width: 200px; height: 200px; }
  .hero-visual { min-height: auto; }
  .section-header { margin-bottom: 40px; }
  .skills-tabs { gap: 6px; }
  .skill-tab { padding: 8px 20px; font-size: 0.82rem; }
  .skill-icon-item { width: 38px; height: 38px; }
  .skills-marquee-track { gap: 16px; }
}