:root {
  --bg: #f5f8fd;
  --bg-2: #ecf2fb;
  --bg-3: #e2eaf7;
  --primary: #0284c7;
  --primary-2: #7c3aed;
  --accent: #e11d6f;
  --success: #059669;
  --text: #1c2438;
  --text-dim: #5b6478;
  --glass: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(2, 132, 199, 0.18);
  --radius: 16px;
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Rajdhani', sans-serif;
  --shadow: 0 20px 60px rgba(30, 60, 120, 0.12);
  --glow-primary: 0 0 24px rgba(2, 132, 199, 0.18);
}

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

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  overflow-x: hidden;
  cursor: none;
}

@media (hover: none), (pointer: coarse) {
  body { cursor: auto; }
  .cursor, .cursor-dot { display: none !important; }
}

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

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--primary-2));
  border-radius: 10px;
}

/* ---------- 3D Background ---------- */
#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  display: block;
}

/* ---------- Loader ---------- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader-hex {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  animation: loaderPulse 1.2s ease-in-out infinite;
}
.loader-text {
  font-family: var(--font-display);
  letter-spacing: 4px;
  color: var(--text-dim);
}
.loader-text span { color: var(--primary); }
@keyframes loaderPulse {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 1; }
  50% { transform: scale(1.2) rotate(60deg); opacity: 0.6; }
}

/* ---------- Cursor ---------- */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 36px; height: 36px;
  border: 1.5px solid var(--primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  transition: width 0.25s, height 0.25s, border-color 0.25s, background 0.25s;
}
.cursor-dot {
  position: fixed;
  top: 0; left: 0;
  width: 6px; height: 6px;
  background: var(--primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
}
.cursor.hover {
  width: 60px; height: 60px;
  background: rgba(2, 132, 199, 0.12);
  border-color: var(--primary-2);
}

/* ---------- Progress bar ---------- */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--primary-2), var(--accent));
  z-index: 1000;
  box-shadow: var(--glow-primary);
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  transition: background 0.4s, padding 0.4s, backdrop-filter 0.4s;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  padding: 12px 40px;
  border-bottom: 1px solid var(--glass-border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-size: 24px;
  font-weight: 700;
  font-family: var(--font-display);
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #ffffff;
  border-radius: 10px;
  font-family: var(--font-body);
  font-weight: 700;
  box-shadow: var(--glow-primary);
}
.nav-links { display: flex; gap: 32px; }
.nav-link {
  position: relative;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: color 0.3s;
  padding: 4px 0;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  transition: width 0.3s;
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-cta { margin-left: 20px; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}
.hamburger span {
  width: 26px; height: 2px;
  background: var(--text);
  transition: 0.3s;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.5px;
  border: none;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}
.btn-small { padding: 9px 20px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }
.btn-glow {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.28);
}
.btn-glow:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(124, 58, 237, 0.32);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background: rgba(2, 132, 199, 0.08);
  transform: translateY(-3px);
  box-shadow: var(--glow-primary);
}

/* ---------- Sections ---------- */
.section { position: relative; padding: 50px 0; scroll-margin-top: 72px; }
.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.section-head { text-align: center; margin-bottom: 64px; }
.section-tag {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 5px;
  color: var(--primary);
  display: inline-block;
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 900;
  letter-spacing: 2px;
  line-height: 1.2;
}
.section-title span {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-sub {
  color: var(--text-dim);
  max-width: 560px;
  margin: 14px auto 0;
  font-size: 18px;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1), transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 0 120px;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(2, 132, 199, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 20%, transparent 70%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 20%, transparent 70%);
  z-index: -1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 22px;
  border-radius: 50px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}
.pulse-dot {
  width: 10px; height: 10px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.5); }
  70% { box-shadow: 0 0 0 12px rgba(5, 150, 105, 0); }
  100% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0); }
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 9vw, 110px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 4px;
  margin-bottom: 8px;
}
.title-line {
  display: block;
  background: linear-gradient(135deg, #16213e 20%, var(--primary) 55%, var(--primary-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.title-type {
  display: block;
  font-size: clamp(22px, 3.5vw, 42px);
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text);
  margin-top: 16px;
  min-height: 1.4em;
}
.title-type .cursor-blink {
  color: var(--primary);
  animation: blink 0.8s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-sub {
  color: var(--text);
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 500;
  max-width: 700px;
  margin: 0 auto 24px;
}
.hero-desc {
  display: block;
  color: var(--text-dim);
  font-size: 16px;
  margin-top: 10px;
}
.hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
  font-family: var(--font-display);
  font-size: 46px;
  font-weight: 900;
  color: var(--primary);
}
.stat-label {
  color: var(--text-dim);
  font-size: 15px;
  letter-spacing: 1px;
  margin-top: 4px;
}
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  letter-spacing: 3px;
}
@media (max-height: 800px) {
  .scroll-indicator { display: none; }
}
.mouse {
  width: 26px; height: 42px;
  border: 2px solid var(--text-dim);
  border-radius: 14px;
  margin: 0 auto 8px;
  position: relative;
}
.wheel {
  width: 4px; height: 8px;
  background: var(--primary);
  border-radius: 4px;
  margin: 6px auto;
  animation: wheel 1.6s infinite;
}
@keyframes wheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(14px); }
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.skill-card {
  position: relative;
  perspective: 1000px;
}
.skill-front {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  padding: 34px 28px;
  text-align: center;
  transition: transform 0.5s, box-shadow 0.5s, border-color 0.5s;
  overflow: hidden;
  height: 100%;
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.skill-front::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg, transparent 0%, rgba(2, 132, 199, 0.1) 10%, transparent 25%);
  animation: spin-slow 6s linear infinite;
  opacity: 0;
  transition: opacity 0.5s;
}
.skill-card:hover .skill-front {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: var(--glow-primary), var(--shadow);
}
.skill-card:hover .skill-front::before { opacity: 1; }
@keyframes spin-slow { to { transform: rotate(360deg); } }
.skill-icon {
  font-size: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 16px;
  display: inline-block;
}
.skill-front h3 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.skill-level {
  height: 8px;
  background: rgba(28, 36, 56, 0.08);
  border-radius: 6px;
  overflow: hidden;
}
.skill-level span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  border-radius: 6px;
  transition: width 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.skill-percent {
  display: block;
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}
.skill-info {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.1), rgba(124, 58, 237, 0.1));
  backdrop-filter: blur(8px);
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  opacity: 0;
  transform: rotateY(90deg);
  transition: opacity 0.5s, transform 0.5s;
  pointer-events: none;
}
.skill-info p { text-align: center; font-size: 16px; font-weight: 600; }
.skill-card:hover .skill-info {
  opacity: 1;
  transform: rotateY(0);
  pointer-events: auto;
}

/* ---------- Projects ---------- */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 10px 24px;
  border-radius: 50px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-dim);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.filter-btn:hover, .filter-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.25);
  transform: translateY(-2px);
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.project-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform 0.4s, box-shadow 0.4s, opacity 0.4s, scale 0.4s;
  transform-style: preserve-3d;
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.project-card.hidden { display: none; }
.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 14px 40px rgba(2, 132, 199, 0.18), var(--shadow);
  border-color: var(--primary);
}
.project-visual {
  position: relative;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 30% 30%, rgba(2, 132, 199, 0.12), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(124, 58, 237, 0.12), transparent 60%),
    var(--bg-2);
  overflow: hidden;
}
.project-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(2, 132, 199, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}
.visual-shape {
  position: relative;
  z-index: 1;
  width: 84px; height: 84px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: var(--primary);
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(2, 132, 199, 0.35);
  border-radius: 20px;
  transition: transform 0.5s;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-12px) rotate(2deg); }
}
.shape-globe { border-radius: 50%; animation-delay: 0s; }
.shape-pipette { animation-delay: 0.3s; }
.shape-scan { animation-delay: 0.6s; }
.shape-dna { border-radius: 50%; animation-delay: 0.9s; }
.shape-kiosk { animation-delay: 1.2s; }
.shape-phone { border-radius: 50%; animation-delay: 1.5s; }
.shape-wechat { border-radius: 50%; animation-delay: 1.8s; }
.shape-chart { animation-delay: 2.1s; }
.project-card:hover .visual-shape { transform: scale(1.15) rotate(10deg); }
.project-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.4s;
}
.project-card:hover .project-overlay { opacity: 1; }
.project-body { padding: 24px; }
.project-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--primary);
  border: 1px solid rgba(2, 132, 199, 0.4);
  border-radius: 4px;
  padding: 3px 10px;
  margin-bottom: 12px;
}
.project-body h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.project-body p {
  color: var(--text-dim);
  font-size: 15px;
  margin-bottom: 14px;
}
.project-tech { display: flex; gap: 8px; flex-wrap: wrap; }
.project-tech span {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(124, 58, 237, 0.1);
  color: #6d28d9;
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}
.timeline-line {
  position: absolute;
  top: 0; bottom: 0;
  left: 24px;
  width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--primary-2), transparent);
}
.timeline-item {
  position: relative;
  padding-left: 80px;
  margin-bottom: 48px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: 24px;
  top: 8px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--primary);
  transform: translateX(-50%);
  box-shadow: var(--glow-primary);
}
.timeline-dot::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--primary);
}
.timeline-content {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 26px 30px;
  backdrop-filter: blur(12px);
  transition: transform 0.4s, box-shadow 0.4s, border-color 0.4s;
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.timeline-content:hover {
  transform: translateX(8px);
  border-color: var(--primary);
  box-shadow: var(--glow-primary), var(--shadow);
}
.timeline-year {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
  margin-bottom: 6px;
}
.timeline-content h3 { font-size: 24px; font-weight: 700; }
.timeline-role {
  display: inline-block;
  color: var(--primary);
  font-size: 15px;
  letter-spacing: 1px;
  margin: 6px 0 12px;
}
.timeline-content p { color: var(--text-dim); font-size: 16px; margin-bottom: 14px; }
.timeline-tech { display: flex; gap: 8px; flex-wrap: wrap; }
.timeline-tech span {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(2, 132, 199, 0.1);
  color: var(--primary);
  border: 1px solid rgba(2, 132, 199, 0.25);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}
.about-visual {
  text-align: center;
  overflow: hidden;
}
@supports (overflow: clip) {
  .about-visual { overflow: clip; }
}
.about-avatar {
  position: relative;
  width: 260px; height: 260px;
  margin: 0 auto 40px;
}
.avatar-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 90px;
  color: var(--primary);
  background: linear-gradient(135deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  box-shadow: var(--shadow);
  z-index: 2;
}
.orbit {
  position: absolute;
  inset: -24px;
  border: 1px dashed rgba(2, 132, 199, 0.35);
  border-radius: 50%;
  animation: rotate 14s linear infinite;
}
.orbit::before {
  content: '';
  position: absolute;
  top: 50%; left: -5px;
  width: 10px; height: 10px;
  background: var(--primary);
  border-radius: 50%;
}
.orbit-1 { animation-duration: 14s; }
.orbit-2 { inset: -48px; animation-duration: 20s; animation-direction: reverse; border-color: rgba(124, 58, 237, 0.35); }
.orbit-2::before { background: var(--primary-2); left: auto; right: -5px; }
.orbit-3 { inset: -72px; animation-duration: 26s; border-style: solid; border-color: rgba(225, 29, 111, 0.25); }
.orbit-3::before { background: var(--accent); }
@keyframes rotate { to { transform: rotate(360deg); } }
.about-quote {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(12px);
  position: relative;
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.about-quote i {
  color: var(--primary);
  font-size: 28px;
  margin-bottom: 10px;
  display: block;
}
.about-quote p { font-size: 20px; font-weight: 600; font-style: italic; margin-bottom: 10px; }
.about-quote span { color: var(--primary); font-family: var(--font-display); letter-spacing: 1px; }
.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}
.info-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px 22px;
  backdrop-filter: blur(12px);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.info-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}
.info-icon {
  width: 48px; height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  background: rgba(2, 132, 199, 0.1);
  border-radius: 12px;
}
.info-label {
  display: block;
  color: var(--text-dim);
  font-size: 14px;
  letter-spacing: 1px;
}
.info-value {
  display: block;
  font-size: 18px;
  font-weight: 700;
  margin-top: 2px;
}
.status-open {
  color: var(--success);
  animation: pulse 2s infinite;
}
.about-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.about-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 50px;
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.25);
  color: #6d28d9;
  font-size: 14px;
  font-weight: 600;
}
.about-badge i { color: var(--primary-2); }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: start;
}
.contact-info h3 {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 16px;
}
.contact-info > p { color: var(--text-dim); margin-bottom: 32px; font-size: 17px; }
.contact-methods { display: flex; flex-direction: column; gap: 18px; margin-bottom: 36px; }
.contact-method {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  backdrop-filter: blur(12px);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  position: relative;
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.contact-method:hover {
  transform: translateX(8px);
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}
.method-icon {
  width: 48px; height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  background: rgba(2, 132, 199, 0.1);
  border-radius: 12px;
}
.method-label { display: block; color: var(--text-dim); font-size: 14px; }
.method-value { display: block; font-size: 18px; font-weight: 700; letter-spacing: 0.5px; }
.method-arrow { margin-left: auto; color: var(--primary); opacity: 0; transition: opacity 0.3s, transform 0.3s; }
.contact-method:hover .method-arrow { opacity: 1; transform: rotate(45deg); }
.contact-socials { display: flex; gap: 14px; }
.social-btn {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-dim);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  transition: all 0.3s;
}
.social-btn:hover {
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-color: transparent;
  transform: translateY(-4px) rotate(10deg);
  box-shadow: var(--glow-primary);
}
.contact-form {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 36px;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(30, 60, 120, 0.06);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #9aa3b8; }
.form-group select { cursor: pointer; }
.form-group select option { background: #ffffff; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 50px 0 40px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
}
.footer-inner { text-align: center; }
.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-tagline { color: var(--text-dim); margin-bottom: 20px; font-size: 16px; }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}
.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--primary); }
.footer-copy { color: var(--text-dim); font-size: 14px; letter-spacing: 1px; }
.footer-heart { color: var(--accent); animation: heartbeat 1.4s infinite; display: inline-block; }
@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.3); }
  40% { transform: scale(1); }
  60% { transform: scale(1.2); }
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: 30px; right: 30px;
  width: 48px; height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #ffffff;
  border: none;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s;
  z-index: 900;
  box-shadow: var(--glow-primary), 0 8px 24px rgba(2, 132, 199, 0.25);
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ---------- Responsive ---------- */
@media (hover: none), (pointer: coarse) {
  .nav.scrolled,
  .hero-badge,
  .skill-front,
  .skill-info,
  .project-card,
  .timeline-content,
  .about-quote,
  .info-card,
  .contact-method,
  .contact-form,
  .footer {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background-color: rgba(255, 255, 255, 0.95);
  }
  .nav-links.open {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background-color: rgba(245, 248, 253, 0.98);
  }
}
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(3, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .nav-links, .nav-cta { display: none; }
  .nav-links.open {
    display: flex;
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    background: rgba(245, 248, 253, 0.96);
    backdrop-filter: blur(20px);
    z-index: 1000;
  }
  .nav-links.open .nav-link { font-size: 24px; }
  .nav-links.open .nav-link.active {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    padding: 12px 34px;
    border-radius: 50px;
    box-shadow: 0 6px 18px rgba(2, 132, 199, 0.25);
  }
  .nav-links.open .nav-link.active::after { display: none; }
  .hamburger { display: flex; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .projects-grid, .skills-grid, .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 30px; }
  .info-grid { grid-template-columns: 1fr; }
  .nav { padding: 14px 20px; }
  .nav.scrolled { padding: 10px 20px; }
  .section { padding: 40px 0; }
  .timeline-item { padding-left: 60px; }
}