:root {
  --bg-primary: #FAFAFA;
  --bg-secondary: #F0F0F0;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --accent: #14B8A6;
  --accent2: #8B5CF6;
  --accent3: #F59E0B;
  --accent-hover: #0D9488;
  --accent-soft: rgba(20, 184, 166, 0.08);
  --accent2-soft: rgba(139, 92, 246, 0.08);
  --btn-bg: #111827;
  --btn-hover: #374151;
  --card-bg: #FFFFFF;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --card-hover-shadow: 0 8px 40px rgba(0,0,0,0.08);
  --nav-bg: rgba(250, 250, 250, 0.88);
  --border-color: #E5E7EB;
  --skill-bg: #F3F4F6;
  --tag-bg: #F0F0F0;
  --gradient-hero: linear-gradient(135deg, #FAFAFA 0%, #F0FDFA 50%, #FAFAFA 100%);
  --gradient-accent: linear-gradient(135deg, #14B8A6, #0D9488);
  --gradient-btn: linear-gradient(135deg, #111827, #1F2937);
  --max-width: 1120px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bg-primary: #111111;
  --bg-secondary: #161616;
  --text-primary: #FFFFFF;
  --text-secondary: #B3B3B3;
  --accent: #14B8A6;
  --accent2: #A78BFA;
  --accent3: #FBBF24;
  --accent-hover: #2DD4BF;
  --accent-soft: rgba(20, 184, 166, 0.12);
  --accent2-soft: rgba(167, 139, 250, 0.12);
  --btn-bg: #14B8A6;
  --btn-hover: #0D9488;
  --card-bg: #1A1A1A;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.2), 0 4px 16px rgba(0,0,0,0.2);
  --card-hover-shadow: 0 8px 40px rgba(0,0,0,0.4);
  --nav-bg: rgba(17, 17, 17, 0.9);
  --border-color: #252525;
  --skill-bg: #222222;
  --tag-bg: #222222;
  --gradient-hero: linear-gradient(135deg, #111111 0%, #0D2B26 50%, #111111 100%);
  --gradient-accent: linear-gradient(135deg, #14B8A6, #0D9488);
  --gradient-btn: linear-gradient(135deg, #14B8A6, #0D9488);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: white; }
.container { max-width: var(--max-width); margin:0 auto; padding:0 28px; }

/* Loader */
.loader {
  position: fixed; inset:0; z-index:9999;
  background: var(--gradient-hero);
  display:flex; align-items:center; justify-content:center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
.loader.hidden { opacity:0; visibility:hidden; }
.loader-content { text-align:center; }
.loader-logo { font-size:3rem; font-weight:900; background:var(--gradient-accent); -webkit-background-clip:text; -webkit-text-fill-color:transparent; letter-spacing:-2px; }
.loader-bar { width:160px; height:3px; background:var(--border-color); border-radius:2px; margin:20px auto 0; overflow:hidden; }
.loader-fill { width:0; height:100%; background:var(--gradient-accent); border-radius:2px; animation:loaderAnim 1.6s ease forwards; }
@keyframes loaderAnim { 0% { width:0; } 100% { width:100%; } }

/* Section */
.section { padding:120px 0; }
.section-title {
  font-size:2rem; font-weight:800; text-align:center; margin-bottom:64px;
  display:flex; align-items:center; justify-content:center; gap:16px;
  color: var(--text-primary); letter-spacing:-0.5px;
}
.title-line { display:inline-block; width:40px; height:3px; border-radius:2px; background:var(--gradient-accent); }

/* Navbar */
.navbar {
  position:fixed; top:0; left:0; right:0; z-index:1000;
  background:var(--nav-bg); backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border-color);
  transition: transform 0.4s ease, background 0.3s, border-color 0.3s;
}
.navbar.hidden { transform:translateY(-100%); }
.nav-container {
  max-width:var(--max-width); margin:0 auto; padding:0 28px;
  display:flex; align-items:center; justify-content:space-between; height:68px;
}
.nav-logo { font-size:1.3rem; font-weight:900; background:var(--gradient-accent); -webkit-background-clip:text; -webkit-text-fill-color:transparent; text-decoration:none; letter-spacing:-1px; }
.nav-links { display:flex; list-style:none; gap:32px; }
.nav-links a {
  text-decoration:none; color:var(--text-secondary); font-weight:500; font-size:0.88rem;
  transition:color 0.25s; position:relative; padding:4px 0;
}
.nav-links a::after {
  content:''; position:absolute; bottom:-2px; left:0; width:0; height:2px;
  background:var(--gradient-accent); transition:width 0.35s ease; border-radius:1px;
}
.nav-links a:hover, .nav-links a.active { color:var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { width:100%; }
.nav-actions { display:flex; align-items:center; gap:12px; }

.theme-toggle {
  background:none; border:1px solid var(--border-color); border-radius:8px;
  padding:8px 11px; cursor:pointer; color:var(--text-primary);
  font-size:0.95rem; transition:all 0.3s ease;
}
.theme-toggle:hover { background:var(--accent-soft); border-color:var(--accent); transform:rotate(15deg); }

.hamburger { display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:4px; }
.hamburger span { display:block; width:22px; height:2px; background:var(--text-primary); border-radius:2px; transition:0.3s; }

/* Hero */
.hero {
  min-height:100vh; display:flex; align-items:center;
  padding:120px 28px 80px; position:relative; overflow:hidden;
  background: var(--gradient-hero);
}
.hero::before {
  content:''; position:absolute; top:-30%; right:-5%;
  width:600px; height:600px; border-radius:50%;
  background:radial-gradient(circle, var(--accent-soft) 0%, transparent 70%);
  pointer-events:none;
}
.hero::after {
  content:''; position:absolute; bottom:-20%; left:-5%;
  width:400px; height:400px; border-radius:50%;
  background:radial-gradient(circle, var(--accent2-soft) 0%, transparent 70%);
  pointer-events:none;
}

.hero-content {
  max-width:var(--max-width); margin:0 auto;
  display:flex; align-items:center; justify-content:space-between; gap:80px;
  width:100%; position:relative; z-index:1;
}
.hero-text { flex:1; }
.hero-greeting { font-size:1.1rem; color:var(--accent); font-weight:600; margin-bottom:8px; letter-spacing:1px; }
.hero-name { font-size:4.5rem; font-weight:900; line-height:1.05; margin-bottom:12px; letter-spacing:-3px; background:var(--gradient-accent); background-size:200% auto; -webkit-background-clip:text; -webkit-text-fill-color:transparent; animation:shimmer 4s ease infinite; }
@keyframes shimmer { 0%,100% { background-position:0% center; } 50% { background-position:200% center; } }
.hero-title { font-size:1.3rem; color:var(--text-secondary); margin-bottom:12px; font-weight:400; }
.hero-desc { font-size:1.05rem; color:var(--text-secondary); max-width:480px; margin-bottom:36px; line-height:1.8; }
.hero-buttons { display:flex; gap:14px; margin-bottom:32px; flex-wrap:wrap; }

.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 34px; border-radius:50px; font-weight:600; font-size:0.9rem;
  text-decoration:none; transition:all 0.35s cubic-bezier(0.4,0,0.2,1);
  cursor:pointer; font-family:var(--font); border:none;
  position:relative; overflow:hidden;
}
.btn::after {
  content:''; position:absolute; top:50%; left:50%;
  width:0; height:0; border-radius:50%;
  background:rgba(255,255,255,0.15);
  transition:width 0.6s ease, height 0.6s ease; transform:translate(-50%,-50%);
}
.btn:active::after { width:400px; height:400px; }
.btn-primary { background:var(--gradient-btn); color:#FFFFFF; }
.btn-primary:hover { background:var(--btn-hover); transform:scale(1.05); box-shadow:0 12px 30px rgba(0,0,0,0.15); }
.btn-outline { border:2px solid var(--accent); color:var(--accent); background:transparent; }
.btn-outline:hover { background:var(--gradient-accent); color:white; transform:scale(1.05); box-shadow:0 12px 30px rgba(20,184,166,0.25); border-color:transparent; }

.hero-socials { display:flex; gap:14px; }
.hero-socials a {
  display:flex; align-items:center; justify-content:center;
  width:46px; height:46px; border-radius:50%;
  border:1.5px solid var(--border-color); color:var(--text-secondary);
  font-size:1.15rem; text-decoration:none;
  transition:all 0.35s cubic-bezier(0.4,0,0.2,1); background:var(--card-bg);
}
.hero-socials a:nth-child(1):hover { color:#333; border-color:#333; transform:translateY(-4px) scale(1.08); box-shadow:0 8px 24px rgba(0,0,0,0.08); }
.hero-socials a:nth-child(2):hover { color:#0077B5; border-color:#0077B5; transform:translateY(-4px) scale(1.08); box-shadow:0 8px 24px rgba(0,0,0,0.08); }
.hero-socials a:nth-child(3):hover { color:var(--accent); border-color:var(--accent); transform:translateY(-4px) scale(1.08); box-shadow:0 8px 24px rgba(0,0,0,0.08); }
.hero-socials a:nth-child(4):hover { color:var(--accent3); border-color:var(--accent3); transform:translateY(-4px) scale(1.08); box-shadow:0 8px 24px rgba(0,0,0,0.08); }

.hero-image { flex-shrink:0; }
.hero-avatar {
  width:340px; height:340px; border-radius:50%; overflow:hidden;
  border:3px solid transparent; background-image:var(--gradient-accent); background-origin:border-box; background-clip:padding-box, border-box;
  box-shadow:0 24px 72px rgba(20,184,166,0.15);
  animation:float 6s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-14px); } }
.hero-avatar:hover { animation-play-state:paused; }
.hero-avatar img { width:100%; height:100%; object-fit:cover; border-radius:50%; padding:3px; }

.scroll-indicator { position:absolute; bottom:32px; left:50%; transform:translateX(-50%); }
.mouse { width:20px; height:32px; border:2px solid var(--text-secondary); border-radius:10px; position:relative; opacity:0.4; }
.mouse-wheel {
  position:absolute; top:6px; left:50%; transform:translateX(-50%);
  width:2.5px; height:7px; background:var(--accent); border-radius:2px;
  animation:scrollAnim 1.6s ease infinite;
}
@keyframes scrollAnim { 0% { opacity:1; transform:translateX(-50%) translateY(0); } 100% { opacity:0; transform:translateX(-50%) translateY(12px); } }

/* About */
.about { background:var(--bg-secondary); position:relative; }
.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:start; }
.about-left p { margin-bottom:18px; color:var(--text-secondary); font-size:1.05rem; line-height:1.8; }
.about-left p strong { color:var(--text-primary); font-weight:600; }
.about-intro { font-size:1.15rem !important; }

.about-info { margin-top:32px; display:grid; gap:12px; }
.info-item { display:flex; gap:12px; padding:10px 0; border-bottom:1px solid var(--border-color); }
.info-label { font-weight:600; font-size:0.85rem; color:var(--accent); min-width:80px; text-transform:uppercase; letter-spacing:0.5px; }
.info-value { font-size:0.95rem; color:var(--text-primary); }

.about-stats { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.stat-card {
  text-align:center; padding:28px 20px; background:var(--card-bg);
  border:1px solid var(--border-color); border-radius:var(--radius);
  transition:all 0.35s cubic-bezier(0.4,0,0.2,1); cursor:default;
  position:relative; overflow:hidden;
}
.stat-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:var(--gradient-accent);
}
.stat-card:nth-child(2)::before { background:linear-gradient(135deg, var(--accent2), #7C3AED); }
.stat-card:nth-child(3)::before { background:linear-gradient(135deg, var(--accent3), #D97706); }
.stat-card:nth-child(4)::before { background:linear-gradient(135deg, #EC4899, #DB2777); }
.stat-card:hover { transform:translateY(-6px); box-shadow:var(--card-hover-shadow); }
.stat-number { display:block; font-size:2.2rem; font-weight:900; background:var(--gradient-accent); -webkit-background-clip:text; -webkit-text-fill-color:transparent; margin-bottom:4px; letter-spacing:-1px; }
.stat-card:nth-child(2) .stat-number { background:linear-gradient(135deg, var(--accent2), #7C3AED); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.stat-card:nth-child(3) .stat-number { background:linear-gradient(135deg, var(--accent3), #D97706); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.stat-card:nth-child(4) .stat-number { background:linear-gradient(135deg, #EC4899, #DB2777); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.stat-label { font-size:0.82rem; color:var(--text-secondary); font-weight:500; text-transform:uppercase; letter-spacing:0.5px; }

.about-education { margin-top:32px; background:var(--card-bg); border:1px solid var(--border-color); border-radius:var(--radius); padding:24px; }
.about-education h3 { font-size:1rem; font-weight:700; margin-bottom:16px; display:flex; align-items:center; gap:8px; color:var(--accent); }
.about-education h3 i { font-size:1.1rem; }
.edu-item { display:flex; align-items:center; justify-content:space-between; padding:12px 0; border-bottom:1px solid var(--border-color); }
.edu-item:last-child { border-bottom:none; }
.edu-degree { font-weight:600; font-size:0.9rem; color:var(--text-primary); }
.edu-school { font-size:0.85rem; color:var(--text-secondary); }
.edu-year { font-size:0.8rem; color:var(--accent); padding:2px 10px; border:1px solid var(--accent); border-radius:12px; font-weight:500; }

/* Timeline */
.timeline { position:relative; max-width:660px; margin:0 auto; padding-left:28px; }
.timeline::before { content:''; position:absolute; left:6px; top:8px; bottom:8px; width:2px; background:var(--gradient-accent); opacity:0.5; }
.timeline-item { position:relative; margin-bottom:36px; }
.timeline-dot {
  position:absolute; left:-28px; top:8px; width:14px; height:14px;
  border-radius:50%; background:var(--gradient-accent); border:3px solid var(--bg-secondary);
  z-index:1; transition:transform 0.3s ease;
}
.timeline-item:hover .timeline-dot { transform:scale(1.4); }
.timeline-content {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:var(--radius); padding:24px 28px;
  transition:all 0.35s cubic-bezier(0.4,0,0.2,1);
}
.timeline-content:hover { transform:translateX(6px); box-shadow:var(--card-hover-shadow); border-color:var(--accent); }
.timeline-tag { display:inline-block; font-size:0.75rem; color:var(--accent); font-weight:600; padding:3px 14px; border:1px solid var(--accent); border-radius:20px; margin-bottom:10px; }
.timeline-content h3 { font-size:1.15rem; font-weight:700; margin-bottom:4px; }
.timeline-company { font-size:0.9rem; font-weight:500; color:var(--text-secondary); margin-bottom:10px; }
.timeline-content p { color:var(--text-secondary); font-size:0.9rem; line-height:1.7; }

/* Projects */
.projects-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(340px,1fr)); gap:24px; }
.project-card {
  background:var(--card-bg); border:1px solid var(--border-color);
  border-radius:var(--radius-lg); overflow:hidden;
  transition:all 0.45s cubic-bezier(0.4,0,0.2,1);
}
.project-card:hover { transform:translateY(-10px); box-shadow:var(--card-hover-shadow); border-color:var(--accent); }
.project-img { height:200px; overflow:hidden; position:relative; }
.project-card:nth-child(1) .project-placeholder { background:linear-gradient(135deg, #0D9488, #14B8A6); }
.project-card:nth-child(2) .project-placeholder { background:linear-gradient(135deg, #7C3AED, #8B5CF6); }
.project-card:nth-child(3) .project-placeholder { background:linear-gradient(135deg, #D97706, #F59E0B); }
.project-placeholder {
  width:100%; height:100%; display:flex; align-items:center; justify-content:center;
  transition:transform 0.6s ease;
}
.project-card:hover .project-placeholder { transform:scale(1.08); }
.project-placeholder i { font-size:3rem; color:rgba(255,255,255,0.2); }
.project-body { padding:24px; }
.project-body h3 { font-size:1.1rem; font-weight:700; margin-bottom:10px; }
.project-body p { color:var(--text-secondary); font-size:0.88rem; line-height:1.7; margin-bottom:16px; }
.project-tech { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:18px; }
.project-tech span { padding:4px 14px; background:var(--tag-bg); border-radius:20px; font-size:0.75rem; font-weight:500; color:var(--text-primary); }
.project-links { display:flex; gap:10px; }

.btn-sm {
  display:inline-flex; align-items:center; gap:6px;
  padding:8px 20px; border-radius:50px; font-weight:600; font-size:0.8rem;
  text-decoration:none; transition:all 0.3s ease;
  background:var(--gradient-accent); color:white; border:none; cursor:pointer;
}
.btn-sm.outline { background:transparent; border:1.5px solid var(--border-color); color:var(--text-primary); }
.btn-sm:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(20,184,166,0.2); }
.btn-sm.outline:hover { border-color:var(--accent); color:var(--accent); }

/* Skills */
.skills { background:var(--bg-secondary); position:relative; }
.skills-content { display:grid; gap:40px; }
.skill-group h3 { font-size:0.85rem; font-weight:700; margin-bottom:18px; color:var(--accent); text-transform:uppercase; letter-spacing:1px; }
.skill-cards { display:flex; flex-wrap:wrap; gap:12px; }
.skill-card {
  display:flex; align-items:center; gap:10px;
  padding:14px 24px; background:var(--card-bg);
  border:1px solid var(--border-color); border-radius:var(--radius-sm);
  transition:all 0.35s cubic-bezier(0.4,0,0.2,1); cursor:default;
}
.skill-card:hover { transform:translateY(-4px); box-shadow:var(--card-hover-shadow); border-color:var(--accent); }
.skill-icon { width:36px; height:36px; display:flex; align-items:center; justify-content:center; border-radius:8px; background:var(--accent-soft); font-size:1rem; color:var(--accent); transition:transform 0.3s ease; }
.skill-card:hover .skill-icon { transform:rotate(-8deg) scale(1.1); background:var(--gradient-accent); color:white; }
.skill-card span { font-size:0.85rem; font-weight:500; color:var(--text-primary); }

/* Contact */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:start; }
.contact-subtitle { font-size:1.05rem; color:var(--text-secondary); margin-bottom:32px; line-height:1.8; }
.contact-details { display:flex; flex-direction:column; gap:16px; }
.contact-item {
  display:flex; align-items:center; gap:14px;
  padding:14px 20px; background:var(--card-bg);
  border:1px solid var(--border-color); border-radius:var(--radius-sm);
  text-decoration:none; color:var(--text-primary); font-size:0.9rem;
  transition:all 0.3s ease; font-weight:500;
}
.contact-item i { font-size:1.1rem; color:var(--text-secondary); transition:transform 0.3s ease; }
.contact-item:hover { transform:translateY(-3px); box-shadow:var(--card-hover-shadow); border-color:var(--accent); }
.contact-item:hover i { transform:scale(1.2); color:var(--accent); }

.contact-form { display:flex; flex-direction:column; gap:16px; }
.contact-form input, .contact-form textarea {
  padding:14px 18px; border:1px solid var(--border-color); border-radius:var(--radius-sm);
  background:var(--card-bg); color:var(--text-primary); font-family:var(--font);
  font-size:0.9rem; transition:border-color 0.3s ease; outline:none;
}
.contact-form input:focus, .contact-form textarea:focus { border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft); }
.contact-form input::placeholder, .contact-form textarea::placeholder { color:var(--text-secondary); }
.contact-form button { align-self:flex-start; }

/* Footer */
.footer { padding:40px 0; text-align:center; border-top:1px solid var(--border-color); }
.footer-socials { display:flex; justify-content:center; gap:16px; margin-bottom:18px; }
.footer-socials a {
  display:flex; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:50%;
  border:1px solid var(--border-color); color:var(--text-secondary);
  font-size:1rem; text-decoration:none; transition:all 0.3s ease;
}
.footer-socials a:nth-child(1):hover { color:#333; border-color:#333; transform:translateY(-3px); }
.footer-socials a:nth-child(2):hover { color:#0077B5; border-color:#0077B5; transform:translateY(-3px); }
.footer-socials a:nth-child(3):hover { color:var(--accent); border-color:var(--accent); transform:translateY(-3px); }
.footer-socials a:nth-child(4):hover { color:var(--accent3); border-color:var(--accent3); transform:translateY(-3px); }
.footer p { color:var(--text-secondary); font-size:0.82rem; }
.footer .footer-accent { color:var(--accent); font-weight:600; }

/* Reveal Animations */
.fade-up, .reveal-text, .reveal-scale { opacity:0; transform:translateY(30px); transition:opacity 0.8s ease, transform 0.8s ease; }
.reveal-scale { transform:scale(0.95); }
.visible.fade-up { opacity:1; transform:translateY(0); }
.visible.reveal-text { opacity:1; transform:translateY(0); }
.visible.reveal-scale { opacity:1; transform:scale(1); }

/* Responsive */
@media (max-width:968px) {
  .hero-content { flex-direction:column-reverse; text-align:center; gap:40px; }
  .hero-text { display:flex; flex-direction:column; align-items:center; }
  .hero-desc { max-width:100%; }
  .hero-buttons { justify-content:center; }
  .hero-socials { justify-content:center; }
  .hero-avatar { width:260px; height:260px; }
  .hero-name { font-size:3rem; letter-spacing:-2px; }
  .hero::before, .hero::after { display:none; }
  .about-grid, .contact-grid { grid-template-columns:1fr; gap:40px; }
}

@media (max-width:768px) {
  .nav-links {
    display:none; position:absolute; top:68px; left:0; right:0;
    flex-direction:column; background:var(--nav-bg); backdrop-filter:blur(16px);
    padding:20px 28px; gap:16px; border-bottom:1px solid var(--border-color);
  }
  .nav-links.active { display:flex; }
  .hamburger { display:flex; }
  .hero { padding:100px 24px 60px; }
  .hero-name { font-size:2.4rem; letter-spacing:-1px; }
  .section { padding:80px 0; }
  .section-title { font-size:1.6rem; gap:12px; }
  .title-line { width:28px; }
  .projects-grid { grid-template-columns:1fr; }
  .about-stats { grid-template-columns:1fr 1fr; gap:12px; }
  .stat-card { padding:20px 16px; }
  .stat-number { font-size:1.8rem; }
  .contact-grid { gap:32px; }
  .contact-form button { align-self:stretch; text-align:center; justify-content:center; }
}