:root {
    --navy: #080808;
    --navy-mid: #111111;
    --navy-card: #181818;
    --navy-border: #2e2e2e;
    --electric: #ffffff;
    --electric-dim: #cccccc;
    --neon: #aaaaaa;
    --neon-dim: #888888;
    --text-primary: #f0f0f0;
    --text-secondary: #999999;
    --text-muted: #555555;
    --accent-warm: #dddddd;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
  }
  [data-theme="light"] {
    --navy: #f8f8f8;
    --navy-mid: #efefef;
    --navy-card: #ffffff;
    --navy-border: #d8d8d8;
    --electric: #000000;
    --electric-dim: #333333;
    --neon: #444444;
    --neon-dim: #666666;
    --text-primary: #0a0a0a;
    --text-secondary: #444444;
    --text-muted: #999999;
    --accent-warm: #222222;
  }
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font-body);
    background: var(--navy);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
  }

  /* SCROLLBAR */
  ::-webkit-scrollbar { width: 4px; }
  ::-webkit-scrollbar-track { background: var(--navy-mid); }
  ::-webkit-scrollbar-thumb { background: #555555; border-radius: 2px; }

  /* NAV */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 2.5rem;
    background: rgba(8,8,8,0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), background var(--transition);
  }
  [data-theme="light"] nav { background: rgba(248,248,248,0.88); }
  nav.scrolled { border-color: var(--navy-border); }
  .nav-logo {
    font-family: var(--font-display);
    font-weight: 800; font-size: 1.4rem;
    background: linear-gradient(135deg, #ffffff, #aaaaaa);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; text-decoration: none;
    letter-spacing: -0.02em;
  }
  [data-theme="light"] .nav-logo {
    background: linear-gradient(135deg, #111111, #555555);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .nav-links { display: flex; gap: 2rem; list-style: none; align-items: center; }
  .nav-links a {
    font-family: var(--font-mono); font-size: 0.8rem; font-weight: 400;
    color: var(--text-secondary); text-decoration: none;
    letter-spacing: 0.05em; text-transform: uppercase;
    transition: color var(--transition); position: relative;
  }
  .nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0;
    width: 0; height: 1px; background: var(--electric);
    transition: width var(--transition);
  }
  .nav-links a:hover { color: var(--electric); }
  .nav-links a:hover::after { width: 100%; }
  .theme-toggle {
    width: 44px; height: 24px; border-radius: 12px;
    background: var(--navy-border); border: 1px solid var(--navy-border);
    cursor: pointer; position: relative; transition: background var(--transition);
    flex-shrink: 0;
  }
  .theme-toggle::after {
    content: ''; position: absolute; top: 3px; left: 3px;
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--electric); transition: transform var(--transition), background var(--transition);
  }
  [data-theme="light"] .theme-toggle::after { transform: translateX(20px); background: var(--neon); }
  .nav-right { display: flex; align-items: center; gap: 1rem; }
  .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
  .hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 1px; transition: var(--transition); }

  /* MOBILE NAV */
  @media (max-width: 768px) {
    nav { padding: 1rem 1.5rem; }
    .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--navy-mid); padding: 1.5rem; gap: 1.2rem; border-bottom: 1px solid var(--navy-border); }
    .nav-links.open { display: flex; }
    .hamburger { display: flex; }
  }

  /* SECTIONS */
  section { padding: 6rem 2.5rem; max-width: 1200px; margin: 0 auto; }
  @media (max-width: 768px) { section { padding: 4rem 1.5rem; } }

  /* HERO */
  #hero {
    min-height: 100vh; display: flex; align-items: center;
    position: relative; overflow: hidden; padding-top: 6rem;
    max-width: 100%; padding-left: 2.5rem; padding-right: 2.5rem;
  }
  .hero-bg {
    position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(ellipse 80% 60% at 60% 40%, rgba(255,255,255,0.04) 0%, transparent 60%),
                radial-gradient(ellipse 50% 40% at 80% 80%, rgba(200,200,200,0.03) 0%, transparent 50%);
  }
  .hero-grid {
    position: absolute; inset: 0; pointer-events: none; opacity: 0.04;
    background-image: linear-gradient(rgba(255,255,255,0.5) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,255,255,0.5) 1px, transparent 1px);
    background-size: 60px 60px;
  }
  .hero-content { position: relative; z-index: 1; max-width: 800px; }
  .hero-tag {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em;
    color: var(--neon); text-transform: uppercase;
    margin-bottom: 1.5rem;
    opacity: 0; animation: fadeUp 0.6s 0.2s forwards;
  }
  .hero-tag::before { content: ''; width: 24px; height: 1px; background: var(--neon); }
  h1 {
    font-family: var(--font-display); font-weight: 800; font-size: clamp(2.4rem, 6vw, 4.5rem);
    line-height: 1.05; letter-spacing: -0.03em;
    opacity: 0; animation: fadeUp 0.7s 0.35s forwards;
  }
  .name-gradient {
    background: linear-gradient(135deg, #ffffff 0%, #888888 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  }
  [data-theme="light"] .name-gradient {
    background: linear-gradient(135deg, #111111 0%, #555555 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  }
  .hero-sub {
    font-size: 1.15rem; color: var(--text-secondary); max-width: 560px;
    margin-top: 1.2rem; line-height: 1.7; font-weight: 300;
    opacity: 0; animation: fadeUp 0.7s 0.5s forwards;
  }
  .hero-ctas {
    display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.5rem;
    opacity: 0; animation: fadeUp 0.7s 0.65s forwards;
  }
  .btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 0.8rem 1.8rem; border-radius: 6px;
    font-family: var(--font-mono); font-size: 0.82rem; font-weight: 500;
    letter-spacing: 0.04em; text-decoration: none; cursor: pointer;
    transition: all var(--transition); position: relative; overflow: hidden; border: none;
  }
  .btn-primary {
    background: #ffffff; color: #000000;
  }
  .btn-primary:hover { background: #dddddd; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,255,255,0.15); }
  [data-theme="light"] .btn-primary {
    background: #111111; color: #ffffff;
  }
  [data-theme="light"] .btn-primary:hover {
    background: #333333; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  }
  .btn-secondary {
    background: transparent; color: var(--electric);
    border: 1px solid var(--electric);
  }
  .btn-secondary:hover { background: rgba(0,212,255,0.08); transform: translateY(-2px); }
  .hero-scroll {
    position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted);
    letter-spacing: 0.1em; text-transform: uppercase; opacity: 0;
    animation: fadeUp 0.7s 1s forwards;
  }
  .hero-scroll span { margin-right: -0.1em; }
  .scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--electric), transparent); animation: scrollPulse 2s ease-in-out infinite; }

  /* SECTION TITLES */
  .section-label {
    font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em;
    color: var(--neon); text-transform: uppercase; display: flex; align-items: center; gap: 12px;
    margin-bottom: 0.8rem;
  }
  .section-label::before { content: ''; flex: 0 0 32px; height: 1px; background: var(--neon); }
  h2 {
    font-family: var(--font-display); font-weight: 700; font-size: clamp(1.8rem, 4vw, 2.8rem);
    letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 1rem;
  }
  .section-divider { width: 48px; height: 2px; background: linear-gradient(90deg, #ffffff, #555555); margin-bottom: 3rem; border-radius: 1px; }

  /* ABOUT */
  #about { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
  @media (max-width: 900px) { #about { grid-template-columns: 1fr; gap: 2.5rem; } }
  .about-img-wrap {
    position: relative;
  }
  .about-avatar {
    width: 100%; aspect-ratio: 1; border-radius: 12px;
    background: linear-gradient(135deg, var(--navy-card) 0%, var(--navy-mid) 100%);
    border: 1px solid var(--navy-border); display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display); font-size: 5rem; font-weight: 800;
    background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(180,180,180,0.05));
    color: var(--electric); position: relative; overflow: hidden;
    max-width: 320px; margin: 0 auto;
  }
  .about-avatar::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(0,212,255,0.1));
  }
  .about-corner {
    position: absolute; bottom: -8px; right: -8px; width: 120px; height: 120px;
    border-right: 2px solid rgba(255,255,255,0.5); border-bottom: 2px solid rgba(255,255,255,0.5);
    border-radius: 0 0 12px 0; pointer-events: none;
  }
  .about-text p { color: var(--text-secondary); font-size: 1rem; margin-bottom: 1rem; font-weight: 300; }
  .about-text p strong { color: var(--text-primary); font-weight: 500; }
  .about-stats { display: flex; gap: 2rem; margin-top: 2rem; flex-wrap: wrap; }
  .stat-item { display: flex; flex-direction: column; gap: 4px; }
  .stat-num { font-family: var(--font-display); font-weight: 800; font-size: 2rem; color: var(--electric); line-height: 1; }
  .stat-label { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }

  /* SKILLS */
  #skills { padding-top: 6rem; padding-bottom: 6rem; max-width: 1200px; margin: 0 auto; padding-left: 2.5rem; padding-right: 2.5rem; }
  .skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
  .skill-card {
    background: var(--navy-card); border: 1px solid var(--navy-border);
    border-radius: 10px; padding: 1.5rem;
    transition: border-color var(--transition), transform var(--transition);
  }
  .skill-card:hover { border-color: var(--electric); transform: translateY(-4px); }
  .skill-card-title {
    font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--electric); margin-bottom: 1.2rem;
    display: flex; align-items: center; gap: 8px;
  }
  .skill-card-title svg { width: 14px; height: 14px; }
  .skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
  .skill-tag {
    font-family: var(--font-mono); font-size: 0.75rem;
    padding: 5px 12px; border-radius: 4px;
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12);
    color: var(--text-secondary); transition: all var(--transition);
  }
  .skill-tag:hover { background: rgba(255,255,255,0.12); color: var(--electric); border-color: var(--electric); }
  .skill-tag.green { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.1); }
  .skill-tag.green:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); border-color: var(--text-secondary); }

  /* PROJECT MODAL */
  .project-modal-wrapper { position: fixed; inset: 0; z-index: 10000; display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity 0.3s; padding: 1rem; }
  .project-modal-wrapper.active { opacity: 1; pointer-events: auto; }
  .pm-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.8); backdrop-filter: blur(5px); }
  .pm-content { position: relative; z-index: 10001; background: var(--navy-card); border: 1px solid var(--navy-border); border-radius: 12px; width: 100%; max-width: 600px; max-height: 90vh; overflow-y: auto; padding: 2.5rem; transform: translateY(20px) scale(0.95); transition: transform 0.3s; }
  .project-modal-wrapper.active .pm-content { transform: translateY(0) scale(1); }
  .pm-close { position: absolute; top: 1.5rem; right: 1.5rem; background: none; border: none; color: #fff; font-size: 2rem; line-height: 1; cursor: pointer; opacity: 0.6; transition: opacity 0.2s; }
  .pm-close:hover { opacity: 1; }
  [data-theme="light"] .pm-close { color: #000; }
  .pm-body h3 { font-family: var(--font-display); font-size: 1.5rem; color: var(--text-primary); margin-bottom: 0.5rem; }
  .pm-body p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 1.5rem; font-weight: 300; }
  .pm-subtitle { font-weight: 600; color: var(--primary); margin-bottom: 0.75rem; display: block; margin-top: 1.5rem; font-size: 1.1rem; }
  .pm-body ul { list-style: none; padding: 0; margin-bottom: 1.5rem; }
  .pm-body ul li { position: relative; padding-left: 1.5rem; margin-bottom: 0.5rem; font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; font-weight: 300; }
  .pm-body ul li::before { content: '▹'; position: absolute; left: 0; color: var(--electric); font-size: 1rem; }
  .pm-links { display: flex; gap: 1rem; margin-top: 2rem; border-top: 1px solid var(--navy-border); padding-top: 1.5rem; }
  .project-card.clickable { cursor: pointer; }

  /* PROJECTS */
  #projects { padding-top: 6rem; padding-bottom: 6rem; max-width: 1200px; margin: 0 auto; padding-left: 2.5rem; padding-right: 2.5rem; }
  .projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }
  .project-card {
    background: var(--navy-card); border: 1px solid var(--navy-border);
    border-radius: 12px; padding: 1.8rem; display: flex; flex-direction: column;
    position: relative; overflow: hidden;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  }
  .project-card:hover { border-color: var(--electric); transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.08); }
  .project-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, #ffffff, #666666);
    opacity: 0; transition: opacity var(--transition);
  }
  .project-card:hover::before { opacity: 1; }
  .project-card.featured { border-color: rgba(255,255,255,0.25); }
  .project-card.featured::before { opacity: 1; }
  .project-badge {
    display: inline-block; font-family: var(--font-mono); font-size: 0.65rem;
    letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 10px;
    background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-primary); border-radius: 3px; margin-bottom: 1rem;
  }
  .project-title { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; letter-spacing: -0.01em; margin-bottom: 0.6rem; }
  .project-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.65; flex: 1; margin-bottom: 1.2rem; font-weight: 300; }
  .project-tech { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 1.5rem; }
  .tech-tag {
    font-family: var(--font-mono); font-size: 0.7rem; padding: 3px 10px;
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-muted); border-radius: 3px;
  }
  .project-links { display: flex; gap: 1rem; }
  .project-link {
    font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary);
    text-decoration: none; display: flex; align-items: center; gap: 5px;
    transition: color var(--transition); letter-spacing: 0.03em;
  }
  .project-link:hover { color: var(--electric); }
  .project-link svg { width: 13px; height: 13px; }

  /* CERTIFICATIONS */
  #certifications { padding-top: 6rem; padding-bottom: 6rem; max-width: 1200px; margin: 0 auto; padding-left: 2.5rem; padding-right: 2.5rem; }
  .cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
  .cert-card {
    display: flex; gap: 1rem; align-items: flex-start;
    background: var(--navy-card); border: 1px solid var(--navy-border);
    border-radius: 10px; padding: 1.2rem 1.5rem;
    transition: border-color var(--transition), transform var(--transition);
  }
  .cert-card:hover { border-color: var(--neon); transform: translateX(4px); }
  .cert-card.clickable { cursor: pointer; }
  .cert-icon {
    width: 36px; height: 36px; flex-shrink: 0; border-radius: 8px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(180,180,180,0.05));
    border: 1px solid rgba(255,255,255,0.15);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
  }
  .cert-title { font-weight: 500; font-size: 0.9rem; margin-bottom: 2px; }
  .cert-issuer { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.03em; }

  /* CONTACT */
  #contact { padding-top: 6rem; padding-bottom: 6rem; max-width: 1200px; margin: 0 auto; padding-left: 2.5rem; padding-right: 2.5rem; }
  .contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 4rem; align-items: start; }
  @media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; } }
  .contact-info p { color: var(--text-secondary); font-size: 0.95rem; font-weight: 300; margin-bottom: 2rem; line-height: 1.7; }
  .contact-links { display: flex; flex-direction: column; gap: 0.8rem; }
  .contact-link {
    display: flex; align-items: center; gap: 12px;
    font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-secondary);
    text-decoration: none; padding: 10px 0;
    border-bottom: 1px solid var(--navy-border);
    transition: color var(--transition), border-color var(--transition);
    letter-spacing: 0.02em;
  }
  .contact-link:hover { color: var(--electric); border-color: var(--electric); }
  .contact-link svg { width: 16px; height: 16px; color: var(--electric); flex-shrink: 0; }
  .contact-form { display: flex; flex-direction: column; gap: 1rem; }
  .c-txt { display: inline-block !important; visibility: visible !important; color: #a1a1aa !important; font-family: var(--font-mono); }
  .form-group { display: flex; flex-direction: column; gap: 6px; }
  .form-group label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.1em; text-transform: uppercase; }
  .form-group input, .form-group textarea {
    background: var(--navy-card); border: 1px solid var(--navy-border);
    border-radius: 6px; padding: 0.75rem 1rem; color: var(--text-primary);
    font-family: var(--font-body); font-size: 0.9rem; font-weight: 300;
    transition: border-color var(--transition), box-shadow var(--transition); outline: none; resize: vertical;
  }
  .form-group input:focus, .form-group textarea:focus {
    border-color: var(--electric); box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
  }
  .form-group textarea { min-height: 120px; }
  .form-status { font-family: var(--font-mono); font-size: 0.78rem; padding: 0.6rem 1rem; border-radius: 5px; display: none; }
  .form-status.success { background: rgba(255,255,255,0.07); color: #e0e0e0; border: 1px solid rgba(255,255,255,0.2); display: block; }
  .form-status.error { background: rgba(255,100,100,0.1); color: #ff6464; border: 1px solid rgba(255,100,100,0.3); display: block; }

  /* FOOTER */
  footer {
    border-top: 1px solid var(--navy-border); padding: 2rem 2.5rem;
    display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  }
  .footer-name { font-family: var(--font-display); font-weight: 700; color: var(--electric); }
  .footer-copy { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); }

  /* ANIMATIONS */
  @keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
  @keyframes scrollPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
  .reveal.visible { opacity: 1; transform: none; }
  .reveal-delay-1 { transition-delay: 0.1s; }
  .reveal-delay-2 { transition-delay: 0.2s; }
  .reveal-delay-3 { transition-delay: 0.3s; }
  .reveal-delay-4 { transition-delay: 0.4s; }

  /* CURSOR GLOW */
  .cursor-glow {
    position: fixed; pointer-events: none; z-index: 9999;
    width: 280px; height: 280px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
    transform: translate(-50%, -50%); transition: opacity 0.3s;
  }
  @media (max-width: 768px) { 
    .cursor-glow { display: none; } 
    .hero-scroll { display: none; }
  }

  /* ACTIVE NAV */
  .nav-links a.active { color: var(--electric); }
  .nav-links a.active::after { width: 100%; }

  /* LIGHT MODE SPECIFIC UI OVERRIDES */
  [data-theme="light"] .tech-tag,
  [data-theme="light"] .skill-tag {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-secondary);
  }
  [data-theme="light"] .skill-tag.green {
    background: rgba(0, 200, 83, 0.1);
    border-color: rgba(0, 200, 83, 0.3);
    color: #0b8036;
  }
  [data-theme="light"] .c-txt {
    color: #0f172a !important; /* Pitch dark slate for high readability on white */
    font-weight: 500;
  }
  [data-theme="light"] .project-modal-content, [data-theme="light"] .pm-content {
    background: #ffffff;
    border-color: #cbd5e1;
  }

  /* MOBILE GRID COMPACTION */
  @media (max-width: 480px) {
    .projects-grid, .skills-grid, .cert-grid { grid-template-columns: 1fr; }
  }