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

    /* ===== CSS VARIABLES ===== */
    :root {
      --bg: #f5f6fa;
      --fg: #1a1e36;
      --card: #ffffff;
      --card-fg: #1a1e36;
      --primary: #3b5de7;
      --primary-fg: #f8f9fc;
      --secondary: #ebeef8;
      --secondary-fg: #2a2f4a;
      --muted: #e5e8f2;
      --muted-fg: #6b7194;
      --accent: #4a6cf7;
      --accent-fg: #ffffff;
      --border: #dcdfe9;
      --radius: 0.5rem;
      --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
      --font-serif: 'Playfair Display', Georgia, serif;
    }

    html.dark {
      --bg: #0f1129;
      --fg: #e4e6f0;
      --card: #171a34;
      --card-fg: #e4e6f0;
      --primary: #5b7bf9;
      --primary-fg: #f8f9fc;
      --secondary: #1e2145;
      --secondary-fg: #d4d7e8;
      --muted: #1e2145;
      --muted-fg: #8a90b8;
      --accent: #5b7bf9;
      --accent-fg: #ffffff;
      --border: #2a2e52;
    }

    /* ===== BASE ===== */
    html { 
      font-size: 16px; 
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sans);
      background: var(--bg);
      color: var(--fg);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    section {
      scroll-margin-top: 90px;
    }
    a { 
      text-decoration: none; 
      color: inherit; 
    }
    img { 
      display: block; 
      max-width: 100%; 
    }
    ul { 
      list-style: none; 
    }

    /* ===== MOBILE SMOOTH SCROLL ===== */
    @media (max-width: 768px) {
      html {
        scroll-behavior: smooth;
      }
    }

    /* ===== UTILITY ===== */
    .container { 
      max-width: 72rem; 
      margin: 0 auto; 
      padding: 0 1.5rem; }
    .sr-only { 
      position: absolute; 
      width: 1px; 
      height: 1px; 
      padding: 0; 
      margin: -1px; 
      overflow: hidden; 
      clip: rect(0,0,0,0); 
      white-space: nowrap; 
      border: 0; 
    }

    /* ===== HEADER ===== */
    .header {
      position: fixed; 
      top: 0; 
      left: 0; 
      right: 0; 
      z-index: 50;
      background: color-mix(in srgb, var(--bg) 80%, transparent);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }
    .header-inner {
      max-width: 72rem; 
      margin: 0 auto; 
      padding: 1rem 1.5rem;
      display: flex; 
      align-items: center; 
      justify-content: space-between;
    }
    .header-brand { display: flex; flex-direction: column; }
    .header-name { font-size: 1rem; font-weight: 600; letter-spacing: -0.01em; color: var(--fg); }
    .header-title { font-size: 0.75rem; color: var(--muted-fg); }
    .desktop-nav { display: flex; align-items: center; gap: 2rem; }
    .desktop-nav a { font-size: 0.875rem; color: var(--muted-fg); transition: color 0.2s; }
    .desktop-nav a:hover { color: var(--fg); }

    .theme-toggle {
      position: relative; display: flex; align-items: center; justify-content: center;
      width: 2.25rem; height: 2.25rem; border-radius: var(--radius);
      border: 1px solid var(--border); background: transparent; cursor: pointer;
      color: var(--fg); transition: background 0.2s;
    }
    .theme-toggle:hover { background: var(--secondary); }
    .theme-toggle svg { width: 1rem; height: 1rem; }
    .theme-toggle .icon-sun { display: block; }
    .theme-toggle .icon-moon { display: none; }
    html.dark .theme-toggle .icon-sun { display: none; }
    html.dark .theme-toggle .icon-moon { display: block; }

    .mobile-controls { display: none; align-items: center; gap: 0.75rem; }
    .hamburger {
      display: flex; align-items: center; justify-content: center;
      background: none; border: none; cursor: pointer; color: var(--fg);
      width: 2.25rem; height: 2.25rem;
    }
    .hamburger svg { width: 1.25rem; height: 1.25rem; }
    .hamburger .icon-x { display: none; }
    .hamburger.open .icon-menu { display: none; }
    .hamburger.open .icon-x { display: block; }

    .mobile-menu {
      display: none; border-top: 1px solid var(--border);
      background: var(--bg); padding: 1rem 1.5rem;
    }
    .mobile-menu.open { display: block; }
    .mobile-menu nav { display: flex; flex-direction: column; gap: 1rem; }
    .mobile-menu a { font-size: 0.875rem; color: var(--muted-fg); transition: color 0.2s; }
    .mobile-menu a:hover { color: var(--fg); }

    @media (max-width: 767px) {
      .desktop-nav { display: none; }
      .mobile-controls { display: flex; }
    }

    /* ===== HERO ===== */
    .hero {
      min-height: 90vh; display: flex; flex-direction: column;
      justify-content: center; padding: 6rem 1.5rem 0;
    }
    .hero-inner { max-width: 72rem; margin: 0 auto; width: 100%; }
    .hero-content { display: flex; align-items: center; justify-content: space-between; gap: 3rem; }
    .hero-text { flex: 1; }
    .hero-label { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--accent); margin-bottom: 1rem; }
    .hero-heading {
      font-family: var(--font-serif); font-size: clamp(2rem, 5vw, 3.75rem);
      font-weight: 500; line-height: 1.15; letter-spacing: -0.02em;
      color: var(--fg); max-width: 40rem; text-wrap: balance;
    }
    .hero-description { margin-top: 1.5rem; max-width: 36rem; font-size: 1rem; line-height: 1.7; color: var(--muted-fg); }
    .hero-actions { margin-top: 2.5rem; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
    .btn-primary {
      display: inline-flex; align-items: center; gap: 0.5rem;
      padding: 0.75rem 1.5rem; border-radius: var(--radius);
      background: var(--primary); color: var(--primary-fg);
      font-size: 0.875rem; font-weight: 500; border: none; cursor: pointer;
      transition: opacity 0.2s;
    }
    .btn-primary:hover { opacity: 0.9; }
    .btn-outline {
      display: inline-flex; 
      align-items: center; 
      gap: 0.5rem;
      padding: 0.75rem 1.5rem; 
      border-radius: var(--radius);
      border: 1px solid var(--border); 
      background: transparent;
      color: var(--fg); 
      font-size: 0.875rem; 
      font-weight: 500;
      cursor: pointer; 
      transition: background 0.2s;
    }
    .btn-outline:hover { background: var(--secondary); }

    .hero-photo { position: relative; flex-shrink: 0; }
    .hero-photo-frame {
      width: 16rem; 
      height: 16rem; 
      border-radius: 1rem; 
      overflow: hidden;
      border: 2px solid color-mix(in srgb, var(--accent) 30%, transparent);
      box-shadow: 0 10px 25px color-mix(in srgb, var(--accent) 10%, transparent);
    }
    .hero-photo-frame img { 
        width: 100%; 
        height: 100%; 
        object-fit: cover; }
    .hero-photo-glow-1 {
      position: absolute; bottom: -0.75rem; right: -0.75rem;
      width: 3rem; height: 3rem; border-radius: 0.5rem;
      background: color-mix(in srgb, var(--accent) 20%, transparent);
      filter: blur(16px);
    }
    .hero-photo-glow-2 {
      position: absolute; top: -0.75rem; left: -0.75rem;
      width: 4rem; height: 4rem; border-radius: 50%;
      background: color-mix(in srgb, var(--primary) 10%, transparent);
      filter: blur(16px);
    }

    .hero-scroll { margin-top: 4rem; display: flex; align-items: center; gap: 0.5rem; color: var(--muted-fg); }
    .hero-scroll svg { width: 1rem; height: 1rem; animation: bounce 1.5s infinite; }
    .hero-scroll span { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; }

    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(4px); }
    }

    @media (max-width: 767px) {
      .hero-content { flex-direction: column-reverse; align-items: flex-start; }
      .hero-photo-frame { width: 12rem; height: 12rem; }
    }

    /* ===== SECTION SHARED ===== */
    .section { padding: 6rem 1.5rem; }
    .section-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--accent); margin-bottom: 0.5rem; }
    .section-heading {
      font-family: var(--font-serif); font-size: clamp(1.875rem, 3vw, 2.5rem);
      font-weight: 500; color: var(--fg);
    }
    .section-header { margin-bottom: 3rem; }

    /* ===== SELECTED WORK ===== */
    .work-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
    @media (min-width: 768px) { .work-grid { grid-template-columns: 1fr 1fr; } }
    .work-card {
      border-radius: var(--radius); border: 1px solid var(--border);
      background: var(--card); overflow: hidden; cursor: pointer;
      transition: box-shadow 0.3s, border-color 0.3s;
    }
    .work-card:hover {
      box-shadow: 0 10px 30px rgba(0,0,0,0.12);
      border-color: color-mix(in srgb, var(--accent) 40%, transparent);
    }
    .work-card-image {
      aspect-ratio: 4/3; overflow: hidden; background: var(--secondary);
    }
    .work-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
    .work-card:hover .work-card-image img { transform: scale(1.05); }
    .work-card-body { padding: 1.5rem; }
    .work-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
    .work-card-title { font-size: 1.125rem; font-weight: 600; color: var(--card-fg); }
    .work-card-top svg {
      width: 1.25rem; height: 1.25rem; flex-shrink: 0;
      color: var(--muted-fg); transition: transform 0.2s;
    }
    .work-card:hover .work-card-top svg { transform: translate(2px, -2px); }
    .work-card-desc { margin-top: 0.5rem; font-size: 0.875rem; line-height: 1.6; color: var(--muted-fg); }
    .work-card-tags { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
    .tag {
      padding: 0.25rem 0.75rem; border-radius: 9999px;
      background: var(--secondary); font-size: 0.75rem;
      font-weight: 500; color: var(--secondary-fg);
    }

    /* ===== EXPERIENCE ===== */
    .exp-list { display: flex; flex-direction: column; }
    .exp-item {
      display: grid; gap: 1rem; padding: 2rem 0;
      border-top: 1px solid var(--border);
      grid-template-columns: 1fr;
    }
    @media (min-width: 768px) { .exp-item { grid-template-columns: 12.5rem 1fr; gap: 3rem; } }
    .exp-period { font-size: 0.875rem; color: var(--muted-fg); }
    .exp-role-line { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
    .exp-role { font-size: 1rem; font-weight: 600; color: var(--fg); }
    .exp-dot { color: var(--muted-fg); }
    .exp-company {
      display: inline-flex; align-items: center; gap: 0.25rem;
      font-size: 1rem; font-weight: 500; color: var(--fg); transition: color 0.2s;
    }
    .exp-company:hover { color: var(--accent); }
    .exp-company svg { width: 0.875rem; height: 0.875rem; }
    .exp-desc { margin-top: 0.5rem; max-width: 40rem; font-size: 0.875rem; line-height: 1.6; color: var(--muted-fg); }
    .exp-skills { margin-top: 0.75rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }

    /* ===== SKILLS ===== */
    .skills-section { background: color-mix(in srgb, var(--secondary) 50%, transparent); }
    .skills-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
    @media (min-width: 640px) { .skills-grid { grid-template-columns: 1fr 1fr; } }
    @media (min-width: 1024px) { .skills-grid { grid-template-columns: repeat(4, 1fr); } }
    .skill-card {
      border-radius: var(--radius); border: 1px solid var(--border);
      background: var(--card); padding: 1.5rem;
    }
    .skill-card-title {
      font-size: 0.875rem; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.05em; color: var(--fg); margin-bottom: 1rem;
    }
    .skill-list { display: flex; flex-direction: column; gap: 0.75rem; }
    .skill-item { display: flex; align-items: center; gap: 0.75rem; font-size: 0.875rem; color: var(--muted-fg); }
    .skill-dot {
      width: 0.375rem; height: 0.375rem; border-radius: 50%;
      background: var(--accent); flex-shrink: 0;
    }

    /* ===== CONTACT ===== */
    .contact-grid { display: grid; gap: 3rem; grid-template-columns: 1fr; }
    @media (min-width: 768px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
    .contact-heading {
      font-family: var(--font-serif); font-size: clamp(1.875rem, 3vw, 2.5rem);
      font-weight: 500; color: var(--fg); text-wrap: balance;
    }
    .contact-desc { margin-top: 1rem; max-width: 28rem; font-size: 1rem; line-height: 1.7; color: var(--muted-fg); }
    .contact-cta { margin-top: 1.5rem; }
    .contact-cta .btn-primary svg { width: 1rem; height: 1rem; }
    .socials-title {
      font-size: 0.875rem; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.05em; color: var(--fg); margin-bottom: 1.5rem;
    }
    .social-link {
      display: flex; align-items: center; justify-content: space-between;
      padding: 1rem 0; border-top: 1px solid var(--border);
      color: var(--muted-fg); transition: color 0.2s;
    }
    .social-link:hover { color: var(--fg); }
    .social-link-left { display: flex; align-items: center; gap: 0.75rem; }
    .social-link-left svg { width: 1.25rem; height: 1.25rem; }
    .social-link-left span { font-size: 0.875rem; font-weight: 500; }
    .social-link .arrow-icon { width: 1rem; height: 1rem; transition: transform 0.2s; }
    .social-link:hover .arrow-icon { transform: translate(2px, -2px); }
    .social-link-border-end { border-top: 1px solid var(--border); }

    /* ===== FOOTER ===== */
    .footer { border-top: 1px solid var(--border); padding: 2rem 1.5rem; }
    .footer-inner {
      max-width: 72rem; margin: 0 auto;
      display: flex; flex-direction: column; align-items: center;
      justify-content: space-between; gap: 1rem;
    }
    @media (min-width: 640px) { .footer-inner { flex-direction: row; } }
    .footer-copy { font-size: 0.75rem; color: var(--muted-fg); }
    .footer-links { display: flex; align-items: center; gap: 1.5rem; }
    .footer-links a { font-size: 0.75rem; color: var(--muted-fg); transition: color 0.2s; }
    .footer-links a:hover { color: var(--fg); }