:root {
      --bg: #0d0d0f;
      --surface: #141416;
      --surface2: #1c1c1f;
      --border: #272729;
      --border-hover: #3a3a3e;
      --red: #c0392b;
      --red-dim: rgba(192,57,43,0.10);
      --red-mid: rgba(192,57,43,0.22);
      --text: #e4e4e8;
      --muted: #7a7a88;
      --heading: 'Syne', sans-serif;
      --body: 'DM Sans', sans-serif;
    }
    [data-theme="light"] {
      --bg: #f5f5f7;
      --surface: #ffffff;
      --surface2: #ebebef;
      --border: #dcdce4;
      --border-hover: #b0b0c0;
      --red: #b03020;
      --red-dim: rgba(176,48,32,0.07);
      --red-mid: rgba(176,48,32,0.14);
      --text: #18181c;
      --muted: #666678;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      background: var(--bg); color: var(--text);
      font-family: var(--body); font-size: 16px; line-height: 1.7;
      overflow-x: hidden; transition: background 0.3s, color 0.3s;
    }

    nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      display: flex; justify-content: space-between; align-items: center;
      padding: 1.1rem 3rem;
      background: var(--bg); border-bottom: 1px solid var(--border);
      transition: background 0.3s;
    }
    .nav-logo { font-family: var(--heading); font-weight: 800; font-size: 1.05rem; letter-spacing: 0.02em; color: var(--text); }
    .nav-logo span { color: var(--red); }
    .nav-right { display: flex; align-items: center; gap: 2.2rem; }
    .nav-links { display: flex; gap: 2rem; }
    .nav-links a { font-size: 0.82rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); text-decoration: none; transition: color 0.2s; }
    .nav-links a:hover { color: var(--text); }
    .nav-controls { display: flex; align-items: center; gap: 0.5rem; }
    .ctrl-btn {
      background: var(--surface2); border: 1px solid var(--border);
      border-radius: 5px; padding: 0.28rem 0.7rem;
      font-family: var(--body); font-size: 0.77rem; font-weight: 500;
      letter-spacing: 0.07em; color: var(--muted); cursor: pointer;
      transition: all 0.2s; text-transform: uppercase;
    }
    .ctrl-btn:hover { border-color: var(--border-hover); color: var(--text); }
    .ctrl-btn.active { border-color: var(--red); color: var(--red); background: var(--red-dim); }

    .wrap { max-width: 1080px; margin: 0 auto; padding: 0 3rem; }
    section { padding: 7rem 0; }
    .section-eyebrow { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--red); margin-bottom: 0.6rem; }
    h2.section-title { font-family: var(--heading); font-size: clamp(1.9rem, 3.5vw, 2.8rem); font-weight: 800; line-height: 1.1; margin-bottom: 3rem; letter-spacing: -0.5px; }

    #hero { min-height: 100vh; display: flex; align-items: center; padding-top: 5rem; }
    .hero-inner { display: grid; grid-template-columns: 1fr auto; gap: 5rem; align-items: center; width: 100%; }
    .hero-tag {
      display: inline-block; border: 1px solid var(--border);
      border-left: 2px solid var(--red); background: var(--surface);
      color: var(--muted); padding: 0.3rem 0.85rem;
      border-radius: 0 4px 4px 0; font-size: 0.8rem; font-weight: 500;
      letter-spacing: 0.04em; margin-bottom: 1.5rem;
    }
    h1 { font-family: var(--heading); font-size: clamp(2.8rem, 5.5vw, 4.5rem); font-weight: 800; line-height: 1.0; letter-spacing: -1.5px; margin-bottom: 1.2rem; }
    h1 .line2 { color: var(--red); }
    .hero-desc { font-size: 1rem; color: var(--muted); max-width: 420px; margin-bottom: 2.5rem; line-height: 1.75; }
    .hero-btns { display: flex; gap: 0.85rem; flex-wrap: wrap; }
    .btn {
      display: inline-flex; align-items: center; gap: 0.45rem;
      padding: 0.7rem 1.4rem; border-radius: 5px;
      font-size: 0.88rem; font-weight: 500; letter-spacing: 0.02em;
      text-decoration: none; transition: all 0.18s; cursor: pointer;
      border: 1px solid transparent; font-family: var(--body);
    }
    .btn-primary { background: var(--red); color: #fff; border-color: var(--red); }
    .btn-primary:hover { opacity: 0.87; transform: translateY(-1px); }
    .btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
    .btn-outline:hover { border-color: var(--border-hover); background: var(--surface2); }

    .hero-photo-wrap { position: relative; display: flex; align-items: center; justify-content: center; }
    .photo-ring {
      position: absolute; width: 294px; height: 294px; border-radius: 50%;
      border: 1.5px solid transparent;
      border-top-color: var(--red); border-right-color: var(--red);
      animation: spin 9s linear infinite; pointer-events: none;
    }
    @keyframes spin { to { transform: rotate(360deg); } }
    .hero-photo {
      width: 260px; height: 260px; border-radius: 50%;
      background: var(--surface2); border: 1px solid var(--border);
      display: flex; align-items: center; justify-content: center; overflow: hidden;
    }
    .hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center top; border-radius: 50%; }
    .photo-initials { font-family: var(--heading); font-size: 2.8rem; font-weight: 800; color: var(--border-hover); letter-spacing: -2px; }

    #about { border-top: 1px solid var(--border); }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; }
    .about-text p { color: var(--muted); margin-bottom: 1rem; }
    .info-row { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; border-bottom: 1px solid var(--border); }
    .info-row:first-child { border-top: 1px solid var(--border); }
    .info-key { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
    .info-val { font-size: 0.92rem; font-weight: 500; text-align: right; }
    .info-val a { color: var(--red); text-decoration: none; }
    .info-val a:hover { text-decoration: underline; }

    #skills { border-top: 1px solid var(--border); }
    .skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 1px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
    .skill-item { background: var(--surface); padding: 1.5rem 1rem; text-align: center; font-size: 0.88rem; font-weight: 500; transition: background 0.15s; cursor: default; }
    .skill-item:hover { background: var(--red-dim); }
    .skill-name { display: block; }
    .skill-type { display: block; font-size: 0.72rem; color: var(--muted); margin-top: 0.2rem; text-transform: uppercase; letter-spacing: 0.06em; }

    #projects { border-top: 1px solid var(--border); }
    .projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 1px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
    .project-card { background: var(--surface); padding: 2rem; transition: background 0.15s; position: relative; }
    .project-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--red); opacity: 0; transition: opacity 0.2s; }
    .project-card:hover { background: var(--surface2); }
    .project-card:hover::before { opacity: 1; }
    .project-num { font-family: var(--heading); font-size: 2.5rem; font-weight: 800; color: var(--border-hover); line-height: 1; margin-bottom: 0.8rem; }
    .project-title { font-family: var(--heading); font-size: 1.1rem; font-weight: 700; margin-bottom: 0.6rem; }
    .project-desc { font-size: 0.88rem; color: var(--muted); margin-bottom: 1.2rem; line-height: 1.65; }
    .project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.4rem; }
    .tag { background: var(--surface2); border: 1px solid var(--border); border-radius: 4px; padding: 0.15rem 0.55rem; font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
    .project-link { font-size: 0.82rem; font-weight: 500; color: var(--red); text-decoration: none; letter-spacing: 0.04em; text-transform: uppercase; border-bottom: 1px solid var(--red-mid); padding-bottom: 1px; transition: border-color 0.2s; }
    .project-link:hover { border-color: var(--red); }

    #cv { border-top: 1px solid var(--border); }
    .cv-row { display: flex; gap: 1px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
    .cv-card { flex: 1; background: var(--surface); padding: 2.5rem 2rem; display: flex; flex-direction: column; gap: 1rem; transition: background 0.15s; }
    .cv-card:hover { background: var(--surface2); }
    .cv-lang { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
    .cv-card-title { font-family: var(--heading); font-size: 1.4rem; font-weight: 700; }

    #contact { border-top: 1px solid var(--border); }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; }
    .contact-intro { color: var(--muted); margin-bottom: 2rem; }
    .contact-links { display: flex; flex-direction: column; gap: 1px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
    .contact-link { display: flex; align-items: center; gap: 1.2rem; padding: 1.1rem 1.4rem; background: var(--surface); text-decoration: none; color: var(--text); transition: background 0.15s; border-left: 2px solid transparent; }
    .contact-link:hover { background: var(--surface2); border-left-color: var(--red); }
    .cl-icon { font-size: 0.75rem; font-weight: 700; color: var(--muted); width: 22px; text-align: center; letter-spacing: 0.04em; }
    .cl-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
    .cl-value { font-size: 0.9rem; font-weight: 500; }

    footer { border-top: 1px solid var(--border); padding: 2rem 3rem; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--muted); }
    footer .red { color: var(--red); }

    .fi { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }
    .fi.in { opacity: 1; transform: none; }

    @media (max-width: 820px) {
      nav { padding: 1rem 1.4rem; }
      .nav-links { display: none; }
      .wrap { padding: 0 1.4rem; }
      .hero-inner, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
      .hero-photo-wrap { display: none; }
      .cv-row { flex-direction: column; }
    }