:root {
    --cyan: #00f5ff;
    --cyan-dim: #00b4c8;
    --cyan-dark: #003d47;
    --bg: #020c10;
    --bg2: #040f14;
    --bg3: #071820;
    --panel: rgba(0,245,255,0.04);
    --border: rgba(0,245,255,0.18);
    --border-bright: rgba(0,245,255,0.5);
    --text: #c8eef2;
    --text-dim: #8ecfdb;
    --red: #ff3c5a;
    --amber: #ffb700;
    --green: #00ff88;
    --font-mono: 'Space Mono', monospace;
    --font-display: 'Chakra Petch', sans-serif;
    --font-body: 'Exo 2', sans-serif;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px;
    overflow-x: hidden;
    cursor: crosshair;
  }

  /* HVĚZDIČKYY */
  #starfield {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background:
      radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,80,120,0.35) 0%, transparent 70%),
      radial-gradient(ellipse 40% 30% at 80% 20%, rgba(0,200,255,0.08) 0%, transparent 60%),
      var(--bg);
  }
  #starfield canvas { position: absolute; inset: 0; }

  /* OVERLAY HUD MŘŽKY */
  #hud-grid {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background-image:
      linear-gradient(rgba(0,245,255,0.022) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,245,255,0.022) 1px, transparent 1px),
      linear-gradient(135deg, transparent 49.5%, rgba(0,245,255,0.018) 49.5%, rgba(0,245,255,0.018) 50.5%, transparent 50.5%);
    background-size: 60px 60px, 60px 60px, 120px 120px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, rgba(0,0,0,0.6) 0%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, rgba(0,0,0,0.6) 0%, transparent 100%);
  }

  /* HOLO-LINKY OVERLAY */
  body::after {
    content: '';
    position: fixed; inset: 0; z-index: 9999; pointer-events: none;
    background: repeating-linear-gradient(
      0deg, transparent, transparent 2px,
      rgba(0,0,0,0.07) 2px, rgba(0,0,0,0.07) 4px
    );
  }

  ::-webkit-scrollbar { width: 6px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--cyan-dark); border-radius: 3px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--cyan-dim); }

  /* NAV */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 3rem; height: 56px;
    background: rgba(2,12,16,0.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
  }
  .nav-logo {
    font-family: var(--font-display);
    font-size: 0.82rem;
    letter-spacing: 0.25em;
    color: var(--cyan);
    text-decoration: none;
    text-transform: uppercase;
  }
  .nav-logo span { color: var(--text-dim); }
  .nav-links { display: flex; gap: 2.5rem; list-style: none; }
  .nav-links a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    text-decoration: none;
    text-transform: uppercase;
    transition: color 0.2s;
    position: relative;
  }
  .nav-links a::before { content: '> '; color: var(--cyan); opacity: 0; transition: opacity 0.2s; }
  .nav-links a:hover { color: var(--cyan); }
  .nav-links a:hover::before { opacity: 1; }
  .nav-status {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--green);
    letter-spacing: 0.1em;
  }
  .nav-status::before { content: '● '; animation: blink 1.8s infinite; }

  @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }

  section { position: relative; z-index: 1; }

  /* HERO */
  #hero {
    min-height: 100vh;
    display: grid; place-items: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
  }
  .hero-inner { max-width: 920px; width: 100%; position: relative; }

  .hero-tag {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.3em;
    color: var(--cyan-dim);
    margin-bottom: 1.2rem;
    opacity: 0;
    animation: fadeUp 0.6s 0.3s forwards;
  }
  .hero-tag::before { content: '['; color: var(--border-bright); }
  .hero-tag::after  { content: ']'; color: var(--border-bright); }

  .hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 7.5vw, 6.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: 0.04em;
    color: #fff;
    text-transform: uppercase;
    opacity: 0;
    animation: fadeUp 0.7s 0.5s forwards;
    position: relative;
    display: inline-block;
  }
  .hero-name .accent { color: var(--cyan); }
  .hero-name .sub-role {
    display: block;
    font-size: 0.42em;
    letter-spacing: 0.22em;
    color: #9dd8e8;
    font-weight: 400;
    margin-bottom: 0.3em;
  }

  .hero-subtitle {
    font-family: var(--font-mono);
    font-size: clamp(0.82rem, 1.8vw, 1rem);
    color: var(--text-dim);
    margin-top: 1.6rem;
    line-height: 1.8;
    max-width: 540px;
    opacity: 0;
    animation: fadeUp 0.7s 0.8s forwards;
  }
  .hero-subtitle .hl { color: var(--cyan); }

  .hero-cta {
    display: flex; gap: 1.2rem; flex-wrap: wrap;
    margin-top: 2.8rem;
    opacity: 0;
    animation: fadeUp 0.7s 1.1s forwards;
  }
  .btn {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    text-decoration: none;
    text-transform: uppercase;
    padding: 0.75rem 1.9rem;
    border: 1px solid var(--cyan);
    color: var(--cyan);
    background: transparent;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  }
  .btn:hover { background: var(--cyan); color: var(--bg); box-shadow: 0 0 32px rgba(0,245,255,0.38); }
  .btn.btn-ghost { border-color: var(--border); color: var(--text-dim); }
  .btn.btn-ghost:hover { background: var(--panel); color: var(--text); box-shadow: none; }
  .btn.btn-cv {
    border-color: var(--amber);
    color: var(--amber);
  }
  .btn.btn-cv:hover {
    background: var(--amber);
    color: var(--bg);
    box-shadow: 0 0 28px rgba(255,183,0,0.35);
  }

  .hero-metrics {
    display: flex; gap: 3rem; flex-wrap: wrap;
    margin-top: 3.2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    opacity: 0;
    animation: fadeUp 0.7s 1.4s forwards;
  }
  .metric-val {
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--cyan);
    line-height: 1;
  }
  .metric-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    margin-top: 0.25rem;
    text-transform: uppercase;
  }

  /* ORBITY */
  .hud-ring {
    position: absolute; border-radius: 50%;
    pointer-events: none;
  }
  .hud-ring.r1 { width: 340px; height: 340px; top: -60px; right: -120px;
    border: 1px solid rgba(0,245,255,0.06); }
  .hud-ring.r2 { width: 220px; height: 220px; top: -10px; right: -70px;
    border: 1px solid rgba(0,245,255,0.11);
    animation: spin 20s linear infinite; }
  .hud-ring.r3 { width: 130px; height: 130px; top: 35px; right: -25px;
    border: 1px dashed rgba(0,245,255,0.2);
    animation: spin 12s linear infinite reverse; }
  @keyframes spin { to { transform: rotate(360deg); } }
  @keyframes fadeUp {
    from { opacity:0; transform: translateY(22px); }
    to   { opacity:1; transform: translateY(0); }
  }
  @keyframes fadeIn { from{opacity:0} to{opacity:1} }

  /* POZADÍ S DIAGONÁLNÍ MŘÍŽKOU */
  .section-wrap { position: relative; }

  /* zlehka mřížka z teček v každý sekci */
  section::before {
    content: '';
    position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background-image:
      radial-gradient(circle, rgba(0,245,255,0.07) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.4) 20%, rgba(0,0,0,0.4) 80%, transparent 100%);
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.4) 20%, rgba(0,0,0,0.4) 80%, transparent 100%);
  }
  section > * { position: relative; z-index: 1; }

  /* HEADER SEKCÍ */
  .section-header {
    display: flex; align-items: baseline; gap: 1.5rem;
    margin-bottom: 4rem;
    position: relative;
  }
  /* malý rohový ohraničení u čísla v každý sekci */
  .section-header::before {
    content: '';
    position: absolute; left: -1.5rem; top: 50%;
    transform: translateY(-50%);
    width: 8px; height: 8px;
    border-top: 1px solid var(--cyan);
    border-left: 1px solid var(--cyan);
    opacity: 0.6;
  }

  /* ŠIKMÝ PRUH na panelech */
  .project-card, .system-block, .edu-card, .exp-card {
    position: relative; overflow: hidden;
  }
  .project-card::after, .system-block::after, .edu-card::after {
    content: '';
    position: absolute; top: -30px; right: -30px;
    width: 80px; height: 80px; pointer-events: none;
    background: repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 4px,
      rgba(0,245,255,0.04) 4px,
      rgba(0,245,255,0.04) 5px
    );
  }

  /* ROHOVÝ OHRANIČENÍ na kartách */
  .project-card::before {
    content: '';
    position: absolute; bottom: 6px; left: 6px;
    width: 10px; height: 10px; pointer-events: none;
    border-bottom: 1px solid rgba(0,245,255,0.25);
    border-left: 1px solid rgba(0,245,255,0.25);
  }

  /* DIAGONAL ACCENT LINE on hero */
  #hero::before {
    content: '';
    position: absolute; z-index: 0; pointer-events: none;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
      linear-gradient(135deg, transparent 60%, rgba(0,245,255,0.015) 60%, rgba(0,245,255,0.015) 61%, transparent 61%),
      linear-gradient(135deg, transparent 65%, rgba(0,245,255,0.02) 65%, rgba(0,245,255,0.02) 66%, transparent 66%),
      radial-gradient(circle at 50% 50%, transparent 0%, rgba(0,245,255,0.015) 100%);
    mask-image: none;
    -webkit-mask-image: none;
  }

  /* override section::before na hero — žádný tečky */
  #hero::before { background: none; }

  /* SKILL BAR — styl zkoseného zakončení */
  .stat-bar {
    height: 4px; background: var(--bg3);
    border-radius: 0;
    clip-path: polygon(0 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  }
  .stat-fill {
    border-radius: 0;
    clip-path: polygon(0 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  }

  /* TIMELINE pulzování teček */
  .exp-entry::before {
    animation: dotpulse 2.5s ease-in-out infinite;
  }
  @keyframes dotpulse {
    0%, 100% { box-shadow: 0 0 6px var(--cyan); }
    50% { box-shadow: 0 0 16px var(--cyan), 0 0 30px rgba(0,245,255,0.3); }
  }

  /* SECTION overrides */
  .section-wrap { max-width: 1100px; margin: 0 auto; padding: 7rem 2rem; }

  .section-header {
    display: flex; align-items: baseline; gap: 1.5rem;
    margin-bottom: 4rem;
  }
  .section-num {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--cyan);
    letter-spacing: 0.2em;
    white-space: nowrap;
  }
  .section-title {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2.8vw, 1.9rem);
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
  }
  .section-line {
    flex: 1; height: 1px;
    background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
    min-width: 20px;
  }

  /* O MNĚ */
  #whoami { border-top: 1px solid var(--border); }

  .whoami-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem; align-items: start;
  }
  .whoami-bio {
    font-size: 1.05rem; line-height: 1.9;
    color: #d4f0f5; font-weight: 300;
  }
  .whoami-bio p + p { margin-top: 1.2rem; }
  .whoami-bio strong { color: var(--cyan); font-weight: 600; }

  .whoami-stats { display: flex; flex-direction: column; gap: 1.5rem; }
  .stat-row { display: flex; flex-direction: column; gap: 0.4rem; }
  .stat-row-top {
    display: flex; justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.78rem; letter-spacing: 0.1em;
  }
  .stat-name { color: var(--text-dim); text-transform: uppercase; }
  .stat-pct  { color: var(--cyan); }
  .stat-bar  { height: 3px; background: var(--bg3); border-radius: 2px; overflow: hidden; }
  .stat-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--cyan-dark), var(--cyan));
    border-radius: 2px;
    transform: scaleX(0); transform-origin: left;
    transition: transform 1.3s cubic-bezier(0.16,1,0.3,1);
  }

  .stat-tags {
    display: flex; flex-wrap: wrap; gap: 0.6rem;
    margin-top: 2rem;
  }
  .tag {
    font-family: var(--font-mono);
    font-size: 0.72rem; letter-spacing: 0.12em;
    color: var(--cyan-dim);
    border: 1px solid var(--border);
    padding: 0.3rem 0.8rem;
    text-transform: uppercase;
    background: var(--panel);
    transition: border-color 0.2s, color 0.2s;
  }
  .tag:hover { border-color: var(--cyan); color: var(--cyan); }

  /* PROJEKTY */
  #deployments { border-top: 1px solid var(--border); }

  .project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 1.4rem;
  }
  .project-card {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 1.8rem;
    position: relative;
    transition: border-color 0.3s, transform 0.3s;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
    overflow: hidden;
  }
  .project-card::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(0,245,255,0.05) 0%, transparent 60%);
    opacity: 0; transition: opacity 0.3s;
  }
  .project-card:hover { border-color: var(--border-bright); transform: translateY(-4px); }
  .project-card:hover::before { opacity: 1; }

  .project-id {
    font-family: var(--font-mono);
    font-size: 0.7rem; letter-spacing: 0.2em;
    color: var(--cyan-dim); margin-bottom: 0.7rem;
    text-transform: uppercase;
  }
  .project-title {
    font-family: var(--font-display);
    font-size: 1rem; font-weight: 700;
    color: #fff; letter-spacing: 0.06em;
    text-transform: uppercase; margin-bottom: 0.8rem;
    display: block;
  }
  a.project-title-link {
    text-decoration: none;
    transition: color 0.2s;
  }
  a.project-title-link:hover { color: var(--cyan); }
  .project-desc {
    font-size: 0.95rem; line-height: 1.75;
    color: #a8dce6; font-weight: 300;
  }
  .project-tech { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.3rem; }
  .tech-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem; letter-spacing: 0.1em;
    color: var(--cyan);
    background: rgba(0,245,255,0.07);
    border: 1px solid rgba(0,245,255,0.2);
    padding: 0.2rem 0.55rem;
    text-transform: uppercase;
  }
  .project-links {
    display: flex; gap: 1rem;
    margin-top: 1.4rem; padding-top: 1.1rem;
    border-top: 1px solid var(--border);
  }
  .project-link {
    font-family: var(--font-mono);
    font-size: 0.73rem; letter-spacing: 0.1em;
    color: var(--text-dim); text-decoration: none;
    text-transform: uppercase; transition: color 0.2s;
  }
  .project-link:hover { color: var(--cyan); }
  .project-link::before { content: '→ '; }

  .project-status {
    position: absolute; top: 1rem; right: 1.3rem;
    font-family: var(--font-mono);
    font-size: 0.68rem; letter-spacing: 0.1em;
    text-transform: uppercase;
  }
  .status-active   { color: var(--green); }
  .status-wip      { color: var(--amber); }
  .status-archived { color: var(--text-dim); }
  .status-active::before   { content: '● '; animation: blink 2s infinite; }
  .status-wip::before      { content: '◐ '; }
  .status-archived::before { content: '○ '; }

  /* DOVEDNOSTI */
  #systems { border-top: 1px solid var(--border); }

  .systems-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  .system-block {
    flex: 1 1 230px;
    max-width: 280px;
    border: 1px solid var(--border);
    padding: 1.5rem;
    background: var(--panel);
    transition: border-color 0.3s;
  }
  .system-block:hover { border-color: var(--border-bright); }
  .system-icon { width: 1.7rem; height: 1.7rem; margin-bottom: 0.7rem; display: block; color: var(--text); filter: drop-shadow(0 0 6px var(--cyan)) drop-shadow(0 0 12px rgba(0,245,255,0.4)); }
  .system-name {
    font-family: var(--font-display);
    font-size: 0.85rem; font-weight: 700;
    letter-spacing: 0.12em; color: var(--cyan);
    text-transform: uppercase; margin-bottom: 0.7rem;
  }
  .system-items {
    list-style: none;
    font-family: var(--font-mono);
    font-size: 0.8rem; color: var(--text-dim);
    line-height: 1.95; letter-spacing: 0.04em;
  }
  .system-items li::before { content: '> '; color: var(--cyan-dim); }

  /* SPOJENÍ */
  #comms { border-top: 1px solid var(--border); }

  .comms-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem; align-items: start;
  }
  .comms-text {
    font-size: 1rem; line-height: 1.85;
    color: #a8dce6; font-weight: 300;
  }
  .comms-text p + p { margin-top: 1rem; }
  .comms-text strong { color: var(--text); font-weight: 600; }

  .comms-links { display: flex; flex-direction: column; gap: 0.9rem; }
  .comm-link {
    display: flex; align-items: center; gap: 1rem;
    padding: 1rem 1.2rem;
    border: 1px solid var(--border);
    background: var(--panel);
    text-decoration: none; color: var(--text-dim);
    font-family: var(--font-mono); font-size: 0.82rem;
    letter-spacing: 0.1em;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
  }
  .comm-link:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,245,255,0.05); }
  .comm-link-icon { font-size: 1.1rem; min-width: 1.3rem; text-align: center; }
  .comm-link-label { flex: 1; }
  .comm-link-arrow { color: var(--cyan); opacity: 0; transition: opacity 0.2s; }
  .comm-link:hover .comm-link-arrow { opacity: 1; }

  /* FOOTER */
  footer {
    border-top: 1px solid var(--border);
    padding: 1.8rem 2rem;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 1rem;
    position: relative; z-index: 1;
    background: rgba(2,12,16,0.6);
  }
  .footer-copy, .footer-coords {
    font-family: var(--font-mono);
    font-size: 0.7rem; letter-spacing: 0.12em;
    color: var(--text-dim); text-transform: uppercase;
  }
  .footer-coords { color: var(--border-bright); }

  /*  ROHOVÉ ZKRÁŠLENÍ */
  .corner-tl, .corner-br {
    position: fixed; width: 36px; height: 36px;
    pointer-events: none; z-index: 999;
  }
  .corner-tl { top: 64px; left: 14px;
    border-top: 1px solid var(--cyan-dim); border-left: 1px solid var(--cyan-dim); }
  .corner-br { bottom: 14px; right: 14px;
    border-bottom: 1px solid var(--cyan-dim); border-right: 1px solid var(--cyan-dim); }

  /*  SVATOZÁŘ KURZORU */
  #cursor-glow {
    position: fixed; pointer-events: none; z-index: 9998;
    width: 280px; height: 280px; border-radius: 50%;
    background: radial-gradient(circle, rgba(0,245,255,0.045) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
  }

  /* VYJETÍ ELEMENTŮ ZEZDOLA PŘI SCROLLU */
  .reveal {
    opacity: 0; transform: translateY(22px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible { opacity: 1; transform: translateY(0); }

  /* GLITCH HLAVNÍHO NADPISU */
  .glitch { position: relative; display: inline-block; }
  .glitch::before, .glitch::after {
    content: attr(data-text);
    position: absolute; inset: 0;
  }
  .glitch::before {
    color: var(--red); left: 2px;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    animation: glitch1 5s infinite steps(1);
    opacity: 0;
  }
  .glitch::after {
    color: var(--cyan); left: -2px;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    animation: glitch2 5s infinite steps(1);
    opacity: 0;
  }
  @keyframes glitch1 {
    0%,94%,100%{opacity:0}
    95%{opacity:1;clip-path:polygon(0 20%,100% 20%,100% 35%,0 35%)}
    96%{opacity:1;clip-path:polygon(0 60%,100% 60%,100% 75%,0 75%)}
    97%{opacity:0}
  }
  @keyframes glitch2 {
    0%,96%,100%{opacity:0}
    97%{opacity:1;clip-path:polygon(0 40%,100% 40%,100% 55%,0 55%)}
    98%{opacity:1;clip-path:polygon(0 5%,100% 5%,100% 20%,0 20%)}
    99%{opacity:0}
  }

  /* NAV VPRAVO */
  .nav-right { display: flex; align-items: center; gap: 1rem; }

  /* HAMBURGER */
  .hamburger {
    display: flex;
    flex-direction: column; justify-content: center; align-items: center;
    gap: 5px;
    width: 40px; height: 36px;
    background: transparent;
    border: 1px solid var(--cyan);
    color: var(--cyan);
    cursor: pointer;
    padding: 8px;
    transition: background 0.2s, box-shadow 0.2s;
    flex-shrink: 0;
    clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
  }
  .hamburger:hover {
    background: rgba(0,245,255,0.1);
    box-shadow: 0 0 14px rgba(0,245,255,0.25);
  }
  .hamburger span {
    display: block; width: 18px; height: 1.5px;
    background: var(--cyan);
    transition: transform 0.3s, opacity 0.3s, width 0.3s;
    transform-origin: center;
  }
  .hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
  .hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

  /* MOBILNÍ MENU — defaultně všude schované */
  .mobile-menu {
    position: fixed;
    top: 56px; left: 0; right: 0; bottom: 0;
    z-index: 998;
    background: rgba(2, 10, 14, 0.97);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    padding: 2rem 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16,1,0.3,1), visibility 0.3s;
    background-image:
      repeating-linear-gradient(
        0deg, transparent, transparent 2px,
        rgba(0,0,0,0.12) 2px, rgba(0,0,0,0.12) 4px
      );
  }
  .mobile-menu.open {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: translateY(0);
  }
  .mobile-menu::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  }
  .mobile-menu::after {
    content: '';
    position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
  }
  .mobile-menu-inner {
    display: flex; flex-direction: column; gap: 0; padding: 1rem 0;
  }
  .mobile-menu-label {
    font-family: var(--font-mono);
    font-size: 0.62rem; letter-spacing: 0.35em;
    color: var(--cyan-dim); padding: 0 2rem 1rem;
    text-transform: uppercase; opacity: 0.7;
  }
  .mobile-menu-label::before { content: '// '; }
  .mobile-menu ul { list-style: none; }
  .mobile-menu ul li {
    position: relative;
    border-top: 1px solid rgba(0,245,255,0.08);
    overflow: hidden;
    opacity: 0; transform: translateX(-16px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  .mobile-menu ul li:last-child { border-bottom: 1px solid rgba(0,245,255,0.08); }
  .mobile-menu ul li::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(0,245,255,0.07) 0%, transparent 80%);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  .mobile-menu ul li:hover::before { transform: translateX(0); }
  .mobile-menu.open ul li:nth-child(1) { opacity:1; transform:none; transition-delay:0.06s; }
  .mobile-menu.open ul li:nth-child(2) { opacity:1; transform:none; transition-delay:0.13s; }
  .mobile-menu.open ul li:nth-child(3) { opacity:1; transform:none; transition-delay:0.20s; }
  .mobile-menu.open ul li:nth-child(4) { opacity:1; transform:none; transition-delay:0.27s; }
  .mobile-menu.open ul li:nth-child(5) { opacity:1; transform:none; transition-delay:0.34s; }
  .mobile-menu.open ul li:nth-child(6) { opacity:1; transform:none; transition-delay:0.41s; }
  .mobile-menu.open ul li:nth-child(7) { opacity:1; transform:none; transition-delay:0.41s; }
  .mobile-menu ul a {
    display: flex; align-items: center; gap: 1rem;
    padding: 1.2rem 2rem;
    font-family: var(--font-mono);
    font-size: 1rem; letter-spacing: 0.18em;
    color: var(--text-dim); text-decoration: none;
    text-transform: uppercase;
    transition: color 0.2s;
    position: relative; z-index: 1;
  }
  .mobile-menu ul a:hover { color: var(--cyan); }
  .mobile-menu ul a .mn-num {
    font-size: 0.62rem; color: var(--cyan);
    opacity: 0.6; min-width: 2.2rem; letter-spacing: 0.1em;
  }
  .mobile-menu ul a .mn-arrow {
    margin-left: auto; color: var(--cyan);
    opacity: 0; transition: opacity 0.2s, transform 0.2s;
    transform: translateX(-6px);
  }
  .mobile-menu ul a:hover .mn-arrow { opacity: 1; transform: translateX(0); }
  .mobile-menu-status {
    margin-top: 2rem; padding: 0 2rem;
    font-family: var(--font-mono); font-size: 0.62rem;
    letter-spacing: 0.2em; color: var(--text-dim);
    display: flex; align-items: center; gap: 0.6rem;
    text-transform: uppercase;
  }
  .mobile-menu-status::before { content: '●'; color: var(--green); animation: blink 1.8s infinite; }

  /* VZDĚLÁNÍ */
  #education { border-top: 1px solid var(--border); }

  .edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.4rem;
  }
  .edu-card {
    display: flex; gap: 1.5rem; align-items: flex-start;
    border: 1px solid var(--border);
    background: var(--panel);
    padding: 1.8rem;
    transition: border-color 0.3s, transform 0.3s;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  }
  .edu-card:hover { border-color: var(--border-bright); transform: translateY(-3px); }
  .edu-icon {
    width: 1.8rem; height: 1.8rem;
    color: var(--text);
    filter: drop-shadow(0 0 6px var(--cyan)) drop-shadow(0 0 12px rgba(0,245,255,0.4));
    flex-shrink: 0;
    margin-top: 0.1rem;
  }
  .edu-label {
    font-family: var(--font-mono);
    font-size: 0.62rem; letter-spacing: 0.22em;
    color: var(--cyan-dim); margin-bottom: 0.5rem;
    text-transform: uppercase;
  }
  .edu-title {
    font-family: var(--font-display);
    font-size: 1rem; font-weight: 700;
    color: #fff; letter-spacing: 0.04em;
    margin-bottom: 0.4rem;
  }
  .edu-detail {
    font-family: var(--font-body);
    font-size: 0.9rem; color: var(--text-dim);
    margin-bottom: 0.9rem; font-weight: 300;
  }
  .edu-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.62rem; letter-spacing: 0.1em;
    color: var(--cyan);
    background: rgba(0,245,255,0.07);
    border: 1px solid rgba(0,245,255,0.2);
    padding: 0.25rem 0.7rem;
    text-transform: uppercase;
  }

  /* VOLNÝ ČAS */
  #off-duty { border-top: 1px solid var(--border); }

  .hobbies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
  }

  .hobby-card {
    border: 1px solid var(--border);
    background: var(--panel);
    padding: 1.4rem 1.5rem;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
    position: relative; overflow: hidden;
    transition: border-color 0.3s, transform 0.3s;
    display: flex; flex-direction: column; gap: 0.7rem;
  }
  .hobby-card:hover { border-color: var(--border-bright); transform: translateY(-3px); }
  .hobby-card::after {
    content: ''; position: absolute; top: -20px; right: -20px;
    width: 60px; height: 60px; pointer-events: none;
    background: repeating-linear-gradient(
      -45deg, transparent, transparent 4px,
      rgba(0,245,255,0.04) 4px, rgba(0,245,255,0.04) 5px
    );
  }

  .hobby-icon {
    width: 1.6rem; height: 1.6rem;
    color: var(--text);
    filter: drop-shadow(0 0 6px var(--cyan)) drop-shadow(0 0 12px rgba(0,245,255,0.4));
    flex-shrink: 0;
  }

  .hobby-name {
    font-family: var(--font-display);
    font-size: 0.9rem; font-weight: 700;
    color: #fff; letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .hobby-desc {
    font-family: var(--font-body);
    font-size: 0.85rem; line-height: 1.7;
    color: var(--text-dim); font-weight: 300;
  }

  @media (max-width: 600px) {
    .hobbies-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 400px) {
    .hobbies-grid { grid-template-columns: 1fr; }
  }

  /* ZKUŠENOSTI */
  #experience { border-top: 1px solid var(--border); }

  .exp-timeline {
    display: flex; flex-direction: column;
    gap: 0;
    position: relative;
    padding-left: 2rem;
  }
  /* svislá čára */
  .exp-timeline::before {
    content: '';
    position: absolute; left: 0; top: 8px; bottom: 8px; width: 1px;
    background: linear-gradient(180deg, transparent, var(--border) 10%, var(--border) 90%, transparent);
  }

  .exp-entry {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 2rem;
    padding: 0 0 3rem 2rem;
    position: relative;
  }
  .exp-entry:last-child { padding-bottom: 0; }

  /* tečky na timelině */
  .exp-entry::before {
    content: '';
    position: absolute; left: -0.3rem; top: 10px;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
  }

  .exp-meta {
    display: flex; flex-direction: column; gap: 0.4rem;
    padding-top: 0.1rem;
    text-align: right;
  }
  .exp-period {
    font-family: var(--font-mono);
    font-size: 0.68rem; letter-spacing: 0.1em;
    color: var(--cyan-dim); text-transform: uppercase;
    white-space: nowrap;
  }
  .exp-type {
    font-family: var(--font-mono);
    font-size: 0.58rem; letter-spacing: 0.15em;
    color: var(--text-dim);
    border: 1px solid var(--border);
    padding: 0.15rem 0.5rem;
    text-transform: uppercase;
    display: inline-block; align-self: flex-end;
    background: var(--panel);
  }

  .exp-card {
    border: 1px solid var(--border);
    background: var(--panel);
    padding: 1.6rem;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
    transition: border-color 0.3s;
  }
  .exp-card:hover { border-color: var(--border-bright); }

  .exp-company {
    font-family: var(--font-display);
    font-size: 1rem; font-weight: 700;
    color: #fff; letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
  }
  .exp-role {
    font-family: var(--font-mono);
    font-size: 0.72rem; letter-spacing: 0.12em;
    color: var(--cyan); text-transform: uppercase;
    margin-bottom: 0.9rem;
  }
  .exp-desc {
    font-size: 0.95rem; line-height: 1.75;
    color: var(--text-dim); font-weight: 300;
    margin-bottom: 1rem;
  }
  .exp-result {
    font-size: 0.88rem; line-height: 1.7;
    color: var(--text-dim); font-weight: 300;
    border-left: 2px solid var(--cyan-dark);
    padding-left: 0.9rem;
    margin-bottom: 1.1rem;
  }
  .exp-result-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.6rem; letter-spacing: 0.18em;
    color: var(--cyan); text-transform: uppercase;
    margin-bottom: 0.3rem;
  }
  .exp-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }

  @media (max-width: 600px) {
    .exp-entry { grid-template-columns: 1fr; gap: 0.8rem; padding-left: 1.5rem; }
    .exp-meta { text-align: left; flex-direction: row; align-items: center; flex-wrap: wrap; gap: 0.6rem; }
    .exp-type { align-self: auto; }
  }

  /* ─── DESKTOP: nav odkazy jsou viditelné, hamburger není ─── */
  @media (min-width: 1100px) {
    .hamburger { display: none !important; }
  }

  /* ─── SCROLL NAHORU ─── */
  .scroll-top {
    position: fixed; bottom: 2rem; right: 2rem;
    z-index: 2000;
    width: 42px; height: 42px;
    background: rgba(2,12,16,0.45);
    border: 1px solid var(--cyan);
    color: var(--cyan);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
    opacity: 0; pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.3s, transform 0.3s, bottom 0.25s ease, background 0.2s, box-shadow 0.2s;
    backdrop-filter: blur(8px);
  }
  .scroll-top.visible {
    opacity: 1; pointer-events: all;
    transform: translateY(0);
  }
  .scroll-top:hover {
    background: var(--cyan);
    color: var(--bg);
    box-shadow: 0 0 20px rgba(0,245,255,0.4);
  }
  
  @media (hover: none) {
    .scroll-top:hover {
      background: rgba(2,12,16,0.45);
      color: var(--cyan);
      box-shadow: none;
    }
  }

  /* ─── RESPONZIVITA ─── */
  @media (max-width: 1099px) {
    .nav-links { display: none; }
    .nav-status { display: none; }
    .hud-ring { width: 100px; height: 100px; }
    .corner-tl, .corner-br { display: none; }
    #cursor-glow { display: none; }

    .hero-inner { padding: 0 0.5rem; }
    .hero-metrics { gap: 1.5rem; }
    .metric-val { font-size: 1.3rem; }

    .whoami-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .comms-inner { grid-template-columns: 1fr; gap: 2.5rem; }

    .project-grid { grid-template-columns: 1fr; }
    .systems-grid { grid-template-columns: 1fr 1fr; }

    .section-wrap { padding: 4rem 1.2rem; }

    .hero-cta { flex-direction: column; align-items: flex-start; gap: 0.8rem; }
    .btn { width: 100%; text-align: center; justify-content: center; display: block; }

    footer { flex-direction: column; align-items: flex-start; gap: 0.5rem; padding: 1.4rem 1.2rem; }
  }

  @media (max-width: 600px) {
    nav { padding: 0 1rem; }
    .section-title { font-size: 1.1rem; }
    .systems-grid { grid-template-columns: 1fr; }
    .hero-metrics { gap: 1.2rem; }
    .section-wrap { padding: 3rem 1rem; }
    .whoami-bio { font-size: 0.95rem; }
    .project-card { padding: 1.3rem; }
    .system-block { padding: 1.2rem; }
  }