/* Maros Zeman portfolio — dependency-free, responsive and accessible */
:root {
  --bg: #07111f;
  --bg-elevated: #0b1728;
  --surface: rgba(13, 29, 49, 0.78);
  --surface-solid: #0e1c30;
  --surface-muted: #0a1525;
  --text: #eef5ff;
  --text-muted: #a8b6c9;
  --line: rgba(172, 197, 226, 0.16);
  --accent: #55e6c1;
  --accent-2: #63a7ff;
  --accent-3: #b78cff;
  --shadow: 0 24px 70px rgba(0,0,0,.26);
  --radius: 24px;
  --radius-sm: 14px;
  --container: 1180px;
}

html[data-theme="light"] {
  --bg: #f5f8fc;
  --bg-elevated: #ffffff;
  --surface: rgba(255,255,255,.88);
  --surface-solid: #ffffff;
  --surface-muted: #edf3f9;
  --text: #102034;
  --text-muted: #53657b;
  --line: rgba(42, 69, 100, 0.14);
  --shadow: 0 24px 70px rgba(41, 66, 92, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgba(99,167,255,.14), transparent 29rem),
    radial-gradient(circle at 90% 12%, rgba(85,230,193,.10), transparent 28rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, textarea { font: inherit; }
button { color: inherit; }
::selection { background: rgba(85,230,193,.28); }

.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; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 2000; background: var(--accent); color: #041019; padding: .65rem .9rem; border-radius: 8px; font-weight: 800; }
.skip-link:focus { top: 1rem; }
.page-noise { position: fixed; inset: 0; pointer-events: none; opacity: .025; z-index: -1; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E"); }
.container { width: min(var(--container), calc(100% - 2rem)); margin-inline: auto; }
.section { padding: 7rem 0; }
.section-muted { background: linear-gradient(180deg, rgba(255,255,255,.018), rgba(255,255,255,.035)); border-block: 1px solid var(--line); }
.eyebrow { margin: 0 0 .75rem; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.gradient-text { background: linear-gradient(100deg, var(--accent), var(--accent-2) 54%, var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -.035em; margin-top: 0; }
h1 { font-size: clamp(3rem, 7.3vw, 6.8rem); max-width: 12ch; margin-bottom: 1.5rem; }
h2 { font-size: clamp(2.15rem, 4.3vw, 4rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; }
p { color: var(--text-muted); }

.site-header { position: sticky; top: 0; z-index: 1000; background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid transparent; backdrop-filter: blur(18px); transition: border-color .2s ease, box-shadow .2s ease; }
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 12px 28px rgba(0,0,0,.08); }
.nav-wrap { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .8rem; text-decoration: none; }
.brand span { display: grid; line-height: 1.15; }
.brand strong { font-size: .98rem; }
.brand small { color: var(--text-muted); font-size: .72rem; margin-top: .22rem; }
.desktop-nav { display: flex; gap: 1.6rem; }
.desktop-nav a, .mobile-nav a { text-decoration: none; color: var(--text-muted); font-size: .9rem; font-weight: 700; }
.desktop-nav a:hover, .desktop-nav a:focus-visible, .mobile-nav a:hover { color: var(--text); }
.nav-actions { display: flex; gap: .5rem; }
.icon-button, .menu-button { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); display: grid; place-items: center; cursor: pointer; }
.menu-button { display: none; padding: 10px; }
.menu-button > span:not(.sr-only) { width: 18px; height: 2px; background: currentColor; margin: 2px 0; display: block; }
.mobile-nav { padding: .3rem 1rem 1rem; border-top: 1px solid var(--line); }
.mobile-nav a { display: block; padding: .75rem 0; }

.hero { padding-top: 7.5rem; min-height: calc(100vh - 78px); display: grid; align-items: center; }
.hero-grid { display: grid; grid-template-columns: 1.18fr .82fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; }
.hero-lead { max-width: 67ch; font-size: clamp(1.05rem, 2vw, 1.28rem); }
.hero-actions, .about-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 2rem 0; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: .8rem 1.15rem; border-radius: 12px; border: 1px solid transparent; text-decoration: none; font-weight: 800; cursor: pointer; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { background: linear-gradient(110deg, var(--accent), #63d9ff); color: #041019; box-shadow: 0 14px 36px rgba(85,230,193,.18); }
.button.secondary { border-color: var(--line); background: var(--surface); }
.button.ghost { border-color: transparent; color: var(--text-muted); }
.hero-meta { display: flex; flex-wrap: wrap; gap: .65rem 1.2rem; color: var(--text-muted); font-size: .82rem; }
.hero-meta span { display: flex; align-items: center; gap: .45rem; }
.hero-meta span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--accent-2); }
.hero-visual { position: relative; }
.hero-visual > img { width: 100%; filter: drop-shadow(0 26px 60px rgba(0,0,0,.28)); }
.availability-card { position: absolute; left: 4%; right: 4%; bottom: -1.6rem; display: flex; align-items: center; gap: .8rem; padding: .9rem 1rem; border: 1px solid var(--line); background: color-mix(in srgb, var(--surface-solid) 88%, transparent); border-radius: 16px; box-shadow: var(--shadow); backdrop-filter: blur(16px); }
.availability-card div { display: grid; }
.availability-card small { color: var(--text-muted); }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 7px rgba(85,230,193,.1); }

.impact-strip { border-block: 1px solid var(--line); background: var(--surface-muted); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 2rem clamp(1rem, 3vw, 2.2rem); border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: clamp(1.8rem, 3vw, 2.7rem); letter-spacing: -.05em; line-height: 1; }
.stat span { display: block; margin-top: .65rem; color: var(--text-muted); font-size: .86rem; }

.section-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 2rem; margin-bottom: 3rem; }
.section-heading > p { max-width: 52ch; justify-self: end; }
.section-heading.stacked { display: block; margin-bottom: 0; }
.section-heading.stacked p { max-width: 55ch; }
.card-grid { display: grid; gap: 1rem; }
.services-grid { grid-template-columns: repeat(3, 1fr); }
.service-card, .portfolio-card, .engagement-card, .expertise-group { border: 1px solid var(--line); background: linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--surface-solid) 90%, transparent)); border-radius: var(--radius); box-shadow: 0 20px 55px rgba(0,0,0,.08); }
.service-card { padding: 1.45rem; min-height: 260px; display: flex; flex-direction: column; }
.service-card .icon { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; display: grid; place-items: center; color: var(--accent); background: rgba(85,230,193,.06); font-weight: 900; }
.service-card h3 { margin: 2rem 0 .7rem; }
.service-card p { margin: 0; }
.service-card .service-tag { margin-top: auto; padding-top: 1.5rem; color: var(--text); font-size: .78rem; font-weight: 800; }

.filter-bar { display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 1.5rem; }
.filter-button { border: 1px solid var(--line); background: transparent; color: var(--text-muted); border-radius: 999px; padding: .55rem .85rem; cursor: pointer; font-weight: 800; font-size: .78rem; }
.filter-button[aria-pressed="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }
.portfolio-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.portfolio-card { overflow: hidden; transition: transform .2s ease, border-color .2s ease; }
.portfolio-card:hover { transform: translateY(-4px); border-color: rgba(85,230,193,.35); }
.portfolio-visual { min-height: 210px; padding: 1.25rem; display: flex; align-items: flex-end; background: radial-gradient(circle at 90% 0%, var(--card-accent, rgba(85,230,193,.22)), transparent 45%), linear-gradient(150deg, #0d1a2b, #0c2331); }
html[data-theme="light"] .portfolio-visual { background: radial-gradient(circle at 90% 0%, var(--card-accent, rgba(85,230,193,.22)), transparent 45%), linear-gradient(150deg, #dce9f5, #edf7f4); }
.portfolio-diagram { width: 100%; display: grid; grid-template-columns: repeat(3, 1fr); gap: .55rem; align-items: end; }
.portfolio-diagram span { display: block; height: var(--h); border: 1px solid rgba(255,255,255,.16); background: linear-gradient(180deg, rgba(255,255,255,.12), rgba(255,255,255,.03)); border-radius: 10px 10px 4px 4px; }
html[data-theme="light"] .portfolio-diagram span { border-color: rgba(16,32,52,.11); background: rgba(255,255,255,.42); }
.portfolio-body { padding: 1.45rem; }
.portfolio-topline { display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.portfolio-category { color: var(--accent); font-size: .74rem; font-weight: 900; text-transform: uppercase; letter-spacing: .11em; }
.portfolio-period { color: var(--text-muted); font-size: .78rem; }
.portfolio-body h3 { margin: .9rem 0 .6rem; font-size: 1.55rem; }
.portfolio-outcome { color: var(--text); font-weight: 750; }
.portfolio-metrics { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.metric-chip, .skill-chip, .certification { padding: .45rem .62rem; border: 1px solid var(--line); background: rgba(255,255,255,.025); border-radius: 999px; font-size: .72rem; color: var(--text-muted); }
.portfolio-card[hidden] { display: none; }

.approach-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 7vw, 7rem); }
.text-link { text-decoration: none; color: var(--text); font-weight: 800; }
.process-list { list-style: none; padding: 0; margin: 0; counter-reset: process; }
.process-item { counter-increment: process; display: grid; grid-template-columns: 58px 1fr; gap: 1rem; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.process-item::before { content: "0" counter(process); color: var(--accent); font-size: .78rem; font-weight: 900; letter-spacing: .12em; padding-top: .35rem; }
.process-item h3 { margin-bottom: .45rem; }
.process-item p { margin: 0; }

.timeline { position: relative; max-width: 980px; margin-inline: auto; }
.timeline::before { content: ""; position: absolute; left: 155px; top: .7rem; bottom: .7rem; width: 1px; background: var(--line); }
.timeline-item { display: grid; grid-template-columns: 135px 1fr; gap: 3rem; padding: 0 0 3rem; position: relative; }
.timeline-item::after { content: ""; position: absolute; left: 150px; top: .45rem; width: 11px; height: 11px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 7px color-mix(in srgb, var(--accent) 12%, transparent); }
.timeline-period { color: var(--text-muted); font-size: .8rem; font-weight: 800; padding-top: .1rem; }
.timeline-content h3 { margin-bottom: .2rem; }
.timeline-role { color: var(--accent-2); font-size: .9rem; font-weight: 800; margin-top: 0; }
.timeline-content ul { padding-left: 1rem; color: var(--text-muted); }
.timeline-content li + li { margin-top: .45rem; }

.expertise-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 7vw, 6rem); align-items: start; }
.certifications { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.8rem; }
.expertise-groups { display: grid; gap: .8rem; }
.expertise-group { padding: 1.2rem 1.3rem; }
.expertise-group h3 { margin-bottom: .8rem; }
.skill-list { display: flex; flex-wrap: wrap; gap: .45rem; }

.engagement-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.engagement-card { padding: 1.35rem; display: flex; flex-direction: column; min-height: 285px; }
.engagement-card .duration { color: var(--accent); font-size: .76rem; font-weight: 900; text-transform: uppercase; letter-spacing: .12em; }
.engagement-card h3 { margin: 1rem 0 .6rem; }
.engagement-card ul { padding-left: 1.1rem; color: var(--text-muted); font-size: .9rem; }
.engagement-card .best-for { margin-top: auto; border-top: 1px solid var(--line); padding-top: 1rem; font-size: .78rem; color: var(--text); font-weight: 800; }

.about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 7vw, 6rem); align-items: center; }
.about-visual { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-muted); padding: 1rem; }
.about-copy p { max-width: 65ch; }
.contact-section { padding-top: 3rem; }
.contact-card { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 7vw, 6rem); border: 1px solid var(--line); background: linear-gradient(135deg, rgba(99,167,255,.1), rgba(85,230,193,.06)), var(--surface-solid); padding: clamp(1.4rem, 4vw, 3.5rem); border-radius: 30px; box-shadow: var(--shadow); }
.contact-links { display: grid; gap: .5rem; margin-top: 2rem; }
.contact-links a { text-decoration: none; font-weight: 800; }
.contact-form { display: grid; gap: .9rem; }
.contact-form label { display: grid; gap: .35rem; color: var(--text-muted); font-size: .82rem; font-weight: 800; }
.contact-form input, .contact-form textarea { width: 100%; color: var(--text); background: color-mix(in srgb, var(--bg) 72%, transparent); border: 1px solid var(--line); border-radius: 10px; padding: .78rem .85rem; outline: none; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(85,230,193,.10); }
.contact-form textarea { resize: vertical; }
.form-note { margin: 0; font-size: .75rem; }
.site-footer { border-top: 1px solid var(--line); padding: 2.5rem 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1rem; align-items: start; }
.footer-grid p { margin: .3rem 0; font-size: .8rem; }
.footer-links { display: flex; gap: 1rem; justify-content: flex-end; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: .82rem; font-weight: 800; }
.copyright { grid-column: 1 / -1; border-top: 1px solid var(--line); padding-top: 1rem; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .menu-button { display: grid; }
  .hero-grid, .about-grid, .contact-card, .expertise-layout, .approach-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-visual { max-width: 670px; margin-inline: auto; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .engagement-grid { grid-template-columns: repeat(2, 1fr); }
  .section-heading { grid-template-columns: 1fr; align-items: start; }
  .section-heading > p { justify-self: start; }
}

@media (max-width: 720px) {
  .section { padding: 5rem 0; }
  .hero { padding-top: 4.5rem; }
  h1 { font-size: clamp(2.8rem, 15vw, 4.6rem); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .services-grid, .portfolio-grid, .engagement-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 4px; }
  .timeline-item { grid-template-columns: 1fr; gap: .3rem; padding-left: 2rem; }
  .timeline-item::after { left: -1px; }
  .timeline-period { padding: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .hero-visual, .filter-bar, .contact-form, .site-footer, .button { display: none !important; }
  body { background: #fff; color: #111; }
  p { color: #333; }
  .section, .hero { padding: 1.5rem 0; }
  .portfolio-card, .service-card, .engagement-card, .expertise-group { break-inside: avoid; box-shadow: none; }
}