/* ===================================================================
   Lennart Pafel — personal site
   Bold, dark, editorial. Static. No frameworks.
   =================================================================== */

:root {
  --bg:        #0c0c0e;
  --bg-alt:    #111114;
  --surface:   #16161a;
  --line:      #26262c;
  --ink:       #f4f4f0;
  --ink-soft:  #a6a6a2;
  --ink-faint: #6c6c70;
  --accent:    #c8ff3d;   /* electric lime */
  --accent-ink:#0c0c0e;

  --maxw: 1200px;
  --pad: clamp(1.25rem, 4vw, 3rem);

  --f-display: "Space Grotesk", system-ui, sans-serif;
  --f-body: "Inter", system-ui, -apple-system, sans-serif;

  --ease: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--accent-ink); }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 999;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: 0 0 .5rem 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

/* ===================== Buttons ===================== */
.btn {
  --_bg: var(--accent);
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--_bg); color: var(--accent-ink);
  font-family: var(--f-display); font-weight: 600; font-size: .95rem;
  letter-spacing: .01em;
  padding: .85rem 1.5rem; border-radius: 100px; border: 1px solid transparent;
  cursor: pointer; transition: transform .3s var(--ease), background .3s var(--ease), color .3s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--sm { padding: .55rem 1.1rem; font-size: .85rem; }

/* ===================== Nav ===================== */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
.nav.is-stuck { border-bottom-color: var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 68px; }
.nav__brand { display: inline-flex; align-items: center; gap: .6rem; font-family: var(--f-display); font-weight: 600; }
.nav__mark {
  display: grid; place-items: center; width: 30px; height: 30px;
  background: var(--accent); color: var(--accent-ink); border-radius: 8px; font-weight: 700;
}
.nav__name { font-size: 1rem; letter-spacing: .01em; }
.nav__links { display: flex; gap: 1.6rem; }
.nav__links a { color: var(--ink-soft); font-size: .92rem; position: relative; transition: color .25s var(--ease); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -4px; height: 1px; width: 0; background: var(--accent);
  transition: width .3s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav__name { display: none; }
}

/* ===================== Hero ===================== */
.hero { padding: clamp(3rem, 8vw, 7rem) 0 clamp(2rem, 5vw, 4rem); position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60vw 40vw at 78% -5%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%),
    radial-gradient(50vw 40vw at 0% 20%, color-mix(in srgb, #4d7dff 8%, transparent), transparent 55%);
  pointer-events: none;
}
.hero__inner {
  display: grid; grid-template-columns: 1.35fr .9fr; gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.eyebrow {
  font-family: var(--f-display); text-transform: uppercase; letter-spacing: .18em;
  font-size: .78rem; color: var(--accent); margin: 0 0 1.4rem;
}
.hero__title {
  font-family: var(--f-display); font-weight: 700;
  font-size: clamp(2.6rem, 6.2vw, 5.2rem); line-height: 1.02; letter-spacing: -.02em;
  margin: 0 0 1.6rem;
}
.hero__title span { display: block; }
.hero__title em { font-style: normal; color: var(--accent); }
.hero__lead { color: var(--ink-soft); max-width: 46ch; margin: 0 0 2.2rem; font-size: 1.08rem; }
.hero__cta { display: flex; gap: .9rem; flex-wrap: wrap; margin-bottom: 3rem; }

.hero__stats {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
  border-top: 1px solid var(--line); padding-top: 1.6rem;
}
.hero__stats strong { font-family: var(--f-display); font-size: 1.5rem; display: block; }
.hero__stats span { color: var(--ink-faint); font-size: .85rem; }

.hero__portrait { position: relative; }
.portrait {
  position: relative; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 768 / 953;
  box-shadow: 0 40px 80px -40px rgba(0,0,0,.8);
}
.portrait img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(12%) contrast(1.02); }
.portrait::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, color-mix(in srgb, var(--bg) 55%, transparent));
}
.portrait__tag {
  position: absolute; bottom: 14px; left: 14px; z-index: 2;
  display: inline-flex; align-items: center; gap: .5rem;
  background: color-mix(in srgb, var(--bg) 80%, transparent); backdrop-filter: blur(6px);
  border: 1px solid var(--line); border-radius: 100px;
  padding: .45rem .9rem; font-size: .8rem; font-family: var(--f-display); color: var(--ink);
}
.portrait__tag::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 70%, transparent);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 60%, transparent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__portrait { order: -1; max-width: 340px; }
}
@media (max-width: 480px) {
  .hero__title { font-size: clamp(2rem, 9vw, 2.5rem); }
  .hero__stats { grid-template-columns: 1fr; gap: .6rem; text-align: left; }
  .hero__stats li { display: flex; align-items: baseline; gap: .6rem; }
  .hero__stats strong { font-size: 1.1rem; }
}

/* ===================== Marquee ===================== */
.marquee {
  border-block: 1px solid var(--line); overflow: hidden; padding: 1.1rem 0;
  background: var(--bg-alt);
}
.marquee__track {
  display: flex; align-items: center; gap: 2.5rem; width: max-content;
  animation: scroll 32s linear infinite;
}
.marquee__track span { font-family: var(--f-display); font-size: 1.4rem; font-weight: 500; color: var(--ink-soft); white-space: nowrap; }
.marquee__track span[aria-hidden] { color: var(--accent); }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ===================== Sections ===================== */
.section { padding: clamp(4rem, 9vw, 7.5rem) 0; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section__head { max-width: 60ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section__num {
  font-family: var(--f-display); color: var(--accent); font-size: .85rem; letter-spacing: .2em;
  margin: 0 0 1rem;
}
.section__title {
  font-family: var(--f-display); font-weight: 700; letter-spacing: -.02em;
  font-size: clamp(2rem, 4.5vw, 3.2rem); line-height: 1.05; margin: 0 0 1.2rem;
}
.section__intro { color: var(--ink-soft); font-size: 1.1rem; margin: 0; }

/* ===================== Cards ===================== */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  transition: transform .4s var(--ease), border-color .4s var(--ease), background .4s var(--ease);
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: 0;
  background: radial-gradient(40rem 20rem at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--accent) 10%, transparent), transparent 60%);
  transition: opacity .4s var(--ease); pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.card:hover::before { opacity: 1; }
.card__top { margin-bottom: 1.2rem; }
.card__idx { font-family: var(--f-display); color: var(--ink-faint); font-size: .85rem; letter-spacing: .08em; }
.card h3 { font-family: var(--f-display); font-size: 1.35rem; margin: 0 0 .7rem; letter-spacing: -.01em; }
.card p { color: var(--ink-soft); margin: 0; font-size: .98rem; }

@media (max-width: 720px) { .cards { grid-template-columns: 1fr; } }

/* ===================== Principles ===================== */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1.5rem, 4vw, 3rem); }
.principle { border-top: 2px solid var(--accent); padding-top: 1.2rem; }
.principle h3 { font-family: var(--f-display); font-size: 1.25rem; margin: 0 0 .6rem; }
.principle p { color: var(--ink-soft); margin: 0; }
@media (max-width: 640px) { .principles { grid-template-columns: 1fr; } }

/* ===================== Timeline ===================== */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline__item {
  display: grid; grid-template-columns: 160px 1fr; gap: 2rem;
  padding: 2rem 0; border-top: 1px solid var(--line);
}
.timeline__item:last-child { border-bottom: 1px solid var(--line); }
.timeline__meta span {
  font-family: var(--f-display); font-size: .9rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: .14em;
}
.timeline__body h3 { font-family: var(--f-display); font-size: 1.4rem; margin: 0 0 .6rem; letter-spacing: -.01em; }
.timeline__body p { color: var(--ink-soft); margin: 0; max-width: 62ch; }
@media (max-width: 640px) {
  .timeline__item { grid-template-columns: 1fr; gap: .6rem; padding: 1.6rem 0; }
}

/* ===================== References ===================== */
.refs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.ref {
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: clamp(1.6rem, 3vw, 2.4rem);
  transition: transform .4s var(--ease), border-color .4s var(--ease);
}
.ref:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.ref h3 { font-family: var(--f-display); font-size: 1.6rem; margin: 0 0 .3rem; letter-spacing: -.01em; }
.ref__kind { color: var(--accent); font-family: var(--f-display); font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; margin: 0 0 1rem; }
.ref p { color: var(--ink-soft); margin: 0; }
@media (max-width: 640px) { .refs { grid-template-columns: 1fr; } }

/* ===================== Contact ===================== */
.contact { text-align: center; position: relative; overflow: hidden; }
.contact::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(50vw 40vw at 50% 120%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%);
}
.contact__inner { max-width: 720px; margin-inline: auto; }
.contact .section__num { margin-inline: auto; }
.contact__title { font-family: var(--f-display); font-weight: 700; font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: -.02em; margin: 0 0 1rem; line-height: 1.05; }
.contact__lead { color: var(--ink-soft); font-size: 1.1rem; margin: 0 auto 2.4rem; max-width: 52ch; }
.contact__mail {
  display: inline-block; font-family: var(--f-display); font-weight: 600;
  font-size: clamp(1.3rem, 4vw, 2.2rem); letter-spacing: -.01em;
  border-bottom: 2px solid var(--line); padding-bottom: .3rem;
  transition: border-color .3s var(--ease), color .3s var(--ease);
}
.contact__mail:hover { border-color: var(--accent); color: var(--accent); }
.socials { list-style: none; display: flex; gap: 1.8rem; justify-content: center; padding: 0; margin: 2.6rem 0 0; flex-wrap: wrap; }
.socials a { color: var(--ink-soft); font-family: var(--f-display); font-size: .95rem; transition: color .25s var(--ease); }
.socials a:hover { color: var(--ink); }

/* ===================== Footer ===================== */
.footer { border-top: 1px solid var(--line); padding: 2rem 0; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; color: var(--ink-faint); font-size: .88rem; }
.footer__note { color: var(--ink-faint); }
.footer__top { color: var(--ink-soft); font-family: var(--f-display); transition: color .25s var(--ease); }
.footer__top:hover { color: var(--accent); }

/* ===================== Reveal on scroll ===================== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}