/* Tom Sievers — personal command-center look */
:root {
  --ink: #0a0e12;
  --ink-elevated: #121820;
  --ink-soft: #1a2330;
  --fog: #c8d0da;
  --paper: #eef2f6;
  --signal: #3ecf8e;
  --signal-dim: #2a9f6c;
  --warm: #e8a54b;
  --line: rgba(200, 208, 218, 0.14);
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --space: clamp(1rem, 2.5vw, 2rem);
  --max: 68rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--fog);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--signal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--paper);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--signal);
  color: var(--ink);
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  padding: 0.85rem var(--space);
  background: linear-gradient(180deg, rgba(10, 14, 18, 0.92), rgba(10, 14, 18, 0.55) 70%, transparent);
  backdrop-filter: blur(8px);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--signal);
}

.site-nav {
  display: flex;
  gap: 1.25rem;
}

.site-nav a {
  color: var(--fog);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--paper);
}

/* Hero — one composition */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  padding: 6.5rem var(--space) 4rem;
  overflow: hidden;
  isolation: isolate;
}

.hero__glow {
  position: absolute;
  inset: -20% -10% auto 30%;
  height: 70%;
  background:
    radial-gradient(ellipse at 70% 30%, rgba(62, 207, 142, 0.22), transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(232, 165, 75, 0.12), transparent 50%);
  z-index: -2;
  animation: glow-drift 14s ease-in-out infinite alternate;
}

.hero__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 75%);
  opacity: 0.7;
}

.hero__content {
  max-width: 40rem;
  animation: hero-rise 0.9s var(--ease) both;
}

.hero__brand {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.75rem, 9vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.045em;
  color: var(--paper);
}

.hero__headline {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 22ch;
}

.hero__support {
  margin: 0 0 1.75rem;
  max-width: 36ch;
  color: var(--fog);
  font-size: 1.05rem;
}

.hero__cta,
.contact__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.35rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--signal);
  color: var(--ink);
}

.btn--primary:hover {
  background: #54db9d;
  color: var(--ink);
}

.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}

.btn--ghost:hover {
  border-color: var(--fog);
  color: var(--paper);
}

/* Sections */
.section {
  padding: 5rem var(--space);
  border-top: 1px solid var(--line);
}

.section__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section__inner--narrow {
  max-width: 36rem;
}

.section__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm);
}

.section__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
  color: var(--paper);
}

.section__lead {
  margin: 0 0 2.5rem;
  max-width: 42ch;
  color: var(--fog);
}

/* Skills */
.skills__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 720px) {
  .skills__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.skills__item {
  padding-top: 1rem;
  border-top: 2px solid var(--signal-dim);
}

.skills__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--paper);
}

.skills__item p {
  margin: 0;
  font-size: 0.98rem;
}

/* Brand tiles — interactive containers */
.brands__grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .brands__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.brand-tile {
  position: relative;
  display: grid;
  gap: 0.4rem;
  padding: 1.5rem 1.35rem 1.35rem;
  background: var(--ink-elevated);
  border: 1px solid var(--line);
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.3s var(--ease), background 0.25s ease;
}

.brand-tile::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--signal);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.35s var(--ease);
}

.brand-tile:hover,
.brand-tile:focus-visible {
  border-color: rgba(62, 207, 142, 0.45);
  background: var(--ink-soft);
  transform: translateY(-4px);
  color: inherit;
  outline: none;
}

.brand-tile:hover::before,
.brand-tile:focus-visible::before {
  transform: scaleY(1);
}

.brand-tile__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--paper);
  letter-spacing: -0.02em;
}

.brand-tile__desc {
  font-size: 0.95rem;
  color: var(--fog);
}

.brand-tile__go {
  margin-top: 0.75rem;
  font-size: 1.25rem;
  color: var(--signal);
  transition: transform 0.3s var(--ease);
}

.brand-tile:hover .brand-tile__go,
.brand-tile:focus-visible .brand-tile__go {
  transform: translateX(6px);
}

/* Side project */
.side {
  background: linear-gradient(180deg, transparent, rgba(26, 35, 48, 0.5));
}

.side__line {
  margin: 0;
  font-size: 1.05rem;
}

/* Contact */
.contact {
  padding-bottom: 6rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem var(--space) 2.5rem;
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .site-footer__inner {
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
  }

  .site-footer__copy {
    text-align: right;
  }
}

.site-footer__brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--paper);
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
}

.site-footer__links a {
  color: var(--fog);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-footer__links a:hover {
  color: var(--signal);
}

.site-footer__copy {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(200, 208, 218, 0.65);
}

/* Motion: reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.skills__item.reveal:nth-child(2),
.brand-tile.reveal:nth-child(2) {
  transition-delay: 0.08s;
}

.skills__item.reveal:nth-child(3),
.brand-tile.reveal:nth-child(3) {
  transition-delay: 0.16s;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero__content,
  .hero__glow,
  .reveal,
  .btn,
  .brand-tile,
  .brand-tile__go,
  .brand-tile::before {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@keyframes hero-rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes glow-drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-4%, 3%, 0) scale(1.05);
  }
}

/* Error page */
.error-page {
  min-height: 70vh;
  display: grid;
  place-content: center;
  padding: 6rem var(--space) 4rem;
  text-align: center;
}

.error-page h1 {
  font-family: var(--font-display);
  color: var(--paper);
}