/* ============================================================
   Tomas Roos — Portfolio
   Dark monochrome theme · WCAG 2.1 AA · Modern studio aesthetic
   ============================================================ */

/* ---- Tokens -------------------------------------------------- */
:root {
  /* Surfaces (near-black, layered) */
  --bg:        #0B0B0C;
  --surface-1: #111113;
  --surface-2: #161618;
  --surface-3: #1F1F22;

  /* Ink (warm off-white, AA-checked on --bg) */
  --text:       #F3F2EF;   /* ~17:1  */
  --text-muted: #ABAAA6;   /* ~8.1:1 */
  --text-dim:   #8C8B86;   /* ~5.8:1 */

  /* Lines */
  --line:        rgba(243, 242, 239, 0.10);
  --line-2:      rgba(243, 242, 239, 0.18);
  --line-strong: rgba(243, 242, 239, 0.30);

  /* Focus + interaction */
  --focus: #F3F2EF;
  --ink-invert: #0B0B0C;

  /* Single accent — warm amber (9:1 on --bg) */
  --accent: #E0A458;

  /* Type */
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;

  /* Fluid type scale */
  --t-xs:   0.75rem;                              /* 12 */
  --t-sm:   0.875rem;                             /* 14 */
  --t-base: 1rem;                                 /* 16 */
  --t-md:   clamp(1.15rem, 0.9rem + 1vw, 1.5rem);
  --t-lg:   clamp(1.6rem, 1.1rem + 2vw, 2.4rem);
  --t-xl:   clamp(2.4rem, 1.4rem + 4.4vw, 4.6rem);
  --t-2xl:  clamp(3rem, 1.6rem + 6.4vw, 7rem);

  /* Spacing */
  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2.25rem;
  --sp-5: 3.5rem;
  --sp-6: 5rem;
  --sp-7: 7.5rem;

  --container: 1180px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 14px;
  --radius-lg: 20px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: dark;
}

/* ---- Reset --------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  font-size: var(--t-base);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  font-feature-settings: 'kern', 'liga', 'calt';
}

img, svg, video { display: block; max-width: 100%; height: auto; }
img { background: var(--surface-2); }

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

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

/* ---- Page-load fade (pure CSS — never leaves the page blank) - */
@keyframes pageIn { from { opacity: 0; } to { opacity: 1; } }
body { animation: pageIn 0.5s var(--ease) both; }

/* ---- Focus visibility --------------------------------------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}
.keyboard-nav a:focus-visible,
.keyboard-nav button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* ---- Skip link ---------------------------------------------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: -120px;
  transform: translateX(-50%);
  z-index: 200;
  background: var(--text);
  color: var(--ink-invert);
  padding: 0.7rem 1.2rem;
  border-radius: 0 0 10px 10px;
  font-weight: 600;
  font-size: var(--t-sm);
  transition: top 0.25s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---- Layout helpers ----------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--sp-7); }
.section--tight { padding-block: var(--sp-6); }
.section--alt { background: var(--surface-1); }

/* Offset anchored sections so the sticky header never covers them */
section[id],
[id].cs-block {
  scroll-margin-top: 92px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-5);
}
.section-head__text { max-width: 42ch; }

/* ---- Typography --------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-body);
  font-size: var(--t-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow--plain { color: var(--accent); }

.h-section {
  font-size: var(--t-lg);
  margin-top: var(--sp-2);
}
.lead {
  color: var(--text-muted);
  font-size: var(--t-md);
  line-height: 1.55;
  max-width: 46ch;
}
.muted { color: var(--text-muted); }

/* ============================================================
   Header / Navigation
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
              backdrop-filter 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(11, 11, 12, 0.78);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom-color: var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  transition: height 0.3s var(--ease);
}
.site-header.is-scrolled .nav { height: 64px; }

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  letter-spacing: 0.04em;
  font-weight: 500;
  padding: 0.4rem 0;
}
.brand b { font-weight: 700; }
.brand span { color: var(--text-dim); }
.brand:hover span { color: var(--text); transition: color 0.25s var(--ease); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav__link {
  position: relative;
  padding: 0.55rem 0.9rem;
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.34rem;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav__link:hover { color: var(--text); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link[aria-current="page"],
.nav__link.is-active { color: var(--text); }
.nav__link[aria-current="page"]::after,
.nav__link.is-active::after { transform: scaleX(1); }

.nav__cta {
  margin-left: 0.5rem;
}

.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--line-2);
}
.nav__toggle:hover { background: var(--surface-2); }
.nav__toggle-bars {
  position: relative;
  width: 18px;
  height: 12px;
}
.nav__toggle-bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.6px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav__toggle-bars span:nth-child(1) { top: 0; }
.nav__toggle-bars span:nth-child(2) { top: 5px; }
.nav__toggle-bars span:nth-child(3) { top: 10px; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---- Buttons ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-body);
  font-size: var(--t-sm);
  font-weight: 600;
  border-radius: 999px;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
              color 0.25s var(--ease), border-color 0.25s var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn svg { width: 1em; height: 1em; }
.btn--primary { background: var(--text); color: var(--ink-invert); }
.btn--primary:hover { transform: translateY(-2px); background: #fff; }
.btn--primary:active { transform: translateY(0); }
.btn--ghost { border-color: var(--line-2); color: var(--text); }
.btn--ghost:hover { border-color: var(--line-strong); background: var(--surface-2); transform: translateY(-2px); }
.btn--ghost:active { transform: translateY(0); }
.btn .arrow { transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translate(3px, -3px); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding-top: clamp(3.5rem, 7vw, 7rem);
  padding-bottom: var(--sp-5);
}
.hero__title {
  font-size: var(--t-2xl);
  letter-spacing: -0.035em;
  line-height: 0.98;
}
.hero__title .line { display: block; overflow: hidden; }
.hero__title .line > span {
  display: block;
  transform: translateY(102%);
  animation: rise 0.9s var(--ease-out) forwards;
}
.hero__title .line:nth-child(1) > span { animation-delay: 0.05s; }
.hero__title .line:nth-child(2) > span { animation-delay: 0.16s; }
.hero__title .dim { color: var(--text-dim); }
@keyframes rise { to { transform: translateY(0); } }

.hero__intro {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--sp-4);
  flex-wrap: wrap;
  margin-top: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line);
}
.hero__bio {
  max-width: 44ch;
  color: var(--text-muted);
  font-size: var(--t-md);
  line-height: 1.55;
}
.hero__bio strong { color: var(--accent); font-weight: 600; }
.hero__actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ============================================================
   Work grid
   ============================================================ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-3);
}
.work-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.3s var(--ease),
              background 0.3s var(--ease);
}
.work-card:hover {
  transform: translateY(-6px);
  border-color: var(--line-2);
  background: var(--surface-2);
}
.work-card__media {
  position: relative;
  aspect-ratio: 16 / 11;
  overflow: hidden;
  background: var(--surface-3);
}
.work-card__track {
  display: block;
  width: 100%;
  height: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  white-space: nowrap;
  scrollbar-width: none;
}
.work-card__track::-webkit-scrollbar { display: none; }
.work-card__slide {
  display: inline-block;
  vertical-align: top;
  width: 100%;
  height: 100%;
  scroll-snap-align: start;
}
.work-card__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
  pointer-events: none;
  user-select: none;
}
.work-card:hover .work-card__media:not(.work-card__media--scroll) .work-card__slide img {
  transform: scale(1.045);
}
.work-card__media--scroll { cursor: grab; }
.work-card__dots {
  position: absolute;
  left: 50%;
  bottom: 12px;
  transform: translateX(-50%);
  display: inline-flex;
  gap: 0.4rem;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  background: rgba(11, 11, 12, 0.55);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  z-index: 2;
  pointer-events: none;
}
.work-card__dot {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: rgba(243, 242, 239, 0.4);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.work-card__dot.is-active {
  background: var(--accent);
  transform: scale(1.3);
}
.work-card__num {
  position: absolute;
  top: 14px;
  left: 16px;
  font-family: var(--font-display);
  font-size: var(--t-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text);
  background: rgba(11, 11, 12, 0.7);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
}
.work-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: var(--sp-3);
  flex: 1;
}
.work-card__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.work-card__title {
  font-size: var(--t-md);
  font-weight: 600;
}
.work-card__year {
  font-size: var(--t-sm);
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.work-card__desc {
  font-size: var(--t-sm);
  color: var(--text-muted);
  line-height: 1.6;
}
.work-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: auto;
  padding-top: var(--sp-2);
}
.work-card__role {
  font-size: var(--t-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.work-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--text);
}
.work-card__link .arrow { transition: transform 0.25s var(--ease); }
.work-card:hover .work-card__link { color: var(--accent); }
.work-card:hover .work-card__link .arrow { transform: translate(3px, -3px); }

/* Stretched link for whole-card click target */
.stretched-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}
.work-card { position: relative; }

/* ---- Tags --------------------------------------------------- */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-size: var(--t-xs);
  color: var(--text-muted);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
}

/* ============================================================
   Visual work gallery — horizontal side-scroll, 6+ items
   ============================================================ */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-2);
}
.gallery--scroll {
  display: grid;
  grid-template-columns: none;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, calc((100% - var(--sp-2) * 2) / 3));
  gap: var(--sp-2);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
  padding-bottom: var(--sp-2);
  -webkit-overflow-scrolling: touch;
}
.gallery--scroll::-webkit-scrollbar { height: 8px; }
.gallery--scroll::-webkit-scrollbar-track { background: transparent; }
.gallery--scroll::-webkit-scrollbar-thumb {
  background: var(--line-2);
  border-radius: 999px;
}
.gallery--scroll::-webkit-scrollbar-thumb:hover { background: var(--line-strong); }
.gallery--scroll .gallery__item { scroll-snap-align: start; }
.gallery__item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface-2);
}
.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.gallery__item:hover img { transform: scale(1.05); }
.gallery__cap {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1.4rem 1rem 0.85rem;
  background: linear-gradient(to top, rgba(11,11,12,0.92), transparent);
  transform: translateY(8px);
  opacity: 0;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.gallery__item:hover .gallery__cap,
.gallery__item:focus-within .gallery__cap {
  opacity: 1;
  transform: translateY(0);
}
.gallery__cap h3 { font-size: var(--t-sm); font-weight: 600; }
.gallery__cap p { font-size: var(--t-xs); color: var(--text-muted); }

/* ============================================================
   Writing list
   ============================================================ */
.writing-list {
  border-top: 1px solid var(--line);
}
.writing-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) 0.4rem;
  border-bottom: 1px solid var(--line);
  transition: padding 0.3s var(--ease);
}
.writing-item:hover { padding-inline: 1rem; }
.writing-item__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.writing-item__date {
  font-size: var(--t-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.writing-item__title {
  font-size: var(--t-md);
  font-weight: 600;
  transition: color 0.25s var(--ease);
}
.writing-item:hover .writing-item__title { color: #fff; }
.writing-item__excerpt {
  font-size: var(--t-sm);
  color: var(--text-muted);
  max-width: 60ch;
}
.writing-item__arrow {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  color: var(--text);
  transition: background 0.25s var(--ease), transform 0.25s var(--ease),
              border-color 0.25s var(--ease);
}
.writing-item:hover .writing-item__arrow {
  background: var(--accent);
  color: var(--ink-invert);
  border-color: var(--accent);
  transform: translate(3px, -3px);
}

/* ============================================================
   About
   ============================================================ */
.about {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--sp-5);
  align-items: center;
}
.about__portrait {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 4 / 5;
}
.about__portrait img { width: 100%; height: 100%; object-fit: cover; }
.about__title {
  font-size: var(--t-lg);
  margin: var(--sp-2) 0 var(--sp-3);
}
.about__text p { color: var(--text-muted); margin-bottom: var(--sp-2); max-width: 52ch; }
.about__text p strong { color: var(--text); font-weight: 600; }
.about__meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-2);
  margin-top: var(--sp-3);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--line);
}
.about__meta dt {
  font-size: var(--t-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}
.about__meta dd { font-size: var(--t-sm); color: var(--text); }

/* ============================================================
   Contact / CTA
   ============================================================ */
.cta {
  text-align: center;
  border-top: 1px solid var(--line);
}
.cta__eyebrow { justify-content: center; }
.cta__title {
  font-size: var(--t-xl);
  letter-spacing: -0.03em;
  margin: var(--sp-3) 0 var(--sp-4);
}
.cta__mail {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--t-md);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 1.5px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.35s var(--ease);
  padding-bottom: 2px;
}
.cta__mail:hover { background-size: 100% 1.5px; }
.cta__links {
  display: flex;
  justify-content: center;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.cta__links a {
  font-size: var(--t-sm);
  color: var(--text-muted);
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.cta__links a:hover { color: var(--text); border-color: var(--line-strong); transform: translateY(-2px); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--sp-4);
}
.site-footer__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.site-footer small { font-size: var(--t-sm); color: var(--text-dim); }
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--text); }
.site-footer__top {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--t-sm);
  color: var(--text-muted);
}
.site-footer__top:hover { color: var(--text); }
.site-footer__top .arrow { transition: transform 0.25s var(--ease); }
.site-footer__top:hover .arrow { transform: translateY(-3px); }

/* ============================================================
   Sub-page: back link + page intro
   ============================================================ */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.5rem 0;
}
.back-link:hover { color: var(--text); }
.back-link .arrow { transition: transform 0.25s var(--ease); }
.back-link:hover .arrow { transform: translateX(-3px); }

/* ============================================================
   Case study
   ============================================================ */
.cs-header { padding-top: var(--sp-5); padding-bottom: var(--sp-4); }
.cs-title {
  font-size: var(--t-xl);
  letter-spacing: -0.03em;
  margin: var(--sp-2) 0 var(--sp-3);
}
.cs-title__logo {
  display: block;
  width: auto;
  max-width: min(100%, 460px);
  height: auto;
  max-height: clamp(64px, 9vw, 120px);
  background: transparent;
}
.cs-summary {
  font-size: var(--t-md);
  color: var(--text-muted);
  max-width: 56ch;
  line-height: 1.55;
}
.cs-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-2);
  margin-top: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--line);
}
.cs-meta dt {
  font-size: var(--t-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}
.cs-meta dd { font-size: var(--t-sm); font-weight: 600; }

.cs-cover {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-2);
}
.cs-cover img { width: 100%; transition: transform 0.6s var(--ease); }
.cs-cover--clickable { cursor: zoom-in; }
.cs-cover--clickable:hover img { transform: scale(1.02); }
.cs-cover__hint {
  position: absolute;
  right: 14px;
  bottom: 14px;
  font-family: var(--font-body);
  font-size: var(--t-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  background: rgba(11, 11, 12, 0.7);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
}

.cs-block { padding-block: var(--sp-6); }
.cs-block + .cs-block { border-top: 1px solid var(--line); }
.cs-block--alt { background: var(--surface-1); }
.cs-block__title {
  font-size: var(--t-lg);
  margin: var(--sp-2) 0 var(--sp-3);
}
.cs-block__lead {
  color: var(--text-muted);
  font-size: var(--t-md);
  line-height: 1.55;
  max-width: 54ch;
  margin-bottom: var(--sp-4);
}

.cs-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-2);
}
.cs-card {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-3);
}
.cs-block--alt .cs-card { background: var(--surface-2); }

.cs-research {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line);
  display: grid;
  gap: var(--sp-3);
}
.cs-research__title {
  font-family: var(--font-display);
  font-size: var(--t-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.cs-research__figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-2);
}
.cs-research__figure img { width: 100%; height: auto; display: block; }
.cs-research__body {
  display: grid;
  gap: var(--sp-2);
  max-width: 60ch;
}
.cs-research__body p {
  color: var(--text-muted);
  font-size: var(--t-base);
  line-height: 1.7;
}
@media (min-width: 901px) {
  .cs-research {
    grid-template-columns: 1.1fr 1fr;
    grid-template-areas:
      "title title"
      "figure body";
    align-items: start;
    gap: var(--sp-4);
  }
  .cs-research__title { grid-area: title; }
  .cs-research__figure { grid-area: figure; }
  .cs-research__body { grid-area: body; }
}

.cs-process__figure {
  margin: var(--sp-3) 0 var(--sp-4);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-2);
}
.cs-process__figure img { width: 100%; height: auto; display: block; }
.cs-process__body {
  display: grid;
  gap: var(--sp-2);
  max-width: 64ch;
}
.cs-process__body p {
  color: var(--text-muted);
  font-size: var(--t-base);
  line-height: 1.7;
}

.cs-screens {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  margin-top: var(--sp-3);
}
@media (min-width: 720px) {
  .cs-screens { grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); }
}
.cs-screens__item {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-2);
}
.cs-screens__item img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.cs-screens__item figcaption {
  font-size: var(--t-sm);
  color: var(--text-muted);
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--line);
  line-height: 1.55;
}

/* Devices showcase */
.cs-devices {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  margin-top: var(--sp-3);
}
@media (min-width: 720px) {
  .cs-devices { grid-template-columns: 1.2fr 1fr; gap: var(--sp-4); align-items: end; }
}
.cs-devices__item {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-2);
}
.cs-devices__item img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.cs-devices__item figcaption {
  font-size: var(--t-sm);
  color: var(--text-muted);
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--line);
  line-height: 1.55;
}

/* Showcase — alternating editorial rows, mixed aspect ratios */
.cs-showcase {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  margin-top: var(--sp-4);
}
.cs-showcase__row {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  align-items: center;
}
.cs-showcase__text h3 {
  font-size: var(--t-md);
  font-weight: 600;
  margin-bottom: var(--sp-1);
}
.cs-showcase__text p {
  font-size: var(--t-sm);
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 42ch;
}
.cs-showcase__media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface-2);
}
.cs-showcase__media img {
  display: block;
  width: 100%;
  height: auto;
}
@media (min-width: 720px) {
  .cs-showcase { gap: var(--sp-6); }
  .cs-showcase__row--wide {
    grid-template-columns: 1fr 1.5fr;
    gap: var(--sp-5);
  }
  .cs-showcase__row--tall {
    grid-template-columns: 320px 1fr;
    gap: var(--sp-6);
  }
  /* tall: portrait image leads, text follows */
  .cs-showcase__row--tall .cs-showcase__text { order: 2; }
  .cs-showcase__row--tall .cs-showcase__media { order: 1; }
}

/* Image-led feature cards */
.cs-cards--media {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.cs-card--media {
  padding: 0;
  overflow: hidden;
  background: var(--surface-2);
}
.cs-card--media .cs-card__media {
  margin: 0;
  background: var(--surface-2);
}
.cs-card--media .cs-card__media img {
  display: block;
  width: 100%;
  height: auto;
}

.cs-screens--split {
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 900px) {
  .cs-screens--split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: start;
  }
  .cs-screens--split .cs-screens__item { margin: 0; }
}

.cs-screens__list {
  display: grid;
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.cs-screens__list li {
  padding: var(--sp-2) var(--sp-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}
.cs-screens__list h4 {
  font-family: var(--font-display);
  font-size: var(--t-base);
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: 0.25rem;
  color: var(--text);
}
.cs-screens__list p {
  font-size: var(--t-sm);
  color: var(--text-muted);
  line-height: 1.6;
}
.cs-card h3 {
  font-size: var(--t-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}
.cs-card p { font-size: var(--t-sm); color: var(--text-muted); line-height: 1.65; }

.cs-timeline { display: grid; gap: 0; }
.cs-timeline__item {
  position: relative;
  padding-left: var(--sp-4);
  padding-bottom: var(--sp-4);
  border-left: 1px solid var(--line-2);
}
.cs-timeline__item:last-child { padding-bottom: 0; }
.cs-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text);
}
.cs-timeline__item h3 { font-size: var(--t-base); font-weight: 600; margin-bottom: 0.3rem; }
.cs-timeline__item p { font-size: var(--t-sm); color: var(--text-muted); line-height: 1.65; max-width: 60ch; }

.cs-mockup {
  margin-top: var(--sp-4);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-2);
}

.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-2);
}
.cs-stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-3);
  background: var(--surface-2);
}
.cs-stat__value {
  font-family: var(--font-display);
  font-size: var(--t-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.cs-stat__label {
  font-size: var(--t-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

.cs-end { text-align: left; }
.cs-end__thanks {
  margin-top: var(--sp-3);
  font-family: var(--font-display);
  font-size: var(--t-md);
  color: var(--accent);
  letter-spacing: -0.01em;
}

/* Pager (prev / next project) */
.cs-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}
.cs-pager__link {
  padding: var(--sp-5) 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: background 0.25s var(--ease);
}
.cs-pager__link:hover { background: var(--surface-1); }
.cs-pager__link--next { text-align: right; align-items: flex-end; }
.cs-pager__kicker { font-size: var(--t-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim); }
.cs-pager__name { font-family: var(--font-display); font-size: var(--t-md); font-weight: 600; }
.cs-pager__link:hover .cs-pager__name { color: #fff; }

/* ============================================================
   Article (blog post)
   ============================================================ */
.article {
  max-width: 720px;
  margin-inline: auto;
  padding-top: var(--sp-5);
}
.article__title {
  font-size: var(--t-xl);
  letter-spacing: -0.03em;
  margin: var(--sp-2) 0 var(--sp-3);
}
.article__meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: var(--t-sm);
  color: var(--text-dim);
}
.article__meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--line-strong); }
.article__cover {
  margin-block: var(--sp-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-2);
}
.article__cover--pdf object {
  display: block;
  width: 100%;
  height: clamp(420px, 70vh, 820px);
  border: 0;
  background: var(--surface-2);
}
.article__cover figcaption,
.prose figcaption {
  font-size: var(--t-sm);
  color: var(--text-dim);
  padding: 0.8rem 1rem;
  border-top: 1px solid var(--line);
}

/* Prose (rendered markdown) */
.prose { font-size: 1.06rem; line-height: 1.8; color: var(--text); }
.prose > * + * { margin-top: 1.35em; }
.prose h2 {
  font-size: var(--t-md);
  margin-top: 2em;
  letter-spacing: -0.02em;
}
.prose h3 { font-size: 1.15rem; margin-top: 1.6em; }
.prose p { color: #DEDDD9; }
.prose strong { color: #fff; font-weight: 600; }
.prose em { font-style: italic; }
.prose a {
  color: var(--accent);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 100% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: opacity 0.25s var(--ease);
}
.prose a:hover { opacity: 0.72; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose ul li { list-style: disc; }
.prose ol li { list-style: decimal; }
.prose li { margin-top: 0.5em; color: #DEDDD9; }
.prose li::marker { color: var(--text-dim); }
.prose blockquote {
  border-left: 2px solid var(--line-strong);
  padding-left: 1.2em;
  color: var(--text-muted);
  font-style: italic;
}
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: var(--surface-3);
  padding: 0.15em 0.4em;
  border-radius: 5px;
}
.prose pre {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  overflow-x: auto;
}
.prose pre code { background: none; padding: 0; }
.prose hr { border: none; border-top: 1px solid var(--line); margin-block: 2em; }
.prose figure img { border-radius: var(--radius); border: 1px solid var(--line); }
.prose img { border-radius: var(--radius); }

/* ============================================================
   Empty / loading states
   ============================================================ */
.state {
  text-align: center;
  padding: var(--sp-6) 0;
  color: var(--text-muted);
}
.state h2 { font-size: var(--t-md); color: var(--text); margin-bottom: 0.5rem; }

/* ============================================================
   Scroll-reveal animation
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: calc(var(--i, 0) * 80ms);
}
.reveal.in-view { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .nav__links {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface-1);
    border-bottom: 1px solid var(--line);
    padding: var(--sp-2) var(--gutter) var(--sp-3);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  }
  .nav__links.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__link {
    padding: 0.95rem 0.4rem;
    font-size: var(--t-md);
    border-bottom: 1px solid var(--line);
  }
  .nav__link::after { display: none; }
  .nav__cta { margin: var(--sp-2) 0 0; justify-content: center; }
  .nav__toggle { display: inline-flex; }

  .work-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: var(--sp-4); }
  .about__portrait { max-width: 320px; }
  .cs-meta { grid-template-columns: repeat(2, 1fr); }
  .cs-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .hero__intro { flex-direction: column; align-items: flex-start; }
  .hero__actions { width: 100%; }
  .hero__actions .btn { flex: 1; justify-content: center; }
  .gallery { grid-template-columns: 1fr; }
  .cs-cards { grid-template-columns: 1fr; }
  .cs-pager { grid-template-columns: 1fr; }
  .cs-pager__link--next { text-align: left; align-items: flex-start; }
  .cs-pager__link { padding: var(--sp-4) 0; }
  .cs-pager__link + .cs-pager__link { border-top: 1px solid var(--line); }
  .section-head { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   WebGL shader canvas background
   canvas#shader-bg is position:fixed z-index:-1 (behind body).
   body becomes transparent so the canvas shows through the hero
   (which has no background), while every other section keeps
   an explicit solid colour to mask the canvas underneath.
   ============================================================ */
html { background: var(--bg); }
body { background: transparent; }

/* Sections that should sit opaque above the canvas */
.section:not(.section--alt),
.cta,
.site-footer { background: var(--bg); }

/* ============================================================
   Hero / About (combined section at top of homepage)
   ============================================================ */
.hero--about {
  padding-top: clamp(4.5rem, 9vw, 8.5rem);
  padding-bottom: var(--sp-6);
}
.hero--about .about__title {
  font-size: var(--t-xl);
  letter-spacing: -0.03em;
  margin: 0 0 var(--sp-3);
}
.hero--about .about__text p {
  color: var(--text-muted);
  font-size: var(--t-md);
  line-height: 1.55;
  max-width: 52ch;
}

/* ============================================================
   Lightbox (case study image viewer)
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(8, 8, 9, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  display: none;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: clamp(12px, 4vw, 48px);
}
.lightbox.is-open { display: flex; }
body.lightbox-open { overflow: hidden; }
.lightbox__track {
  flex: 1;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  gap: clamp(8px, 2vw, 24px);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.lightbox__track::-webkit-scrollbar { display: none; }
.lightbox__slide {
  scroll-snap-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-width: 0;
}
.lightbox__slide img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface-2);
}
.lightbox__close,
.lightbox__nav {
  position: absolute;
  background: rgba(11, 11, 12, 0.7);
  color: var(--text);
  border: 1px solid var(--line-2);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  font-size: 1.4rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.lightbox__close { top: 18px; right: 18px; font-size: 1.6rem; }
.lightbox__nav--prev { left: 18px; top: 50%; transform: translateY(-50%); }
.lightbox__nav--next { right: 18px; top: 50%; transform: translateY(-50%); }
.lightbox__close:hover,
.lightbox__nav:hover { background: var(--surface-3); border-color: var(--line-strong); }
.lightbox__nav--prev:hover { transform: translate(-2px, -50%); }
.lightbox__nav--next:hover { transform: translate(2px, -50%); }
.lightbox__dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding-top: var(--sp-2);
}
.lightbox__dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--line-strong);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.lightbox__dot.is-active { background: var(--accent); transform: scale(1.3); }

@media (max-width: 560px) {
  .lightbox__nav { display: none; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero__title .line > span { transform: none; }
}