/* ==========================================================================
   Robert Bandy – main stylesheet
   Structure: 1 tokens · 2 base · 3 header/footer · 4 home · 5 work · 6 case study
              7 about/contact · 8 cursor · 9 motion helpers · 10 reduced motion
   ========================================================================== */

/* 1. Design tokens — change the look of the whole site here ----------------- */
:root {
  /* colour */
  --bg: #fff;
  --ink: #0b0b0b;
  --muted: #6b6b6b;      /* 5.3:1 on white */
  --line: #e7e7e7;
  --tile-bg: #efefef;
  --accent: #e8452c;     /* focus rings only */

  /* type: a quiet system grotesque. Swap the stack to change the font site-wide. */
  --font: "Helvetica Neue", Helvetica, "Inter", "Segoe UI", Arial, sans-serif;
  --fs-xs: 0.75rem;                              /* 12 */
  --fs-sm: 0.875rem;                             /* 14 nav, captions */
  --fs-base: 1rem;                               /* 16 */
  --fs-lg: clamp(1.25rem, 1rem + 1vw, 1.75rem); /* intros */
  --fs-xl: clamp(2rem, 1.2rem + 3vw, 4rem);     /* page titles */
  --fs-display: 15.2vw;                         /* hero name */

  /* spacing (4px base) */
  --s1: 0.25rem; --s2: 0.5rem; --s3: 0.75rem; --s4: 1rem;
  --s6: 1.5rem; --s8: 2rem; --s12: 3rem; --s16: 4rem; --s24: 6rem;
  --g: clamp(1rem, 2.5vw, 2rem);                 /* page gutter */
  --header-h: 3.5rem;

  /* shape */
  --radius: 14px;
  --tile-ratio: 4 / 5;                           /* work grid tile crop */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* 2. Base ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 var(--fs-base)/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}
img, video, iframe { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
ul { padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.skip { position: absolute; left: var(--g); top: -4rem; z-index: 100; background: var(--ink); color: #fff; padding: var(--s2) var(--s4); border-radius: 99px; }
.skip:focus { top: var(--s3); }
.label { font-size: var(--fs-sm); font-weight: 500; color: var(--muted); letter-spacing: 0.01em; margin-bottom: var(--s4); }

.btn {
  display: inline-block; padding: var(--s3) var(--s6); border-radius: 99px; text-decoration: none;
  background: var(--ink); color: #fff; font-size: var(--fs-sm); font-weight: 500;
  transition: transform 0.3s var(--ease), background 0.2s;
}
.btn:hover { transform: translateY(-2px); background: #333; }

/* 3. Header / footer ------------------------------------------------------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--header-h);
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 var(--g); font-size: var(--fs-sm); font-weight: 500;
}
.site-header a { text-decoration: none; }
.site-header nav ul { display: flex; gap: var(--s6); }
.site-header nav a { position: relative; padding: var(--s2) 0; }
.site-header nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform 0.35s var(--ease); }
.site-header nav a:hover::after, .site-header nav a[aria-current="page"]::after { transform: scaleX(1); }
.is-home .site-header { color: #fff; text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35); }
body:not(.is-home) .site-header { background: linear-gradient(var(--bg) 40%, transparent); }

.page { padding: calc(var(--header-h) + var(--s8)) var(--g) var(--s16); }
.site-footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s2) var(--s6);
  padding: var(--s6) var(--g) var(--s8); border-top: 1px solid var(--line);
  font-size: var(--fs-sm); color: var(--muted);
}

/* 4. Home ------------------------------------------------------------------ */
/* White type over photography, kept legible by soft dark scrims at top and bottom. */
/* touch-action: none keeps the browser from cancelling finger tracking (the page itself never scrolls). */
.hero { position: relative; height: 100vh; height: 100svh; overflow: hidden; background: #111; padding: 0; touch-action: none; }
.hero::before, .hero::after { content: ""; position: absolute; left: 0; right: 0; z-index: 1; pointer-events: none; }
.hero::before { top: 0; height: 7rem; background: linear-gradient(rgba(0, 0, 0, 0.4), transparent); }
.hero::after { bottom: 0; height: 60%; background: linear-gradient(transparent, rgba(0, 0, 0, 0.55)); }
.hero-track { position: absolute; inset: 0; display: flex; transform: translate3d(calc(var(--i, 0) * -100% + var(--drag, 0px)), 0, 0); transition: transform 0.9s cubic-bezier(0.7, 0, 0.2, 1); }
.hero-track.is-dragging { transition: none; }
.hero-slide { flex: 0 0 100%; position: relative; overflow: hidden; display: block; }
.hero-img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.06) translate3d(var(--shift, 0px), 0, 0); transition: transform 0.9s cubic-bezier(0.7, 0, 0.2, 1); }
.hero-track.is-dragging .hero-img { transition: none; }

.hero-name {
  position: absolute; left: var(--g); right: var(--g); bottom: calc(var(--g) + 4rem); z-index: 2;
  color: #fff; pointer-events: none;
  font-size: var(--fs-display); font-weight: 800; line-height: 0.82; letter-spacing: -0.045em;
  white-space: nowrap; user-select: none;
}
.hero-name .word { display: inline-block; }
.hero-name .ch { display: inline-block; transform-origin: 50% 100%; will-change: transform; }
.hero-tagline { position: absolute; z-index: 2; left: var(--g); top: calc(var(--header-h) + var(--s2)); max-width: 28ch; color: #fff; font-size: var(--fs-sm); text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35); }
.hero-ui {
  position: absolute; z-index: 2; left: var(--g); right: var(--g); bottom: var(--g);
  display: flex; justify-content: space-between; align-items: center; gap: var(--s4);
  color: #fff; font-size: var(--fs-sm); text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35);
}
.hero-caption a { text-decoration: none; }
.hero-caption span { opacity: 0.7; margin-left: var(--s2); }
.hero-controls { display: flex; align-items: center; gap: var(--s4); font-variant-numeric: tabular-nums; }
.hero-btn { width: 2.75rem; height: 2.75rem; display: grid; place-items: center; font-size: 1.25rem; border-radius: 50%; }
.hero-btn:hover { background: rgba(255, 255, 255, 0.25); }
@media (max-width: 599px) {
  :root { --fs-display: 25vw; }
  .hero-name { white-space: normal; line-height: 0.8; bottom: calc(var(--g) + 3.25rem); }
  .hero-name .word { display: block; }
  .hero-caption span { display: none; }
}

/* 5. Work ------------------------------------------------------------------ */
.work-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--s4); margin-bottom: var(--s8); }
.work-head h1 { font-size: var(--fs-sm); font-weight: 500; color: var(--muted); }
.filters { display: flex; flex-wrap: wrap; gap: var(--s2); }
.filters button { padding: var(--s2) var(--s4); border-radius: 99px; font-size: var(--fs-sm); font-weight: 500; color: var(--muted); border: 1px solid var(--line); transition: color 0.2s, background 0.2s, border-color 0.2s; }
.filters button:hover { color: var(--ink); border-color: var(--ink); }
.filters button[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }

.grid { display: grid; grid-template-columns: 1fr; gap: var(--s12) var(--g); }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .grid { grid-template-columns: repeat(4, 1fr); } }
.tile[hidden] { display: none; }
.tile a { display: block; text-decoration: none; }
.tile-frame { perspective: 900px; }
.tile-media {
  position: relative; overflow: hidden; border-radius: var(--radius); background: var(--tile-bg);
  aspect-ratio: var(--tile-ratio);
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
}
.tile-media.is-tilting { transition: transform 0.12s linear, box-shadow 0.5s var(--ease); box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.35); }
.tile-img { width: 100%; height: 100%; object-fit: cover; transform: translate3d(var(--tx, 0px), var(--ty, 0px), 0) scale(1.14); will-change: transform; }
.tile-title { margin-top: var(--s3); font-size: var(--fs-base); font-weight: 700; line-height: 1.25; }
.tile-cat { font-size: var(--fs-sm); color: var(--muted); }
.empty { margin-top: var(--s8); color: var(--muted); }

.float-preview { position: fixed; left: 0; top: 0; z-index: 40; width: 240px; aspect-ratio: 4 / 5; border-radius: var(--radius); overflow: hidden; pointer-events: none; opacity: 0; transition: opacity 0.2s; }
.float-preview.is-on { opacity: 1; }
.float-preview img { width: 100%; height: 100%; object-fit: cover; }

/* 6. Case study ------------------------------------------------------------ */
.cs { padding-left: 0; padding-right: 0; }
.cs-head { padding: 0 var(--g); display: grid; gap: var(--s4); margin-bottom: var(--s8); max-width: 70rem; }
.cs-head h1 { font-size: var(--fs-xl); font-weight: 800; line-height: 1; letter-spacing: -0.03em; }
.cs-sub { color: var(--muted); font-size: var(--fs-base); }
.cs-intro { font-size: var(--fs-lg); line-height: 1.3; max-width: 38ch; }
.cs-hero { width: 100%; }
.cs-hero img { width: 100%; height: auto; max-height: 90vh; max-height: 90svh; object-fit: cover; }
figcaption { padding: var(--s3) var(--g) 0; font-size: var(--fs-sm); color: var(--muted); max-width: 60ch; }
.cs-info { display: grid; gap: var(--s8); padding: var(--s12) var(--g); }
@media (min-width: 900px) { .cs-info { grid-template-columns: 1fr 2fr; gap: var(--s16); } }
.meta { display: grid; gap: var(--s3); align-content: start; }
.meta div { display: grid; grid-template-columns: 6rem 1fr; gap: var(--s4); font-size: var(--fs-sm); }
.meta dt, .cs-credits dt { color: var(--muted); }
.cs-desc { display: grid; gap: var(--s4); font-size: var(--fs-base); max-width: 62ch; }
.cs-gallery { display: grid; gap: var(--s12); }
.shot--full img, .shot--video .video { width: 100%; }
.row { display: grid; gap: var(--g); padding: 0 var(--g); }
@media (min-width: 900px) { .row { grid-template-columns: 1fr 1fr; } .row--single { grid-template-columns: minmax(0, 1fr); max-width: 50%; margin: 0 auto; } }
.row .shot img { width: 100%; border-radius: var(--radius); }
.row figcaption { padding-left: 0; }
.video { aspect-ratio: 16 / 9; background: #111; }
.video iframe { width: 100%; height: 100%; border: 0; }
.cs-credits { padding: var(--s16) var(--g) 0; display: grid; gap: var(--s4); }
.cs-credits h2 { font-size: var(--fs-sm); font-weight: 500; color: var(--muted); }
.cs-credits dl { display: grid; gap: var(--s2); font-size: var(--fs-sm); }
.cs-credits dl div { display: grid; grid-template-columns: minmax(0, 14rem) 1fr; gap: var(--s4); }
.cs-pager { display: grid; grid-template-columns: 1fr 1fr; gap: var(--g); padding: var(--s24) var(--g) 0; }
.pager-link { display: grid; gap: var(--s1); text-decoration: none; padding: var(--s6); border: 1px solid var(--line); border-radius: var(--radius); transition: border-color 0.25s, transform 0.4s var(--ease); }
.pager-link:hover { border-color: var(--ink); transform: translateY(-3px); }
.pager-next { text-align: right; }
.pager-label { font-size: var(--fs-sm); color: var(--muted); }
.pager-title { font-size: var(--fs-lg); font-weight: 700; line-height: 1.15; }

/* 7. About / contact ------------------------------------------------------- */
.about-lead { font-size: var(--fs-xl); font-weight: 800; line-height: 1.02; letter-spacing: -0.03em; max-width: 18ch; margin-bottom: var(--s16); }
.about-grid { display: grid; gap: var(--s12); }
@media (min-width: 900px) { .about-grid { grid-template-columns: 2fr 1fr 1fr; gap: var(--g); } }
.about-grid p + p { margin-top: var(--s4); }
.about-grid section > p, .about-grid section > ul { max-width: 56ch; }
.about-cta { margin-top: var(--s8); }
.plain { display: grid; gap: var(--s3); }
.contact-email { font-size: clamp(1.25rem, 6vw, 5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.05; overflow-wrap: anywhere; }
.contact-email a { text-decoration: none; }
.contact-email a:hover { text-decoration: underline; text-decoration-thickness: 3px; }
.contact-links { display: flex; flex-wrap: wrap; gap: var(--s2) var(--s8); margin-top: var(--s12); font-size: var(--fs-lg); }
.contact-note { margin-top: var(--s16); color: var(--muted); max-width: 40ch; }

/* 8. Custom cursor (only enabled by JS on fine pointers) ------------------- */
.cursor, .float-preview { display: none; }
html.has-cursor .cursor { display: block; position: fixed; left: 0; top: 0; z-index: 9999; pointer-events: none; opacity: 0; transition: opacity 0.2s; }
html.has-cursor .cursor.is-on { opacity: 1; }
html.has-cursor .float-preview { display: block; }
html.has-cursor, html.has-cursor a, html.has-cursor button { cursor: none; }
.cursor-dot, .cursor-bubble { position: absolute; border-radius: 50%; left: 0; top: 0; }
.cursor-dot { width: 10px; height: 10px; margin: -5px; background: var(--ink); box-shadow: 0 0 0 1.5px #fff; transition: transform 0.3s var(--ease); }
.cursor-bubble { width: 84px; height: 84px; margin: -42px; background: #fff; color: var(--ink); display: grid; place-items: center; font-size: var(--fs-sm); font-weight: 600; box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18); transform: scale(0); transition: transform 0.4s var(--ease); }
.cursor.is-link .cursor-dot { transform: scale(2.4); }
.cursor.is-label .cursor-dot { transform: scale(0); }
.cursor.is-label .cursor-bubble { transform: scale(1); }
.cursor.is-down .cursor-bubble { transform: scale(0.88); }

/* 9. Motion helpers -------------------------------------------------------- */
/* Page transition: JS adds .is-leaving before navigating. */
@keyframes page-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.js main { animation: page-in 0.6s var(--ease) backwards; }
.js .hero { animation-name: fade-in; }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.js.is-leaving main, .js.is-leaving .site-footer { opacity: 0; transform: translateY(-10px); transition: opacity 0.35s ease, transform 0.35s ease; }
.js.is-leaving .hero { transform: none; }

/* Scroll reveal (tiles + case study figures). Hidden only when JS is running. */
.js .tile, .js [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); transition-delay: calc(var(--d, 0) * 70ms); }
.js .tile.is-in, .js [data-reveal].is-in { opacity: 1; transform: none; }

/* 10. Reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-delay: 0s !important; transition-duration: 0.01ms !important; transition-delay: 0s !important; scroll-behavior: auto !important; }
  .js .tile, .js [data-reveal] { opacity: 1; transform: none; }
  .tile-img { transform: none; }
  .hero-img { transform: none; }
}