/* ==========================================================================
   RobinCharlotte — Interior Design & Creative Studio
   Gallery minimal: white walls, black type, the work does the talking.
   ========================================================================== */

/* Self-hosted font (SIL Open Font License) */
@font-face { font-family: "Instrument Sans"; src: url("/assets/fonts/instrument-sans-latin-wght-normal.woff2") format("woff2"); font-weight: 400 700; font-style: normal; font-display: swap; }

:root {
  --bg: #ffffff;
  --bg-2: #f5f5f3;
  --bg-3: #ebebe8;
  --ink: #111111;
  --ink-2: #4a4a47;
  --muted: #8b8b86;
  --line: rgba(17, 17, 17, 0.12);

  --sans: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --serif: var(--sans);

  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --max: 1520px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(0.97rem, 0.93rem + 0.15vw, 1.0625rem);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
::selection { background: var(--ink); color: var(--bg); }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.skip-link { position: absolute; left: 1rem; top: -4rem; z-index: 200; background: var(--ink); color: var(--bg); padding: 0.6rem 1rem; }
.skip-link:focus { top: 1rem; }

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

/* ---------- Type ---------- */

h1, h2, h3, .display {
  font-family: var(--sans);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0;
}
em, .italic { font-style: normal; color: var(--muted); }

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-block;
}

.lede { font-size: clamp(1.05rem, 0.98rem + 0.4vw, 1.3rem); line-height: 1.5; color: var(--ink-2); max-width: 32em; }
.section-title { font-size: clamp(2.25rem, 1.2rem + 4vw, 5.5rem); }

/* ---------- Buttons / links ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 1rem 1.6rem;
  border: 1px solid var(--ink);
  background: var(--ink); color: var(--bg);
  font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer;
  transition: background 0.35s var(--ease), color 0.35s var(--ease);
}
.btn:hover { background: var(--bg); color: var(--ink); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--bg); }
.btn .arrow { transition: transform 0.4s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.link-underline {
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size 0.5s var(--ease);
  padding-bottom: 2px;
}
.link-underline:hover, .link-underline[aria-current="page"] { background-size: 100% 1px; }

/* ---------- Header ---------- */

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), transform 0.5s var(--ease), border-color 0.4s;
}
.site-header.is-scrolled { background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom-color: var(--line); }
.site-header.is-hidden { transform: translateY(-100%); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 4.5rem; }

.logo { font-size: 1.05rem; font-weight: 500; letter-spacing: -0.02em; line-height: 1; }
.logo em { color: var(--muted); font-weight: 400; }

.nav { display: flex; align-items: center; gap: clamp(1.25rem, 2.5vw, 2.5rem); font-size: 0.85rem; }
.nav .btn { padding: 0.65rem 1.05rem; font-size: 0.7rem; }

.nav-toggle { display: none; background: none; border: 0; padding: 0.5rem; cursor: pointer; width: 2.75rem; height: 2.75rem; position: relative; z-index: 60; }
.nav-toggle span { position: absolute; left: 0.6rem; right: 0.6rem; height: 1px; background: var(--ink); transition: transform 0.4s var(--ease), top 0.4s var(--ease); }
.nav-toggle span:nth-child(1) { top: 1.05rem; }
.nav-toggle span:nth-child(2) { top: 1.6rem; }
.nav-open .nav-toggle span:nth-child(1) { top: 1.35rem; transform: rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { top: 1.35rem; transform: rotate(-45deg); }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 0; z-index: 55;
    flex-direction: column; justify-content: center; align-items: flex-start;
    gap: 1rem; padding: var(--gutter);
    background: var(--bg);
    font-size: clamp(2.25rem, 10vw, 3.5rem); letter-spacing: -0.04em;
    opacity: 0; visibility: hidden; transition: opacity 0.4s var(--ease), visibility 0.4s;
  }
  .nav .btn { font-size: 0.8rem; padding: 1rem 1.5rem; margin-top: 1rem; letter-spacing: 0.1em; }
  .nav-open .nav { opacity: 1; visibility: visible; }
  .nav-open { overflow: hidden; }
}

/* ---------- Hero ---------- */

.hero { padding-top: clamp(7.5rem, 15vh, 10rem); padding-bottom: clamp(3rem, 8vw, 6rem); }
.hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: clamp(2rem, 6vw, 6rem); align-items: end; }
.hero h1 { font-size: clamp(2.9rem, 1rem + 6.6vw, 8.5rem); line-height: 0.95; letter-spacing: -0.045em; margin: 1.5rem 0 2rem; }
.hero h1 .indent { display: block; padding-left: 0.8em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2.5rem; }
.hero-media .frame { aspect-ratio: 4 / 5; }
.hero-meta { display: flex; justify-content: space-between; gap: 1rem; margin-top: clamp(3rem, 6vw, 5rem); padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-media { max-width: 26rem; margin-left: auto; width: 82%; }
  .hero-meta { flex-wrap: wrap; }
}

/* ---------- Media frames ---------- */

.frame { overflow: hidden; background: var(--bg-3); position: relative; }
.frame img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.6s var(--ease); }

/* ---------- Sections ---------- */

.section { padding-block: clamp(5rem, 12vw, 10rem); }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; margin-bottom: clamp(3rem, 6vw, 5rem); flex-wrap: wrap; }
.section-head .eyebrow { margin-bottom: 1.25rem; }

/* ---------- Work grid (home) ---------- */

.work-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(2.5rem, 5vw, 5rem) clamp(1rem, 2.5vw, 2.5rem); }
.work-grid .card:nth-child(4n + 1) { grid-column: 1 / span 7; }
.work-grid .card:nth-child(4n + 2) { grid-column: 9 / span 4; margin-top: clamp(4rem, 14vw, 14rem); }
.work-grid .card:nth-child(4n + 3) { grid-column: 2 / span 4; }
.work-grid .card:nth-child(4n + 4) { grid-column: 7 / span 6; margin-top: clamp(2rem, 8vw, 8rem); }
@media (max-width: 760px) {
  .work-grid { grid-template-columns: 1fr 1fr; }
  .work-grid .card:nth-child(n) { grid-column: auto / span 2; margin-top: 0; }
  .work-grid .card:nth-child(4n + 2), .work-grid .card:nth-child(4n + 3) { grid-column: auto / span 1; }
}

.card { display: block; cursor: none; min-width: 0; }
@media (hover: none), (pointer: coarse) { .card { cursor: pointer; } }
.card .frame { aspect-ratio: 4 / 5; }
.card:nth-child(4n + 1) .frame, .card:nth-child(4n + 4) .frame { aspect-ratio: 5 / 4.4; }
.card:hover .frame img { transform: scale(1.025); }
.card-meta { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-top: 1rem; }
.card-title { font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.3rem); letter-spacing: -0.02em; line-height: 1.2; }
.card-title .num { font-size: 0.72rem; letter-spacing: 0.1em; color: var(--muted); margin-right: 0.75rem; }
.card-sub { font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.work-more { display: flex; justify-content: center; margin-top: clamp(4rem, 8vw, 7rem); }

@media (max-width: 760px) {
  .card-meta { flex-direction: column; align-items: flex-start; gap: 0.2rem; }
  .card-sub { white-space: normal; }
}

.cursor {
  position: fixed; left: 0; top: 0; z-index: 90; pointer-events: none;
  width: 4.5rem; height: 4.5rem; margin: -2.25rem 0 0 -2.25rem;
  border-radius: 50%; background: var(--ink); color: var(--bg);
  display: grid; place-items: center;
  font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase;
  transform: scale(0); transition: transform 0.35s var(--ease);
}
.cursor.is-active { transform: scale(1); }
@media (hover: none), (pointer: coarse) { .cursor { display: none; } }

/* ---------- Statement ---------- */

.statement { border-top: 1px solid var(--line); }
.statement blockquote { margin: 2rem 0 0; font-size: clamp(1.9rem, 1rem + 3.4vw, 4.5rem); line-height: 1.08; letter-spacing: -0.04em; max-width: 18em; }
.statement .attribution { margin-top: 2.5rem; font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }

/* ---------- Services ---------- */

.services { border-top: 1px solid var(--ink); }
.service { display: grid; grid-template-columns: 4rem 1fr 1.1fr; gap: 2rem; align-items: baseline; padding: clamp(1.4rem, 2.6vw, 2.2rem) 0; border-bottom: 1px solid var(--line); }
.service .idx { font-size: 0.72rem; color: var(--muted); letter-spacing: 0.1em; }
.service h3 { font-size: clamp(1.5rem, 1rem + 1.8vw, 2.6rem); transition: transform 0.5s var(--ease), color 0.4s; }
.service p { margin: 0; color: var(--ink-2); max-width: 32em; }
.service:hover h3 { transform: translateX(0.5rem); color: var(--muted); }
@media (max-width: 760px) { .service { grid-template-columns: 2.5rem 1fr; } .service p { grid-column: 2; } }

/* ---------- Studio / About ---------- */

.studio { background: var(--bg-2); }
.studio-grid { display: grid; grid-template-columns: 0.85fr 1fr; gap: clamp(2.5rem, 7vw, 7rem); align-items: center; }
.studio-media .frame { aspect-ratio: 4 / 5; }
.studio h2 { font-size: clamp(2rem, 1.2rem + 3vw, 4rem); margin: 1.25rem 0 2rem; }
.studio-copy p { color: var(--ink-2); max-width: 36em; }
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--ink); }
.process h4 { font-weight: 500; font-size: 1rem; letter-spacing: -0.01em; margin: 0.4rem 0 0.4rem; }
.process p { font-size: 0.875rem; margin: 0; color: var(--muted); line-height: 1.5; }
.process .idx { font-size: 0.72rem; color: var(--muted); letter-spacing: 0.12em; }
@media (max-width: 900px) { .studio-grid { grid-template-columns: 1fr; } .studio-media { max-width: 28rem; } .process { grid-template-columns: 1fr 1fr; } }

/* ---------- Contact ---------- */

.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2.5rem, 7vw, 7rem); }
.contact h2 { font-size: clamp(2.5rem, 1.2rem + 4.6vw, 6rem); margin: 1.25rem 0 2rem; }
.contact-details { display: grid; gap: 1.75rem; margin-top: 3rem; }
.contact-details dt { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.25rem; }
.contact-details dd { margin: 0; font-size: 1.2rem; letter-spacing: -0.01em; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }

.form { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem 1.5rem; align-content: start; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.field input, .field select, .field textarea {
  font: inherit; font-size: 1.05rem; color: var(--ink);
  background: transparent; border: 0; border-bottom: 1px solid var(--line);
  padding: 0.6rem 0; border-radius: 0; transition: border-color 0.3s;
  -webkit-appearance: none; appearance: none;
}
.field select { background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23111' fill='none'/%3E%3C/svg%3E") right 0.25rem center no-repeat; padding-right: 1.5rem; cursor: pointer; }
.field textarea { resize: vertical; min-height: 8rem; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-bottom-color: var(--ink); }
.field input::placeholder, .field textarea::placeholder { color: rgba(17, 17, 17, 0.3); }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.4rem; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span { display: inline-block; padding: 0.55rem 1rem; border: 1px solid var(--line); font-size: 0.85rem; cursor: pointer; transition: all 0.3s var(--ease); }
.chip span:hover { border-color: var(--ink); }
.chip input:checked + span { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 2px; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { grid-column: 1 / -1; display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.form-status { font-size: 0.95rem; color: var(--ink-2); }
.form-status.is-error { color: #b3261e; }
.form-status.is-ok { color: var(--ink); }
.form.is-sending .btn { opacity: 0.5; pointer-events: none; }
@media (max-width: 560px) { .form { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */

.site-footer { border-top: 1px solid var(--ink); padding-top: clamp(4rem, 8vw, 7rem); overflow: hidden; }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2rem; padding-bottom: 4rem; }
.footer-top h4 { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); font-weight: 400; margin: 0 0 1rem; }
.footer-top ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.footer-top p { margin: 0; color: var(--ink-2); max-width: 22em; }
.footer-word { font-weight: 400; font-size: calc((100vw - 2 * var(--gutter)) * 0.162); line-height: 1; letter-spacing: -0.06em; white-space: nowrap; margin: 0 0 0.12em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 1.5rem 0; border-top: 1px solid var(--line); font-size: 0.8rem; color: var(--muted); }
@media (max-width: 820px) { .footer-top { grid-template-columns: 1fr 1fr; } .footer-top > :first-child { grid-column: 1 / -1; } }

/* ---------- Work index page ---------- */

.page-hero { padding-top: clamp(8rem, 18vh, 12rem); padding-bottom: clamp(2.5rem, 5vw, 4rem); }
.page-hero h1 { font-size: clamp(3.25rem, 1.2rem + 8.5vw, 10rem); line-height: 0.92; letter-spacing: -0.05em; margin-top: 1.5rem; }
.page-hero .lede { margin-top: 2rem; }

.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.filters button { border: 1px solid var(--line); background: none; padding: 0.55rem 1.1rem; font-size: 0.8rem; cursor: pointer; transition: all 0.3s var(--ease); }
.filters button:hover { border-color: var(--ink); }
.filters button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.filters sup { font-size: 0.65em; margin-left: 0.2em; opacity: 0.6; }

.index-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(2.5rem, 5vw, 4.5rem) clamp(1rem, 2.5vw, 2.5rem); }
.index-grid .card:nth-child(3n + 2) { margin-top: clamp(2rem, 6vw, 6rem); }
.index-grid .card .frame { aspect-ratio: 4 / 5; }
.index-grid .card.is-hidden { display: none; }
@media (max-width: 900px) { .index-grid { grid-template-columns: 1fr 1fr; } .index-grid .card:nth-child(n) { margin-top: 0; } .index-grid .card:nth-child(2n) { margin-top: 3rem; } }
@media (max-width: 560px) { .index-grid { grid-template-columns: 1fr; } .index-grid .card:nth-child(2n) { margin-top: 0; } }

/* ---------- Project page ---------- */

.project-hero { padding-top: clamp(8rem, 18vh, 12rem); }
.project-hero h1 { font-size: clamp(3rem, 1rem + 8vw, 9.5rem); line-height: 0.92; letter-spacing: -0.05em; margin: 1.5rem 0 0; }
.project-facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: clamp(2.5rem, 5vw, 4rem); padding-top: 1.25rem; border-top: 1px solid var(--ink); }
.project-facts dt { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.project-facts dd { margin: 0.35rem 0 0; font-size: 0.95rem; }
@media (max-width: 760px) { .project-facts { grid-template-columns: 1fr 1fr; } }

.project-cover { margin-top: clamp(2.5rem, 5vw, 4rem); }
.project-cover .frame { aspect-ratio: 16 / 9; }
@media (max-width: 760px) { .project-cover .frame { aspect-ratio: 4 / 3.4; } }

.project-text { display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(2rem, 6vw, 6rem); }
.project-text .lede { font-size: clamp(1.3rem, 1rem + 1.2vw, 2rem); line-height: 1.3; letter-spacing: -0.02em; color: var(--ink); }
.project-text p { color: var(--ink-2); }
@media (max-width: 860px) { .project-text { grid-template-columns: 1fr; } }

.gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(1rem, 2.5vw, 2.5rem); }
.gallery figure { margin: 0; }
.gallery figure.is-land { grid-column: span 12; }
.gallery figure.is-land .frame { aspect-ratio: 3 / 2; }
.gallery figure.is-port { grid-column: span 6; }
.gallery figure.is-port .frame { aspect-ratio: 4 / 5; }
.gallery figure.is-solo { grid-column: 4 / span 6; }
.gallery figure.is-offset { margin-top: clamp(3rem, 8vw, 8rem); }
@media (max-width: 600px) { .gallery figure.is-port, .gallery figure.is-solo { grid-column: span 12; } .gallery figure.is-offset { margin-top: 0; } }

.pull { text-align: center; padding-block: clamp(4rem, 10vw, 8rem); }
.pull blockquote { margin: 0 auto; font-size: clamp(1.8rem, 1rem + 3.2vw, 4rem); line-height: 1.1; max-width: 16em; letter-spacing: -0.04em; }

.next-project { display: block; border-top: 1px solid var(--line); padding-block: clamp(4rem, 9vw, 8rem); text-align: center; overflow: hidden; }
.next-project strong { display: block; font-weight: 400; font-size: clamp(2.75rem, 1rem + 7vw, 8.5rem); line-height: 1; letter-spacing: -0.05em; margin-top: 1rem; transition: color 0.4s; }
.next-project:hover strong { color: var(--muted); }

/* ---------- 404 ---------- */

.notfound { min-height: 100svh; display: grid; place-items: center; text-align: center; padding: 8rem var(--gutter) 4rem; }
.notfound h1 { font-size: clamp(4.5rem, 18vw, 14rem); line-height: 0.85; letter-spacing: -0.06em; }
.notfound p { color: var(--ink-2); margin: 1.5rem auto 2.5rem; max-width: 26em; }

/* ---------- Reveal on scroll ---------- */

.reveal { opacity: 0; transform: translateY(1.5rem); transition: opacity 1.2s var(--ease), transform 1.2s var(--ease); transition-delay: var(--d, 0s); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal-img .frame img { transform: scale(1.05); transition: transform 2s var(--ease); }
.reveal-img.is-in .frame img { transform: scale(1); }
.no-js .reveal, .no-js .reveal-img .frame img { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal, .reveal-img .frame img { opacity: 1; transform: none; transition: none; } }

/* Headline line reveal */
.split-line { display: block; overflow: hidden; padding-bottom: 0.08em; margin-bottom: -0.08em; }
.split-line > span { display: inline-block; transform: translateY(105%); transition: transform 1.2s var(--ease); transition-delay: var(--d, 0s); }
.is-loaded .split-line > span, .no-js .split-line > span { transform: none; }
@media (prefers-reduced-motion: reduce) { .split-line > span { transform: none; transition: none; } }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }