/* =========================================================================
   D'Ascanio Mellor Architecture — gallery-white system
   ========================================================================= */

/* ---- Tokens ---- */
:root {
  --color-bg:      oklch(0.992 0 0);
  --color-surface: oklch(0.965 0 0);
  --color-border:  oklch(0.870 0 0);
  --color-ink:     oklch(0.205 0.004 60);
  --color-muted:   oklch(0.505 0.005 60);
  --color-accent:     oklch(0.455 0.100 40);
  --color-accent-ink: oklch(0.380 0.110 40);
  --color-on-accent:  oklch(0.985 0 0);

  --font-display: "Spectral", Georgia, "Times New Roman", serif;
  --font-sans: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;

  --text-2xs: 0.6875rem;
  --text-xs:  0.78rem;
  --text-sm:  0.9rem;
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg:  clamp(1.2rem, 1.1rem + 0.5vw, 1.4rem);
  --text-xl:  clamp(1.6rem, 1.4rem + 1vw, 2.2rem);
  --text-2xl: clamp(2.2rem, 1.8rem + 2vw, 3.4rem);
  --text-3xl: clamp(2.8rem, 2rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 2rem + 6vw, 5.5rem);

  --space-1:.25rem; --space-2:.5rem; --space-3:.75rem; --space-4:1rem;
  --space-6:1.5rem; --space-8:2rem; --space-12:3rem; --space-16:4rem;
  --space-24:6rem; --space-32:8rem; --space-40:10rem;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --maxw: 1240px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 160ms; --dur: 320ms; --dur-slow: 640ms;

  --z-nav: 100; --z-overlay: 300; --z-lightbox: 400;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; color-scheme: light; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
}

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

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

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

/* Skip link — visible only on keyboard focus */
.skip {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  z-index: calc(var(--z-nav) + 1);
  background: var(--color-ink);
  color: var(--color-on-accent);
  font-family: var(--font-sans);
  font-size: var(--text-2xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: var(--space-3) var(--space-4);
  transition: top var(--dur) var(--ease);
}
.skip:focus { top: var(--space-4); }

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
h1 { font-weight: 300; }
p { text-wrap: pretty; }

.eyebrow,
.meta {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--text-2xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.lede {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--text-xl);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  text-wrap: pretty;
}

.prose { max-width: 68ch; }
.prose p + p { margin-top: var(--space-6); }

/* ---- Layout helpers ---- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: clamp(var(--space-24), 12vw, var(--space-40)); }
.section--tight { padding-block: clamp(var(--space-16), 8vw, var(--space-24)); }
.section--surface { background: var(--color-surface); }
.rule { border: 0; border-top: 1px solid var(--color-border); }

/* ---- Links ---- */
.link {
  color: var(--color-accent);
  transition: color var(--dur-fast) var(--ease);
}
.link:hover { color: var(--color-accent-ink); }

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--text-2xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink);
  transition: gap var(--dur) var(--ease), color var(--dur-fast) var(--ease);
}
.arrow-link .arrow { transition: transform var(--dur) var(--ease); }
.arrow-link:hover { color: var(--color-accent); }
.arrow-link:hover .arrow { transform: translateX(6px); }

/* =========================================================================
   Navigation
   ========================================================================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-6) var(--gutter);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              padding var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
  padding-block: var(--space-4);
}
.nav__brand {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-lg);
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--color-ink);
  white-space: nowrap;
}
.nav__brand span { color: var(--color-muted); }
.nav__menu { display: flex; gap: clamp(var(--space-4), 3vw, var(--space-8)); }
.nav__link {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--text-2xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink);
  position: relative;
  padding-block: 2px;
  transition: color var(--dur-fast) var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--color-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--color-accent); }
.nav__link:hover::after { transform: scaleX(1); }

@media (max-width: 640px) {
  .nav { padding-block: var(--space-2); padding-inline: var(--space-4); gap: var(--space-3); align-items: center; }
  .nav.is-scrolled { padding-block: var(--space-2); }
  .nav__brand { font-size: var(--text-sm); }
  .nav__brand span { display: none; }      /* "D'Ascanio Mellor" only — frees room for the menu */
  .nav__menu { gap: var(--space-2); align-items: center; }
  .nav__link { font-size: 0.625rem; letter-spacing: 0.1em; padding: 13px var(--space-2); }
  .nav__link::after { bottom: 8px; left: var(--space-2); width: calc(100% - 2 * var(--space-2)); }
  /* Footer links get a real tap target on touch */
  .footer__meta a { display: inline-block; padding-block: var(--space-2); }
}

/* =========================================================================
   Hero
   ========================================================================= */
.hero { padding-top: clamp(var(--space-32), 22vh, 16rem); }
.hero__inner { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.hero__title {
  font-size: var(--text-hero);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.hero__title em {
  font-style: italic;
  font-weight: 300;
  color: var(--color-accent);
}
.hero__lede {
  margin-top: var(--space-8);
  max-width: 46ch;
}
.hero__figure {
  margin-top: clamp(var(--space-16), 8vw, var(--space-32));
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-surface);
}
.hero__figure img { width: 100%; height: 100%; object-fit: cover; }
.hero__caption {
  margin-top: var(--space-3);
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* =========================================================================
   Section heading block
   ========================================================================= */
.head { display: grid; gap: var(--space-4); margin-bottom: clamp(var(--space-12), 6vw, var(--space-24)); }
.head__title { font-size: var(--text-2xl); }
.head__note { max-width: 52ch; color: var(--color-muted); }

/* =========================================================================
   Work index — alternating editorial rows (no cards)
   ========================================================================= */
.work { display: grid; gap: clamp(var(--space-24), 12vw, var(--space-40)); }
.work__item {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(var(--space-8), 5vw, var(--space-24));
}
.work__item:nth-child(even) { grid-template-columns: 0.85fr 1.15fr; }
.work__item:nth-child(even) .work__media { order: 2; }
.work__item:nth-child(even) .work__body { order: 1; }

.work__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
}
.work__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.work__item:hover .work__media img { transform: scale(1.03); }

.work__index { font-family: var(--font-sans); font-weight: 500; font-size: var(--text-2xs);
  letter-spacing: 0.14em; color: var(--color-accent); }
.work__title { font-size: var(--text-xl); margin-top: var(--space-3); }
.work__meta { margin-top: var(--space-3); display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-4); }
.work__meta span { font-family: var(--font-sans); font-size: var(--text-2xs); letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--color-muted); }
.work__blurb { margin-top: var(--space-6); max-width: 44ch; color: var(--color-ink); }
.work__cta { margin-top: var(--space-8); }

@media (max-width: 820px) {
  .work__item,
  .work__item:nth-child(even) { grid-template-columns: 1fr; gap: var(--space-6); }
  .work__item:nth-child(even) .work__media,
  .work__item:nth-child(even) .work__body { order: 0; }
  .work__media { aspect-ratio: 16 / 10; }
}

/* =========================================================================
   About
   ========================================================================= */
.about { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(var(--space-12), 8vw, var(--space-32)); align-items: start; }
.about__title { font-size: var(--text-2xl); }
.about__list { margin-top: var(--space-12); display: grid; gap: 0; }
.about__row {
  display: grid; grid-template-columns: auto 1fr; gap: var(--space-6);
  padding-block: var(--space-4); border-top: 1px solid var(--color-border);
}
.about__row:last-child { border-bottom: 1px solid var(--color-border); }
.about__row dt { font-family: var(--font-sans); font-weight: 500; font-size: var(--text-2xs);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-muted); }
.about__row dd { color: var(--color-ink); }
@media (max-width: 820px) {
  .about { grid-template-columns: 1fr; }
  .about__row { grid-template-columns: 1fr; gap: var(--space-1); }
}

/* =========================================================================
   Contact
   ========================================================================= */
.contact { text-align: center; }
.contact__title { font-size: var(--text-3xl); font-weight: 300; }
.contact__lede { margin: var(--space-6) auto 0; max-width: 44ch; color: var(--color-muted); }
.contact__links {
  margin-top: clamp(var(--space-12), 6vw, var(--space-16));
  display: flex; flex-direction: column; gap: var(--space-4);
  align-items: center;
}
.contact__link {
  font-family: var(--font-display); font-weight: 300;
  font-size: var(--text-xl); letter-spacing: -0.01em;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 4px;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.contact__link:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* =========================================================================
   Footer
   ========================================================================= */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12);
}
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-6); align-items: baseline; }
.footer__brand { font-family: var(--font-display); font-size: var(--text-lg); }
.footer__meta { font-size: var(--text-2xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-muted); }
.footer__meta a:hover { color: var(--color-accent); }

/* =========================================================================
   Project page
   ========================================================================= */
.proj-hero { padding-top: clamp(var(--space-32), 22vh, 15rem); }
.proj-hero__inner { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.proj-back { display: inline-flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-12);
  font-family: var(--font-sans); font-weight: 500; font-size: var(--text-2xs); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-muted); transition: color var(--dur-fast) var(--ease); }
.proj-back:hover { color: var(--color-accent); }
.proj-title { font-size: var(--text-3xl); font-weight: 300; max-width: 18ch; }
.proj-spec {
  margin-top: clamp(var(--space-12), 6vw, var(--space-16));
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-8); border-top: 1px solid var(--color-border); padding-top: var(--space-8);
}
.proj-spec dt { font-family: var(--font-sans); font-weight: 500; font-size: var(--text-2xs);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-muted); margin-bottom: var(--space-2); }
.proj-spec dd { font-family: var(--font-display); font-size: var(--text-lg); }

.proj-lead { margin-top: clamp(var(--space-16), 8vw, var(--space-24)); width: 100%; aspect-ratio: 3 / 2;
  overflow: hidden; background: var(--color-surface); }
.proj-lead img { width: 100%; height: 100%; object-fit: cover; }

/* Portrait lead — a tall detail shot shown in full, centred like a plate on the wall */
.proj-lead--portrait {
  aspect-ratio: auto;
  height: auto;
  overflow: visible;
  display: flex;
  justify-content: center;
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
  padding-inline: var(--gutter);
}
.proj-lead--portrait img {
  width: auto;
  height: auto;
  max-width: min(100%, 540px);
  max-height: min(80vh, 780px);
  object-fit: contain;
}

.proj-narr { display: grid; grid-template-columns: 1fr 2fr; gap: clamp(var(--space-8), 6vw, var(--space-24)); }
.proj-narr__kicker { font-family: var(--font-sans); font-weight: 500; font-size: var(--text-2xs);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-accent); }
.proj-narr__body { max-width: 68ch; }
.proj-narr__body p { font-size: var(--text-lg); line-height: 1.55; }
.proj-narr__body p + p { margin-top: var(--space-6); }
@media (max-width: 820px) { .proj-narr { grid-template-columns: 1fr; gap: var(--space-4); } }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(var(--space-4), 2vw, var(--space-8)); }
.gallery figure { overflow: hidden; background: var(--color-surface); margin: 0; }
.gallery img { width: 100%; height: 100%; object-fit: cover; }
.g-span-12 { grid-column: span 12; }
.g-span-8 { grid-column: span 8; }
.g-span-6 { grid-column: span 6; }
.g-span-4 { grid-column: span 4; }
.g-tall { aspect-ratio: 3 / 4; }
.g-wide { aspect-ratio: 16 / 9; }
.g-sq { aspect-ratio: 1 / 1; }
.g-43 { aspect-ratio: 4 / 3; }
figcaption { margin-top: var(--space-3); font-family: var(--font-sans); font-size: var(--text-2xs);
  letter-spacing: 0.06em; color: var(--color-muted); }
@media (max-width: 820px) {
  .gallery { grid-template-columns: repeat(6, 1fr); }
  .g-span-8, .g-span-6, .g-span-4 { grid-column: span 6; }
  .g-tall, .g-43, .g-sq { aspect-ratio: 4 / 3; }
}

/* Drawings band */
.drawings { background: var(--color-surface); }
.drawings .gallery figure { background: var(--color-bg); border: 1px solid var(--color-border); }
.drawings .gallery img { object-fit: contain; }

/* Next project */
.next-proj { border-top: 1px solid var(--color-border); }
.next-proj a { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: var(--space-4); padding-block: clamp(var(--space-12), 6vw, var(--space-16)); }
.next-proj__label { font-family: var(--font-sans); font-weight: 500; font-size: var(--text-2xs);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-muted); }
.next-proj__title { font-family: var(--font-display); font-weight: 300; font-size: var(--text-2xl);
  transition: color var(--dur-fast) var(--ease); }
.next-proj a:hover .next-proj__title { color: var(--color-accent); }

/* =========================================================================
   Scroll reveal — content visible by default, enhanced when JS present
   ========================================================================= */
.reveal { opacity: 1; }
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity var(--dur-slow) var(--ease),
  transform var(--dur-slow) var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}