/* ========================================================================
   kidane.co.uk — Atelier UI Protocol
   Warm-earth consulting palette, editorial serif + clean sans,
   strict grids, magnetic CTAs, text-reveal, dark-mode aware.
   ======================================================================== */

:root {
  --terracotta: #C67B4B;
  --terracotta-dark: #A5613A;
  --cream: #F5E6D3;
  --olive: #4A6741;
  --brown: #3B2F2F;
  --ink: #1A1512;
  --paper: #FBF6EF;
  --muted: #6B5D52;
  --line: #E4D6C4;

  --bg: var(--paper);
  --fg: var(--ink);
  --card: #ffffff;
  --card-line: var(--line);

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --container: 1200px;
  --pad-section: clamp(64px, 10vw, 140px);
  --radius: 14px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.4s var(--ease);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17120E;
    --fg: #F3E9DC;
    --card: #221A14;
    --card-line: #3A2E24;
    --muted: #B7A794;
    --line: #3A2E24;
    --cream: #241C15;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
.container { max-width: var(--container); margin: 0 auto; padding: 0 clamp(20px, 5vw, 48px); }

/* text-reveal primitive */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }

/* nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem clamp(20px, 5vw, 48px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.nav.is-stuck { border-bottom-color: var(--line); background: color-mix(in srgb, var(--bg) 92%, transparent); }
.nav-logo { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; letter-spacing: -0.02em; }
.nav-logo span { color: var(--terracotta); }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { font-size: 0.9rem; font-weight: 500; color: var(--muted); }
.nav-links a:hover { color: var(--fg); }
.nav-cta { padding: 0.6rem 1.2rem; border-radius: 100px; background: var(--terracotta); color: #fff !important; }
@media (max-width: 720px) { .nav-links a:not(.nav-cta) { display: none; } }

/* hero */
.hero {
  min-height: 100svh; display: grid;
  grid-template-columns: [full-start] minmax(0,1fr) [content-start] minmax(0, var(--container)) [content-end] minmax(0,1fr) [full-end];
  align-items: center;
  background:
    radial-gradient(1200px 600px at 80% -10%, color-mix(in srgb, var(--terracotta) 22%, transparent), transparent),
    radial-gradient(900px 500px at 0% 110%, color-mix(in srgb, var(--olive) 18%, transparent), transparent);
}
.hero-inner {
  grid-column: content;
  padding: 8rem clamp(20px, 5vw, 48px) 4rem;
  display: grid; grid-template-columns: [text] 1.15fr [aside] 0.85fr; gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
@media (max-width: 900px) { .hero-inner { grid-template-columns: 1fr; } }
.hero-eyebrow { display: inline-block; font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--terracotta); font-weight: 600; margin-bottom: 1.4rem; }
.hero h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2.6rem, 6vw, 4.6rem); line-height: 1.02; letter-spacing: -0.02em; margin-bottom: 1.6rem; }
.hero h1 em { font-style: italic; color: var(--terracotta); }
.hero-sub { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--muted); max-width: 42ch; margin-bottom: 2.4rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-aside { display: grid; gap: 1rem; }
.stat { border: 1px solid var(--card-line); border-radius: var(--radius); padding: 1.4rem 1.6rem; background: var(--card); }
.stat b { font-family: var(--font-display); font-size: 2.2rem; display: block; line-height: 1; }
.stat span { font-size: 0.85rem; color: var(--muted); }

/* buttons + magnetic */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.9rem 1.7rem; border-radius: 100px; font-weight: 600; font-size: 0.95rem; will-change: transform; transition: transform 0.2s var(--ease), background 0.3s var(--ease), box-shadow 0.3s var(--ease); }
.btn-primary { background: var(--terracotta); color: #fff; box-shadow: 0 10px 30px -12px var(--terracotta); }
.btn-primary:hover { background: var(--terracotta-dark); }
.btn-ghost { border: 1px solid var(--card-line); color: var(--fg); }
.btn-ghost:hover { border-color: var(--terracotta); color: var(--terracotta); }
.magnetic { display: inline-flex; }

/* section scaffolding */
.section { padding: var(--pad-section) 0; }
.section-head { max-width: 62ch; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-eyebrow { font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--olive); font-weight: 600; }
.section-head h2 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2rem, 4.5vw, 3.2rem); line-height: 1.05; letter-spacing: -0.02em; margin: 0.8rem 0 1rem; }
.section-head p { color: var(--muted); font-size: 1.1rem; }

/* capabilities */
.caps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--card-line); border: 1px solid var(--card-line); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 900px) { .caps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .caps { grid-template-columns: 1fr; } }
.cap { background: var(--card); padding: 2rem 1.6rem; }
.cap h3 { font-family: var(--font-display); font-size: 1.2rem; margin-bottom: 0.6rem; }
.cap p { font-size: 0.92rem; color: var(--muted); }

/* case studies grid */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; }
@media (max-width: 980px) { .cases { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cases { grid-template-columns: 1fr; } }
.case-card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--card-line); border-radius: var(--radius); overflow: hidden; will-change: transform; transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease); }
.case-card:hover { transform: translateY(-6px); box-shadow: 0 24px 50px -24px rgba(0,0,0,0.35); border-color: var(--terracotta); }
.case-thumb { aspect-ratio: 16 / 10; position: relative; overflow: hidden; display: grid; place-items: center; background: transparent; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.case-card:hover .case-thumb img { transform: scale(1.05); }
.case-thumb .thumb-mono { font-family: var(--font-display); font-size: 2.4rem; font-weight: 700; color: color-mix(in srgb, var(--cream) 70%, transparent); letter-spacing: -0.02em; }
.case-tag { position: absolute; top: 12px; left: 12px; z-index: 2; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; padding: 0.3rem 0.7rem; border-radius: 100px; background: color-mix(in srgb, var(--ink) 55%, transparent); color: #fff; backdrop-filter: blur(6px); }
.case-body { padding: 1.5rem 1.5rem 1.6rem; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-family: var(--font-display); font-size: 1.35rem; line-height: 1.15; margin-bottom: 0.5rem; }
.case-body .case-domain { font-size: 0.8rem; color: var(--terracotta); font-weight: 600; margin-bottom: 0.7rem; }
.case-body p { font-size: 0.92rem; color: var(--muted); margin-bottom: 1.2rem; }
.case-link { margin-top: auto; font-weight: 600; font-size: 0.9rem; color: var(--fg); display: inline-flex; gap: 0.4rem; }
.case-link:hover { color: var(--terracotta); gap: 0.7rem; }

/* approach principles */
.principles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--card-line); border: 1px solid var(--card-line); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 900px) { .principles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .principles { grid-template-columns: 1fr; } }
.principle { background: var(--card); padding: 1.8rem 1.4rem; }
.principle b { font-family: var(--font-display); font-size: 1.05rem; display: block; margin-bottom: 0.4rem; }
.principle span { font-size: 0.85rem; color: var(--muted); }

/* cta band */
.cta-band { background: linear-gradient(135deg, var(--brown), var(--ink)); color: var(--cream); border-radius: var(--radius); padding: clamp(2.5rem, 6vw, 4.5rem); text-align: center; }
.cta-band h2 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: 1rem; }
.cta-band p { color: color-mix(in srgb, var(--cream) 80%, transparent); max-width: 48ch; margin: 0 auto 2rem; }

/* footer */
.footer { border-top: 1px solid var(--line); padding: 3rem 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer .nav-logo { font-size: 1.2rem; }
.footer small { color: var(--muted); }

/* case-study detail page */
.cs-hero { padding: 10rem 0 4rem; }
.cs-hero .eyebrow { color: var(--terracotta); font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; font-size: 0.78rem; }
.cs-hero h1 { font-family: var(--font-display); font-size: clamp(2.4rem, 5vw, 3.8rem); line-height: 1.05; margin: 0.8rem 0 1.2rem; letter-spacing: -0.02em; }
.cs-hero p { color: var(--muted); font-size: 1.15rem; max-width: 60ch; }
.cs-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--card-line); border: 1px solid var(--card-line); border-radius: var(--radius); overflow: hidden; margin: 2.5rem 0; }
@media (max-width: 640px) { .cs-meta { grid-template-columns: 1fr; } }
.cs-meta div { background: var(--card); padding: 1.3rem 1.5rem; }
.cs-meta b { display: block; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.3rem; }
.cs-meta span { font-weight: 500; }
.cs-banner { aspect-ratio: 21/9; border-radius: var(--radius); overflow: hidden; background: transparent; display: grid; place-items: center; margin-bottom: 3rem; }
.cs-banner img { width: 100%; height: 100%; object-fit: cover; }
.cs-body { display: grid; grid-template-columns: [main] 1.6fr [side] 0.9fr; gap: clamp(2rem, 5vw, 4rem); }
@media (max-width: 860px) { .cs-body { grid-template-columns: 1fr; } }
.cs-body h2 { font-family: var(--font-display); font-size: 1.7rem; margin: 2rem 0 0.8rem; }
.cs-body h2:first-child { margin-top: 0; }
.cs-body p { color: var(--muted); margin-bottom: 1rem; }
.cs-body ul { color: var(--muted); padding-left: 1.2rem; margin-bottom: 1rem; }
.cs-body li { margin-bottom: 0.4rem; }
.cs-side { position: sticky; top: 6rem; align-self: start; }
.cs-side .card { background: var(--card); border: 1px solid var(--card-line); border-radius: var(--radius); padding: 1.6rem; margin-bottom: 1.2rem; }
.cs-side h3 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 0.8rem; }
.cs-side .stack-tag { display: inline-block; font-size: 0.78rem; padding: 0.3rem 0.7rem; border: 1px solid var(--card-line); border-radius: 100px; margin: 0 0.35rem 0.5rem 0; color: var(--muted); }
.back-link { display: inline-flex; gap: 0.4rem; color: var(--terracotta); font-weight: 600; margin-bottom: 2rem; }