/* ============================================================
   Northbound Studio — Design System
   Editorial · minimal · serif display + sans body · dual theme
   ============================================================ */

:root {
  --font-display: ui-serif, Georgia, "Iowan Old Style", "Apple Garamond", "Times New Roman", serif;
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, monospace;

  --bg: #111014;
  --bg-elev: #19181e;
  --bg-elev-2: #211f27;
  --text: #efeae1;
  --text-muted: #9a958c;
  --text-faint: #6b6760;
  --border: #2a2830;
  --border-soft: #221f27;
  --accent: #c9794e;
  --accent-soft: #d99a6f;
  --accent-dim: rgba(201, 121, 78, 0.14);
  --success: #7fb069;
  --ring: rgba(201, 121, 78, 0.4);

  --container: 1200px;
  --container-narrow: 760px;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 18px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 8px 30px rgba(0,0,0,0.28);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.4);

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

[data-theme="light"] {
  --bg: #f6f2ec;
  --bg-elev: #ffffff;
  --bg-elev-2: #f0ebe3;
  --text: #1c1a1f;
  --text-muted: #5f5b54;
  --text-faint: #94908a;
  --border: #e3ddd2;
  --border-soft: #ece7dd;
  --accent: #b85f33;
  --accent-soft: #c9794e;
  --accent-dim: rgba(184, 95, 51, 0.1);
  --success: #5a8a45;
  --ring: rgba(184, 95, 51, 0.32);
  --shadow-sm: 0 1px 2px rgba(40,30,20,0.06);
  --shadow: 0 8px 30px rgba(40,30,20,0.08);
  --shadow-lg: 0 24px 60px rgba(40,30,20,0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
*::selection { background: var(--accent-dim); color: var(--text); }

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; line-height: 1.12; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); }
h3 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); }
h4 { font-size: 1.2rem; }
p { color: var(--text-muted); }
.lead { font-size: clamp(1.1rem, 2vw, 1.35rem); line-height: 1.6; color: var(--text); font-weight: 400; }
.serif { font-family: var(--font-display); }
.mono { font-family: var(--font-mono); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent); opacity: 0.6; }
.eyebrow.center::before { display: none; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 clamp(1.2rem, 4vw, 2.5rem); }
.container-narrow { max-width: var(--container-narrow); }
.section { padding: clamp(4.5rem, 10vw, 8rem) 0; }
.section-sm { padding: clamp(3rem, 6vw, 5rem) 0; }
.section-divider { border-top: 1px solid var(--border-soft); }
.grid { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); }
.flex { display: flex; }
.center { text-align: center; }
.mt-1 { margin-top: 0.6rem; } .mt-2 { margin-top: 1.2rem; } .mt-3 { margin-top: 2rem; } .mt-4 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.6rem; } .mb-2 { margin-bottom: 1.2rem; } .mb-3 { margin-bottom: 2rem; }
.text-muted { color: var(--text-muted); }
.text-faint { color: var(--text-faint); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom-color: var(--border-soft);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-size: 1.3rem; font-weight: 500; letter-spacing: -0.01em; }
.brand-mark { width: 28px; height: 28px; flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { font-size: 0.92rem; color: var(--text-muted); transition: color 0.2s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--accent); border-radius: 2px; }
.nav-actions { display: flex; align-items: center; gap: 1rem; }

.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  border: 1px solid var(--border); color: var(--text-muted); transition: all 0.25s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); background: var(--accent-dim); }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.nav-toggle { display: none; width: 38px; height: 38px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.nav-toggle span { width: 20px; height: 1.5px; background: var(--text); transition: transform 0.3s var(--ease), opacity 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.93rem; font-weight: 500; padding: 0.85rem 1.5rem;
  border-radius: 100px; transition: all 0.25s var(--ease); white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-soft); transform: translateY(-2px); box-shadow: 0 10px 24px var(--accent-dim); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.85rem; }
.btn .arrow { transition: transform 0.25s; }
.btn:hover .arrow { transform: translateX(3px); }
.link-arrow { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--accent); font-size: 0.9rem; font-weight: 500; }
.link-arrow .arrow { transition: transform 0.25s; }
.link-arrow:hover .arrow { transform: translateX(3px); }

/* ---------- Hero ---------- */
.hero { position: relative; padding-top: clamp(9rem, 18vh, 13rem); padding-bottom: clamp(4rem, 9vw, 7rem); overflow: hidden; }
.hero-grain { position: absolute; inset: 0; opacity: 0.4; pointer-events: none;
  background-image: radial-gradient(circle at 1px 1px, var(--border) 1px, transparent 0); background-size: 32px 32px; mask-image: radial-gradient(ellipse at top, #000 30%, transparent 70%); }
.hero-glow { position: absolute; top: -10%; right: -5%; width: 50vw; height: 50vw; max-width: 700px; max-height: 700px;
  background: radial-gradient(circle, var(--accent-dim), transparent 60%); filter: blur(40px); pointer-events: none; }
.hero h1 { max-width: 16ch; }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero-sub { max-width: 52ch; margin-top: 1.5rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; }

/* ---------- Stats / marquee ---------- */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; padding: 2.5rem 0; border-block: 1px solid var(--border-soft); }
.stat .num { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem); font-weight: 500; color: var(--text); }
.stat .num .plus { color: var(--accent); }
.stat .label { font-size: 0.82rem; color: var(--text-faint); margin-top: 0.3rem; letter-spacing: 0.02em; }

.marquee { overflow: hidden; border-block: 1px solid var(--border-soft); padding: 1.4rem 0; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; gap: 3.5rem; width: max-content; animation: marquee 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee .client { font-family: var(--font-display); font-size: 1.15rem; color: var(--text-faint); white-space: nowrap; letter-spacing: 0.01em; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Section heading ---------- */
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); flex-wrap: wrap; }
.section-head .title-block { max-width: 26ch; }
.section-head h2 { margin-top: 1rem; }
.section-head .desc { max-width: 38ch; }

/* ---------- Project cards ---------- */
.work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1.5rem, 3vw, 2.5rem); }
.project-card { display: block; border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-elev); border: 1px solid var(--border-soft); transition: transform 0.4s var(--ease), border-color 0.3s, box-shadow 0.4s; }
.project-card:hover { transform: translateY(-4px); border-color: var(--border); box-shadow: var(--shadow); }
.project-thumb { aspect-ratio: 16/10; position: relative; overflow: hidden; background: var(--bg-elev-2); }
.project-thumb svg { width: 100%; height: 100%; transition: transform 0.6s var(--ease); }
.project-card:hover .project-thumb svg { transform: scale(1.04); }
.project-tag { position: absolute; top: 1rem; left: 1rem; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.35rem 0.7rem; border-radius: 100px; background: color-mix(in srgb, var(--bg) 70%, transparent); backdrop-filter: blur(8px); color: var(--text); }
.project-body { padding: 1.5rem 1.6rem 1.8rem; }
.project-body h3 { font-size: 1.4rem; margin-bottom: 0.4rem; }
.project-meta { display: flex; gap: 0.8rem; flex-wrap: wrap; font-size: 0.82rem; color: var(--text-faint); }
.project-meta span { display: inline-flex; align-items: center; gap: 0.4rem; }
.project-meta span + span::before { content: "·"; margin-right: 0.4rem; color: var(--text-faint); }

/* ---------- Filter bar ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 2.5rem; }
.filter-chip { padding: 0.5rem 1.1rem; border-radius: 100px; border: 1px solid var(--border); font-size: 0.85rem; color: var(--text-muted); transition: all 0.2s; }
.filter-chip:hover { color: var(--text); border-color: var(--text-faint); }
.filter-chip.active { background: var(--text); color: var(--bg); border-color: var(--text); }

/* ---------- Service list ---------- */
.service-row { display: grid; grid-template-columns: 0.4fr 1fr auto; gap: 2rem; align-items: start; padding: clamp(2rem, 4vw, 3rem) 0; border-top: 1px solid var(--border-soft); transition: padding-left 0.3s var(--ease); }
.service-row:hover { padding-left: 0.8rem; }
.service-row:last-child { border-bottom: 1px solid var(--border-soft); }
.service-num { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); padding-top: 0.4rem; }
.service-title h3 { font-size: clamp(1.5rem, 2.6vw, 2rem); margin-bottom: 0.6rem; }
.service-title p { max-width: 56ch; }
.service-items { display: flex; gap: 0.5rem; flex-wrap: wrap; padding-top: 0.5rem; }
.pill { font-size: 0.78rem; padding: 0.3rem 0.7rem; border-radius: 100px; background: var(--bg-elev); border: 1px solid var(--border-soft); color: var(--text-muted); }

/* ---------- Process steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; counter-reset: step; }
.step { position: relative; padding-top: 2rem; }
.step::before { counter-increment: step; content: "0" counter(step); font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); position: absolute; top: 0; left: 0; }
.step::after { content: ""; position: absolute; top: 0.35rem; left: 2.5rem; right: 0; height: 1px; background: var(--border); }
.step:last-child::after { display: none; }
.step h4 { font-family: var(--font-sans); font-weight: 600; font-size: 1.05rem; margin: 0.8rem 0 0.4rem; }
.step p { font-size: 0.9rem; }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.5rem, 3vw, 2rem); }
.team-card { text-align: left; }
.team-avatar { width: 100%; aspect-ratio: 1; border-radius: var(--radius); overflow: hidden; background: var(--bg-elev-2); margin-bottom: 1rem; border: 1px solid var(--border-soft); }
.team-avatar svg { width: 100%; height: 100%; }
.team-name { font-family: var(--font-sans); font-weight: 600; font-size: 1.05rem; }
.team-role { font-size: 0.85rem; color: var(--accent); margin: 0.1rem 0 0.5rem; }
.team-bio { font-size: 0.86rem; color: var(--text-muted); line-height: 1.5; }

/* ---------- Article cards ---------- */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 3vw, 2.5rem); }
.article-card { display: block; transition: transform 0.3s var(--ease); }
.article-card:hover { transform: translateY(-3px); }
.article-card .a-thumb { aspect-ratio: 16/9; border-radius: var(--radius); overflow: hidden; background: var(--bg-elev-2); border: 1px solid var(--border-soft); margin-bottom: 1.2rem; }
.article-card .a-thumb svg { width: 100%; height: 100%; }
.article-meta { font-size: 0.78rem; color: var(--text-faint); display: flex; gap: 0.7rem; margin-bottom: 0.5rem; }
.article-card h3 { font-size: 1.25rem; margin-bottom: 0.4rem; transition: color 0.2s; }
.article-card:hover h3 { color: var(--accent); }
.article-card p { font-size: 0.9rem; }

/* ---------- Testimonials ---------- */
.quote-block { font-family: var(--font-display); font-size: clamp(1.4rem, 3vw, 2.1rem); line-height: 1.4; letter-spacing: -0.01em; max-width: 22ch; color: var(--text); }
.quote-mark { font-size: 3rem; color: var(--accent); line-height: 0.6; display: block; margin-bottom: 1rem; font-family: var(--font-display); }
.quote-author { margin-top: 1.5rem; font-family: var(--font-sans); font-size: 0.95rem; }
.quote-author .name { font-weight: 600; color: var(--text); }
.quote-author .role { color: var(--text-faint); font-size: 0.85rem; }

/* ---------- Prose (case study / article body) ---------- */
.prose { max-width: var(--container-narrow); margin: 0 auto; }
.prose h2 { margin: 3rem 0 1rem; }
.prose h3 { margin: 2.2rem 0 0.8rem; font-family: var(--font-sans); font-weight: 600; font-size: 1.2rem; }
.prose p { font-size: 1.08rem; line-height: 1.75; margin-bottom: 1.3rem; color: var(--text-muted); }
.prose p:first-of-type { font-size: 1.25rem; color: var(--text); line-height: 1.6; }
.prose strong { color: var(--text); font-weight: 600; }
.prose ul { margin: 0 0 1.3rem 0; }
.prose ul li { position: relative; padding-left: 1.5rem; margin-bottom: 0.6rem; color: var(--text-muted); }
.prose ul li::before { content: ""; position: absolute; left: 0; top: 0.7em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.prose blockquote { border-left: 2px solid var(--accent); padding: 0.3rem 0 0.3rem 1.5rem; margin: 2rem 0; font-family: var(--font-display); font-size: 1.3rem; color: var(--text); font-style: italic; }
.prose .figure { margin: 2.5rem 0; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-soft); background: var(--bg-elev-2); }
.prose .figure svg { width: 100%; }
.prose .figure figcaption { padding: 0.9rem 1.2rem; font-size: 0.82rem; color: var(--text-faint); }

/* ---------- Case study meta / results ---------- */
.case-hero { padding-top: clamp(9rem, 16vh, 11rem); padding-bottom: 3rem; }
.case-meta-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--border-soft); }
.case-meta-grid .label { font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 0.3rem; }
.case-meta-grid .value { font-family: var(--font-display); font-size: 1.1rem; color: var(--text); }
.results-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 2rem 0; }
.result-card { padding: 1.8rem; border-radius: var(--radius); background: var(--bg-elev); border: 1px solid var(--border-soft); }
.result-card .big { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 2.8rem); color: var(--accent); line-height: 1; }
.result-card .desc { font-size: 0.88rem; margin-top: 0.6rem; }
.next-case { display: flex; align-items: center; justify-content: space-between; padding: clamp(2.5rem, 5vw, 4rem) 0; border-top: 1px solid var(--border-soft); }

/* ---------- Contact form ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 0.82rem; color: var(--text-muted); font-weight: 500; }
.field input, .field textarea, .field select {
  font: inherit; color: var(--text); background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.85rem 1rem; transition: border-color 0.2s, box-shadow 0.2s;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--ring); }
.field .err { font-size: 0.78rem; color: #e57373; display: none; }
.field.invalid .err { display: block; }
.field.invalid input, .field.invalid textarea { border-color: #e57373; }
.form-note { font-size: 0.8rem; color: var(--text-faint); margin-top: 1rem; }
.form-success { display: none; padding: 1rem 1.2rem; border-radius: var(--radius-sm); background: var(--accent-dim); border: 1px solid var(--accent); color: var(--text); font-size: 0.9rem; margin-top: 1rem; }
.form-success.show { display: block; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--border-soft); }
.faq-q { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1.5rem 0; width: 100%; text-align: left; font-family: var(--font-sans); font-weight: 500; font-size: 1.05rem; color: var(--text); }
.faq-q .icon { flex-shrink: 0; width: 20px; height: 20px; position: relative; transition: transform 0.3s; }
.faq-q .icon::before, .faq-q .icon::after { content: ""; position: absolute; background: var(--accent); border-radius: 2px; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.faq-q .icon::before { width: 12px; height: 1.5px; }
.faq-q .icon::after { width: 1.5px; height: 12px; transition: transform 0.3s; }
.faq-item.open .icon::after { transform: translate(-50%,-50%) rotate(90deg); opacity: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s var(--ease); }
.faq-item.open .faq-a { max-height: 300px; }
.faq-a p { padding-bottom: 1.5rem; font-size: 0.95rem; }

/* ---------- CTA band ---------- */
.cta-band { text-align: center; padding: clamp(4rem, 8vw, 6.5rem) 0; border-radius: var(--radius-lg); background: var(--bg-elev); border: 1px solid var(--border-soft); position: relative; overflow: hidden; }
.cta-band .hero-glow { opacity: 0.7; }
.cta-band h2 { margin-bottom: 1rem; }
.cta-band p { max-width: 48ch; margin: 0 auto 2rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border-soft); padding: clamp(3.5rem, 7vw, 5rem) 0 2rem; margin-top: clamp(4rem, 8vw, 7rem); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 3rem; }
.footer-brand p { font-size: 0.9rem; max-width: 30ch; margin-top: 1rem; }
.footer-col h5 { font-family: var(--font-sans); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 1.1rem; font-weight: 600; }
.footer-col a { display: block; font-size: 0.92rem; color: var(--text-muted); padding: 0.3rem 0; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 2rem; border-top: 1px solid var(--border-soft); font-size: 0.82rem; color: var(--text-faint); flex-wrap: wrap; gap: 1rem; }
.footer-social { display: flex; gap: 0.8rem; }
.footer-social a { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--border); display: grid; place-items: center; color: var(--text-muted); transition: all 0.2s; }
.footer-social a:hover { color: var(--accent); border-color: var(--accent); }
.footer-social svg { width: 15px; height: 15px; }

/* ---------- Page header (inner pages) ---------- */
.page-head { padding-top: clamp(9rem, 16vh, 12rem); padding-bottom: 2rem; }
.breadcrumb { display: flex; gap: 0.5rem; font-size: 0.82rem; color: var(--text-faint); margin-bottom: 1.5rem; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span.sep { opacity: 0.5; }

/* ---------- 404 ---------- */
.notfound { min-height: 80vh; display: grid; place-items: center; text-align: center; }
.notfound .big-num { font-family: var(--font-display); font-size: clamp(6rem, 18vw, 12rem); line-height: 1; color: var(--accent); }

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal-delay="3"] { transition-delay: 0.24s; }

/* ---------- Lightbox ---------- */
.lightbox { position: fixed; inset: 0; z-index: 200; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); display: none; place-items: center; padding: 5vh 5vw; opacity: 0; transition: opacity 0.3s; }
.lightbox.show { display: grid; opacity: 1; }
.lightbox img, .lightbox svg.show { max-width: 90vw; max-height: 86vh; border-radius: var(--radius-lg); }
.lightbox-close { position: absolute; top: 2vh; right: 3vw; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border); color: var(--text); font-size: 1.3rem; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .service-row { grid-template-columns: 1fr; gap: 0.8rem; }
  .service-row:hover { padding-left: 0; }
  .case-meta-grid { grid-template-columns: repeat(2, 1fr); }
  .results-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { position: fixed; inset: 72px 0 auto 0; background: var(--bg); flex-direction: column; align-items: flex-start; padding: 1.5rem clamp(1.2rem,4vw,2.5rem) 2.5rem; gap: 0.4rem; border-bottom: 1px solid var(--border); transform: translateY(-120%); transition: transform 0.4s var(--ease); box-shadow: var(--shadow-lg); }
  .nav-links.open { transform: none; }
  .nav-links a { width: 100%; padding: 0.7rem 0; font-size: 1.1rem; }
  .nav-links a.active::after { display: none; }
  .nav-toggle { display: flex; }
  .work-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { flex: 1; justify-content: center; }
}

@media (max-width: 520px) {
  .team-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; }
}