/* ============================================================
   PORTFOLIO — "Ink & Paper" design system
   Display: Fraunces · Body: Inter · Labels: JetBrains Mono
   ============================================================ */

:root {
  --ink: #0f1720;
  --ink-soft: #1a2532;
  --ink-line: rgba(245, 242, 236, 0.14);
  --paper: #f5f2ec;
  --paper-deep: #ece7dc;
  --card: #fffdf9;
  --text: #212b36;
  --muted: #5d6772;
  --muted-dark: #9aa4ad;
  --accent: #a8703a;
  --accent-deep: #8a5a2b;
  --accent-soft: #c89b6a;
  --line: #d9d2c3;
  --line-dark: rgba(245, 242, 236, 0.16);
  --ok: #3e7d5a;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 32, 0.06);
  --shadow-md: 0 10px 30px -12px rgba(15, 23, 32, 0.22);
  --shadow-lg: 0 24px 60px -20px rgba(15, 23, 32, 0.35);
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  --container: 1180px;
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; background: none; border: 0; cursor: pointer; color: inherit; }

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

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

.container { width: min(100% - 48px, var(--container)); margin-inline: auto; }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  background: var(--ink); color: var(--paper);
  padding: 10px 18px; border-radius: 0 0 8px 8px;
  font-size: 14px; transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ---------- Typography helpers ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-deep);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--accent);
}
.on-dark .eyebrow, .eyebrow.light { color: var(--accent-soft); }

h1, h2, h3 { font-family: var(--font-display); font-weight: 560; line-height: 1.12; letter-spacing: -0.015em; }

.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(30px, 4vw, 44px); margin: 18px 0 14px; }
.section-head p { color: var(--muted); font-size: 17px; }
.on-dark .section-head p { color: var(--muted-dark); }

.section { padding: 104px 0; }
.section.tight { padding: 72px 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: transform 0.22s ease, background 0.22s ease, border-color 0.22s ease, color 0.22s ease, box-shadow 0.22s ease;
  white-space: nowrap;
}
.btn svg { transition: transform 0.22s ease; }
.btn:hover svg { transform: translateX(4px); }
.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-ghost { border-color: var(--line); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }

.on-dark .btn-ghost, .btn-ghost.on-dark {
  border-color: var(--line-dark); color: var(--paper);
}
.on-dark .btn-ghost:hover, .btn-ghost.on-dark:hover { border-color: var(--paper); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(15, 23, 32, 0.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.scrolled { border-bottom-color: var(--ink-line); background: rgba(15, 23, 32, 0.94); }

.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; }

.brand { display: flex; align-items: center; gap: 12px; color: var(--paper); }
.brand-mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--accent); color: #fff;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; right: -3px; top: -3px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--ink);
}
.brand-name { font-family: var(--font-display); font-size: 18px; font-weight: 600; letter-spacing: 0.01em; }

.main-nav ul { display: flex; gap: 34px; }
.main-nav a {
  position: relative; color: rgba(245, 242, 236, 0.72);
  font-size: 14.5px; font-weight: 500; padding: 6px 0;
  transition: color 0.2s;
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1.5px; width: 100%;
  background: var(--accent-soft); transform: scaleX(0); transform-origin: left;
  transition: transform 0.28s ease;
}
.main-nav a:hover { color: var(--paper); }
.main-nav a:hover::after { transform: scaleX(1); }

.header-cta { padding: 10px 20px; font-size: 14px; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; padding: 10px; margin-right: -10px;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--paper); border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: calc(var(--header-h) + 84px) 0 96px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(245, 242, 236, 0.075) 1px, transparent 1.4px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 20%, black 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 20%, black 30%, transparent 78%);
}
.hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent) 30%, var(--accent-soft) 50%, transparent);
  opacity: 0.6;
}
.hero-inner { position: relative; max-width: 860px; }

.hero .eyebrow { margin-bottom: 26px; }

.hero h1 {
  font-size: clamp(42px, 6.4vw, 76px);
  font-weight: 520;
  line-height: 1.04;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: italic;
  font-weight: 480;
  color: var(--accent-soft);
}

.hero-sub {
  margin-top: 28px; max-width: 620px;
  font-size: 18.5px; color: rgba(245, 242, 236, 0.72);
}

.hero-actions { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero-meta {
  margin-top: 72px; padding-top: 28px;
  border-top: 1px solid var(--ink-line);
  display: flex; flex-wrap: wrap; gap: 18px 48px;
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.06em;
  color: rgba(245, 242, 236, 0.55);
}
.hero-meta strong { color: rgba(245, 242, 236, 0.9); font-weight: 500; margin-right: 8px; }

/* ---------- Stats strip ---------- */
.stats {
  background: var(--ink-soft); border-top: 1px solid var(--ink-line);
  padding: 34px 0;
}
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.stat { display: flex; align-items: baseline; gap: 14px; }
.stat b {
  font-family: var(--font-display); font-size: 40px; font-weight: 560;
  color: var(--paper); line-height: 1;
}
.stat b sup { font-size: 18px; color: var(--accent-soft); }
.stat span { font-size: 14px; color: var(--muted-dark); max-width: 200px; }

/* ---------- Work ---------- */
.work { background: var(--paper); }

.featured-list { display: grid; gap: 28px; }

.featured-card {
  display: grid; grid-template-columns: 84px 1fr 220px;
  gap: 36px; align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-soft);
}
.featured-num {
  font-family: var(--font-mono); font-size: 14px; color: var(--accent-deep);
  letter-spacing: 0.1em;
}
.featured-card h3 { font-size: 27px; margin-bottom: 8px; }
.featured-card h3 a { transition: color 0.2s; }
.featured-card h3 a:hover { color: var(--accent-deep); }
.featured-card p { color: var(--muted); font-size: 15.5px; max-width: 560px; }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em;
  padding: 5px 11px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
  background: var(--paper);
}

.featured-side { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
}
.status-pill .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.status-live { color: var(--ok); background: rgba(62, 125, 90, 0.1); }
.status-done { color: var(--accent-deep); background: rgba(168, 112, 58, 0.12); }
.status-concept { color: #5b6b8c; background: rgba(91, 107, 140, 0.12); }

.card-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 14.5px; color: var(--accent-deep);
}
.card-link svg { transition: transform 0.22s; }
.card-link:hover svg { transform: translateX(4px); }

/* Concepts grid */
.concepts-head { margin: 72px 0 28px; display: flex; align-items: end; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.concepts-head h3 { font-size: 26px; }
.concepts-note { font-size: 13.5px; color: var(--muted); max-width: 420px; }

.concepts-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.concept-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  display: flex; flex-direction: column; gap: 14px;
  min-height: 260px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
}
.concept-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent-soft); }
.concept-card .status-pill { align-self: flex-start; }
.concept-card h4 { font-family: var(--font-display); font-size: 20px; font-weight: 600; line-height: 1.2; }
.concept-card p { font-size: 14px; color: var(--muted); flex: 1; }
.concept-card .card-link { font-size: 13.5px; }

/* ---------- Capabilities (dark) ---------- */
.capabilities { background: var(--ink); color: var(--paper); }
.capabilities .section-head h2 { color: var(--paper); }

.cap-list { border-top: 1px solid var(--ink-line); }
.cap-row {
  display: grid; grid-template-columns: 72px 1fr 320px; gap: 32px;
  padding: 30px 8px;
  border-bottom: 1px solid var(--ink-line);
  transition: background 0.25s ease, padding-left 0.25s ease;
}
.cap-row:hover { background: rgba(245, 242, 236, 0.035); padding-left: 20px; }
.cap-num { font-family: var(--font-mono); font-size: 13px; color: var(--accent-soft); padding-top: 6px; }
.cap-row h3 { font-size: 23px; color: var(--paper); margin-bottom: 8px; font-weight: 540; }
.cap-row p { color: var(--muted-dark); font-size: 15px; max-width: 560px; }
.cap-tags { display: flex; flex-wrap: wrap; gap: 8px; align-content: start; padding-top: 6px; }
.cap-tags .tag { background: transparent; border-color: var(--ink-line); color: var(--muted-dark); }

/* ---------- Process ---------- */
.process { background: var(--paper-deep); }
.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  counter-reset: step;
}
.step {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 30px 28px;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em;
  color: var(--accent-deep);
  display: block; margin-bottom: 18px;
}
.step h3 { font-size: 19px; margin-bottom: 10px; }
.step p { font-size: 14.5px; color: var(--muted); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 72px; align-items: start; }
.about-copy p { margin-bottom: 18px; color: var(--muted); font-size: 16.5px; }
.about-copy p strong { color: var(--text); }

.principles { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 34px 36px; }
.principles h3 { font-size: 19px; margin-bottom: 20px; }
.principles li {
  display: flex; gap: 14px; padding: 13px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px; color: var(--muted);
}
.principles li:last-child { border-bottom: 0; padding-bottom: 0; }
.principles li b { color: var(--text); font-weight: 600; min-width: 118px; }

.about-cta {
  margin-top: 34px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.about-cta .fine { font-size: 13px; color: var(--muted); }

/* ---------- Contact ---------- */
.contact { background: var(--ink); color: var(--paper); }
.contact .section-head h2 { color: var(--paper); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 72px; align-items: start; }

.contact-info p { color: var(--muted-dark); font-size: 16px; max-width: 400px; margin-bottom: 30px; }
.contact-line {
  display: flex; align-items: center; gap: 14px; padding: 16px 0;
  border-bottom: 1px solid var(--ink-line);
  font-size: 15.5px;
}
.contact-line .ico {
  width: 40px; height: 40px; border-radius: 10px; flex: none;
  border: 1px solid var(--ink-line);
  display: grid; place-items: center; color: var(--accent-soft);
}
.contact-line a:hover { color: var(--accent-soft); }
.contact-line small { display: block; color: var(--muted-dark); font-size: 12.5px; }

.contact-form {
  background: rgba(245, 242, 236, 0.045);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-lg);
  padding: 38px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label {
  display: block; font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted-dark); margin-bottom: 8px;
}
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 16px;
  background: rgba(15, 23, 32, 0.55);
  border: 1px solid var(--ink-line); border-radius: 8px;
  color: var(--paper); font: inherit; font-size: 15px;
  transition: border-color 0.2s, background 0.2s;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(245, 242, 236, 0.35); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent-soft); background: rgba(15, 23, 32, 0.75);
}
.field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--muted-dark); margin-top: 14px; }
.form-status { font-size: 14px; margin-top: 12px; color: var(--accent-soft); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--muted-dark); border-top: 1px solid var(--ink-line); padding: 44px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-inner .brand { color: var(--paper); }
.footer-nav { display: flex; gap: 26px; font-size: 14px; }
.footer-nav a:hover { color: var(--paper); }
.footer-fine { font-size: 12.5px; font-family: var(--font-mono); letter-spacing: 0.04em; }

/* ---------- Case study pages ---------- */
.cs-hero {
  background: var(--ink); color: var(--paper);
  padding: calc(var(--header-h) + 72px) 0 64px;
  position: relative; overflow: hidden;
}
.cs-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(245, 242, 236, 0.06) 1px, transparent 1.4px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse 80% 90% at 30% 0%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 90% at 30% 0%, black 20%, transparent 75%);
}
.cs-hero .container { position: relative; }
.cs-crumb { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-soft); margin-bottom: 22px; display: inline-flex; gap: 10px; align-items: center; }
.cs-hero h1 { font-size: clamp(34px, 5vw, 56px); max-width: 800px; }
.cs-hero .lede { margin-top: 20px; max-width: 660px; font-size: 18px; color: rgba(245, 242, 236, 0.7); }

/* Case-study screenshots */
.cs-figure { margin: 0 0 48px; }
.cs-figure img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: 0 30px 70px -34px rgba(15, 23, 32, 0.45);
}
.cs-figure figcaption {
  margin-top: 14px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.03em; line-height: 1.7;
  color: var(--muted);
}

.cs-meta {
  margin-top: 44px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--ink-line); border: 1px solid var(--ink-line);
  border-radius: var(--radius); overflow: hidden;
}
.cs-meta div { background: var(--ink-soft); padding: 18px 22px; }
.cs-meta dt { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-dark); margin-bottom: 7px; }
.cs-meta dd { font-size: 14.5px; color: var(--paper); }
.cs-meta dd a { color: var(--accent-soft); text-decoration: underline; text-underline-offset: 3px; }

.cs-body { padding: 84px 0; }
.cs-cols { display: grid; grid-template-columns: 220px 1fr; gap: 64px; align-items: start; }

.cs-side {
  position: sticky; top: calc(var(--header-h) + 24px);
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px;
}
.cs-side h3 { font-size: 15px; font-family: var(--font-body); font-weight: 700; letter-spacing: 0.02em; margin-bottom: 14px; }
.cs-side ul li { padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; color: var(--muted); }
.cs-side ul li:last-child { border-bottom: 0; }
.cs-side .stack-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }

.cs-main h2 { font-size: 29px; margin: 52px 0 18px; }
.cs-main h2:first-child { margin-top: 0; }
.cs-main p { color: var(--muted); margin-bottom: 16px; font-size: 16px; }
.cs-main p strong { color: var(--text); }
.cs-main ul.checks { margin: 18px 0 8px; display: grid; gap: 12px; }
.cs-main ul.checks li { display: flex; gap: 14px; font-size: 15.5px; color: var(--muted); }
.cs-main ul.checks li::before {
  content: ""; flex: none; width: 8px; height: 8px; margin-top: 8px;
  background: var(--accent); border-radius: 2px; transform: rotate(45deg);
}

.concept-banner {
  display: flex; gap: 16px; align-items: flex-start;
  background: rgba(91, 107, 140, 0.09);
  border: 1px solid rgba(91, 107, 140, 0.3);
  border-radius: var(--radius); padding: 20px 24px;
  margin-bottom: 40px; font-size: 14.5px; color: #46536e;
}
.concept-banner svg { flex: none; margin-top: 2px; }

/* Schematic wireframe (CSS-drawn, clearly a mockup) */
.wireframe {
  margin: 28px 0 12px;
  border: 1.5px dashed var(--accent-soft);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(var(--paper-deep), var(--paper-deep));
  overflow: hidden;
  font-family: var(--font-mono);
}
.wf-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-bottom: 1.5px dashed var(--accent-soft);
  background: rgba(168, 112, 58, 0.07);
}
.wf-bar i { width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--accent-soft); display: block; }
.wf-bar span { margin-left: 10px; font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-deep); }
.wf-body { display: grid; grid-template-columns: 150px 1fr; min-height: 260px; }
.wf-side { border-right: 1.5px dashed var(--accent-soft); padding: 16px; display: grid; gap: 10px; align-content: start; }
.wf-side i, .wf-block i {
  display: block; height: 10px; border-radius: 3px;
  background: rgba(168, 112, 58, 0.28);
}
.wf-side i:nth-child(2) { width: 70%; }
.wf-side i:nth-child(3) { width: 85%; }
.wf-side i:nth-child(4) { width: 60%; }
.wf-block { padding: 18px; display: grid; gap: 14px; grid-template-rows: auto 1fr; }
.wf-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.wf-kpi { border: 1.5px dashed var(--accent-soft); border-radius: 8px; padding: 12px; display: grid; gap: 7px; }
.wf-kpi i { height: 8px; width: 55%; }
.wf-kpi b { font-size: 15px; color: var(--accent-deep); font-weight: 700; }
.wf-chart { border: 1.5px dashed var(--accent-soft); border-radius: 8px; padding: 14px; position: relative; min-height: 150px; }
.wf-chart::before {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 14px; top: 34px;
  background:
    linear-gradient(to top, rgba(168,112,58,.30) 0 18%, transparent 18%),
    linear-gradient(to top, rgba(168,112,58,.24) 0 34%, transparent 34%),
    linear-gradient(to top, rgba(168,112,58,.34) 0 26%, transparent 26%),
    linear-gradient(to top, rgba(168,112,58,.20) 0 46%, transparent 46%),
    linear-gradient(to top, rgba(168,112,58,.30) 0 38%, transparent 38%);
  background-size: 16% 100%; background-repeat: no-repeat;
  background-position: 4% 100%, 24% 100%, 44% 100%, 64% 100%, 84% 100%;
}
.wf-chart span { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-deep); }
.wf-caption { font-size: 12px; color: var(--muted); font-family: var(--font-mono); margin-top: 10px; }

.cs-nav {
  border-top: 1px solid var(--line);
  padding: 48px 0; background: var(--paper-deep);
}
.cs-nav-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cs-nav a {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 24px 28px; display: block;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
}
.cs-nav a:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent-soft); }
.cs-nav .dir { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 8px; }
.cs-nav .ttl { font-family: var(--font-display); font-size: 19px; font-weight: 600; }
.cs-nav a.next { text-align: right; }

/* ---------- Reveal animation ---------- */
/* Hidden state only when JS is active (html.js is added by main.js);
   without JS all content stays visible. */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal[data-delay="1"] { transition-delay: 0.08s; }
.js .reveal[data-delay="2"] { transition-delay: 0.16s; }
.js .reveal[data-delay="3"] { transition-delay: 0.24s; }
.js .reveal[data-delay="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .featured-card { grid-template-columns: 56px 1fr; }
  .featured-side { grid-column: 2; flex-direction: row; align-items: center; flex-wrap: wrap; }
  .concepts-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-row { grid-template-columns: 56px 1fr; }
  .cap-tags { grid-column: 2; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .cs-cols { grid-template-columns: 1fr; gap: 40px; }
  .cs-side { position: static; }
  .cs-meta { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 40px; }

  .main-nav { position: fixed; inset: var(--header-h) 0 auto 0; background: var(--ink-soft); border-bottom: 1px solid var(--ink-line); padding: 10px 24px 26px; transform: translateY(-12px); opacity: 0; visibility: hidden; transition: all 0.3s ease; }
  .main-nav.open { transform: none; opacity: 1; visibility: visible; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { display: block; padding: 13px 4px; font-size: 16px; border-bottom: 1px solid var(--ink-line); }
  .main-nav a::after { display: none; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }

  .stats-row { grid-template-columns: 1fr; gap: 18px; }
  .stat { flex-direction: row; align-items: baseline; }
  .stat b { font-size: 32px; }

  .featured-card { grid-template-columns: 1fr; gap: 18px; padding: 30px 26px; }
  .featured-num { order: -1; }
  .featured-side { grid-column: 1; }

  .concepts-grid { grid-template-columns: 1fr; }
  .concept-card { min-height: 0; }

  .cap-row { grid-template-columns: 1fr; gap: 10px; padding: 24px 4px; }
  .cap-num { padding-top: 0; }
  .cap-tags { grid-column: 1; }

  .steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 28px 22px; }
  .cs-meta { grid-template-columns: 1fr; }
  .cs-nav-inner { grid-template-columns: 1fr; }
  .cs-nav a.next { text-align: left; }
  .hero { padding-top: calc(var(--header-h) + 56px); padding-bottom: 64px; }
  .hero-meta { gap: 12px 28px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- Print (portfolio pages) ---------- */
@media print {
  .site-header, .main-nav, .nav-toggle, .hero::before, .cs-hero::before { display: none !important; }
  body { background: #fff; color: #111; font-size: 12px; }
  .hero, .cs-hero, .capabilities, .contact { background: #fff !important; color: #111 !important; }
  .hero h1, .cs-hero h1, .section-head h2 { color: #111 !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  a { color: #111 !important; }
  .featured-card, .concept-card, .step, .principles, .cs-side { box-shadow: none !important; border-color: #bbb !important; }
  .section { padding: 24px 0; }
}