/* ============================================================
   ESTAY DYNAMICS — design tokens (theme: Copper & Slate)
   Warm slate ground, copper accent, a fine serif for display and
   a neutral sans for reading. Mono is reserved for data and figure
   numbers. All text/background pairs meet WCAG AA (>= 4.5:1).
   ============================================================ */

:root {
  /* color */
  --bg: #1b2026;
  --bg-deep: #161a1f;
  --bg-panel: #232a31;
  --bg-panel-raised: #2a323a;
  --line: #36404a;
  --line-strong: #4a5560;
  --ink: #d2cdc6;
  --ink-dim: #b8b3ac;
  --ink-faint: #9aa1a8;
  --amber: #d08a57;   /* copper: primary accent */
  --cyan: #e3b48f;    /* light copper: secondary accent */
  --white: #f3efe9;

  /* type */
  --f-display: 'Instrument Serif', Georgia, serif;
  --f-body: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  --f-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* layout */
  --gutter: clamp(16px, 5vw, 64px);
  --maxw: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.12;
  margin: 0;
  color: var(--white);
}

p { margin: 0 0 1em; color: var(--ink-dim); }
p:last-child { margin-bottom: 0; }

/* keyboard focus — visible on every interactive element */
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -60px;
  z-index: 100;
  background: var(--amber);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  padding: 10px 14px;
}
.skip-link:focus { top: 12px; }
main { display: block; }

.mono { font-family: var(--f-mono); }

/* small uppercase label above headings */
.eyebrow {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ============ layout shell ============ */
.wrap {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.panel {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-panel);
  padding: 32px;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border: 1px solid var(--line-strong);
  padding: 4px 9px;
}

/* ============ nav ============ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(27, 32, 38, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--white);
}
.brand-logo { display: block; height: 34px; width: auto; }
@media (max-width: 520px) { .brand-logo { height: 30px; } }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 0.92rem;
}
.nav-links a {
  text-decoration: none;
  color: var(--ink-faint);
  padding: 10px 13px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a.active { border-color: var(--amber); }
.nav-links a.nav-cta { margin-left: 12px; color: var(--white); border: 1px solid var(--amber); }
.nav-links a.nav-cta:hover { background: var(--amber); color: var(--bg); }
.nav-toggle { display: none; }

@media (max-width: 880px) {
  /* absolute, not fixed: the nav's backdrop-filter makes it the containing
     block, so the menu is positioned relative to the nav bar either way */
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: calc(100vh - 72px);
    height: calc(100dvh - 72px);
    overflow-y: auto;
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    padding: 12px var(--gutter);
    display: none;
    border-top: 1px solid var(--line);
    font-size: 1.05rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 16px 4px; border-bottom: 1px solid var(--line); }
  .nav-links a.active { border-color: var(--line); color: var(--cyan); }
  .nav-links a.nav-cta { margin: 20px 0 0; text-align: center; background: var(--amber); color: var(--bg); }
  .nav-toggle {
    display: block;
    min-height: 44px;
    background: none;
    border: 1px solid var(--line-strong);
    color: var(--white);
    font-family: var(--f-body);
    font-size: 0.9rem;
    padding: 8px 14px;
  }
}

/* ============ buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  font-family: var(--f-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 13px 24px;
  border: 1px solid var(--amber);
  color: var(--bg);
  background: var(--amber);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:hover { background: var(--cyan); border-color: var(--cyan); color: var(--bg); }
.btn:focus-visible { outline-color: var(--white); }

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--line-strong);
  font-weight: 500;
}
.btn-ghost:hover { background: transparent; border-color: var(--cyan); color: var(--cyan); }

/* ============ sections ============ */
section { position: relative; padding: 88px 0; }
section.tight { padding: 56px 0; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(2rem, 3.6vw, 2.8rem); }
.figno {
  font-family: var(--f-mono);
  font-size: 0.76rem;
  color: var(--ink-faint);
}

/* ============ hero ============ */
.hero { padding-top: 72px; padding-bottom: 48px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 64px;
  align-items: center;
}
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 48px; } }
.hero h1 {
  font-size: clamp(2.6rem, 5.2vw, 4.1rem);
  line-height: 1.03;
  margin: 18px 0 24px;
}
.hero .lede { font-size: 1.12rem; max-width: 48ch; margin-bottom: 32px; color: var(--ink); }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* ============ grid / cards ============ */
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
@media (max-width: 800px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.cell {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  padding: 30px 28px;
}
.cell h3 { font-size: 1.55rem; margin-bottom: 12px; }
a.cell { display: block; text-decoration: none; transition: background 0.15s ease, border-color 0.15s ease; }
a.cell:hover { background: var(--bg-panel-raised); border-color: var(--amber); }
a.cell:hover h3 { color: var(--cyan); }
.cell .num {
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  display: block;
  margin-bottom: 14px;
}

/* ============ stat strip ============ */
.stat-strip {
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat {
  flex: 1 1 200px;
  padding: 24px 28px;
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: none; }
.stat .v { font-family: var(--f-display); color: var(--white); font-size: 1.8rem; display: block; }
.stat .l { font-size: 0.74rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); }

/* ============ service block ============ */
.service-block {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 48px;
  padding: 48px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}
.service-block:last-child { border-bottom: 1px solid var(--line); }
@media (max-width: 800px) { .service-block { grid-template-columns: 1fr; gap: 18px; } }
.service-block h3 { font-size: 1.9rem; margin-bottom: 8px; }
.service-block .sublabel { color: var(--cyan); font-size: 0.78rem !important; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; }
.spec-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 20px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.spec-row:first-of-type { border-top: none; }
.spec-row dt {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0;
  padding-top: 3px;
}
.spec-row dd { margin: 0; color: var(--ink); }

/* ============ case study ============ */
.case {
  border: 1px solid var(--line);
  background: var(--bg-panel);
  margin-bottom: 24px;
}
.case-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 10px;
}
.case-head h3 { font-size: 1.6rem; }
.case-body { padding: 28px; }
.case-body .spec-row dt { width: 160px; }

.disclaimer {
  font-size: 0.9rem;
  color: var(--ink-faint);
  border-left: 2px solid var(--amber);
  padding: 4px 0 4px 16px;
  margin-top: 36px;
}

/* ============ about ============ */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 56px;
}
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }
.credential-list { list-style: none; margin: 0; padding: 0; }
.credential-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 0.96rem;
  color: var(--ink);
}
.credential-list li:first-child { border-top: none; }
.credential-list b { display: block; font-size: 0.74rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan); margin-bottom: 4px; }

/* ============ contact ============ */
.contact-panel { max-width: 680px; }
.contact-line {
  display: flex;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  gap: 16px;
  flex-wrap: wrap;
}
.contact-line:first-child { border-top: none; }
.contact-line dt { font-size: 0.76rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); }
.contact-line dd { margin: 0; }

/* ============ footer ============ */
footer { border-top: 1px solid var(--line); background: var(--bg-deep); padding: 64px 0 32px; }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 32px;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h2 { font-family: var(--f-body); font-size: 0.76rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { color: var(--ink); text-decoration: none; font-size: 0.95rem; }
.footer-grid a:hover { color: var(--cyan); }
.footer-about p { color: var(--ink-faint); font-size: 0.95rem; max-width: 36ch; margin-top: 14px; }
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.footer-row a { text-decoration: none; color: var(--ink-faint); }
.footer-row a:hover { color: var(--cyan); }

/* ============ page header (non-home pages) ============ */
.page-header {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}
.page-header h1 { font-size: clamp(2.4rem, 4.6vw, 3.5rem); margin: 16px 0 20px; max-width: 24ch; }
.page-header .lede { max-width: 62ch; font-size: 1.1rem; color: var(--ink); }

/* motion */
.loop-path { stroke-dasharray: 6 8; animation: flow 3.2s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -140; } }
.pulse { animation: pulse 3s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.45; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ============ expertise pages ============ */
.check-list, .step-list { list-style: none; margin: 0; padding: 0; }
.check-list li, .step-list li { position: relative; padding: 12px 0 12px 30px; border-top: 1px solid var(--line); color: var(--ink); }
.check-list li:first-child, .step-list li:first-child { border-top: none; }
.check-list li::before { content: ""; position: absolute; left: 4px; top: 20px; width: 9px; height: 5px; border-left: 1.5px solid var(--cyan); border-bottom: 1.5px solid var(--cyan); transform: rotate(-45deg); }
.step-list { counter-reset: step; }
.step-list li { counter-increment: step; }
.step-list li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: 13px; font-family: var(--f-mono); font-size: 0.75rem; color: var(--amber); }
.step-list li b { display: block; color: var(--white); font-weight: 600; margin-bottom: 2px; }
.case-q { margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--line); color: var(--ink); }
.case-q span { display: block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan); margin-bottom: 4px; }

/* ============ positioning ============ */
.hero-for { margin-top: 20px; font-size: 0.92rem; color: var(--ink-faint); max-width: 52ch; }
.pain-table { border: 1px solid var(--line); }
.pain-row { display: grid; grid-template-columns: 160px minmax(0, 1.15fr) minmax(0, 1.2fr) minmax(0, 0.8fr); gap: 24px; padding: 20px 24px; border-top: 1px solid var(--line); background: var(--bg-panel); align-items: center; }
.pain-row:first-child { border-top: none; }
.pain-head { background: transparent; font-size: 0.74rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); padding-top: 14px; padding-bottom: 14px; }
.pain-row p { margin: 0; }
.pain-q { color: var(--white); font-family: var(--f-display); font-size: 1.35rem; line-height: 1.2; }
.pain-tool span { display: none; }
.pain-tool a, .offer-card b, .tool-card h3 a { color: var(--cyan); }
@media (max-width: 860px) {
  .pain-row { grid-template-columns: 1fr; gap: 10px; }
  .pain-head { display: none; }
  .pain-tool span { display: block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); }
}
.offer-card p { font-size: 0.95rem; }
.offer-card b { font-weight: 600; }
.offer-note { margin-top: 18px; color: var(--ink-dim); }
.offer-note a, .spec-row dd a, .depth-link a, .cell p a, .figno a { color: var(--cyan); }
/* jump targets sit out of the layout, so they never take a grid cell */
.anchor { position: absolute; top: -90px; left: 0; width: 1px; height: 1px; visibility: hidden; }
.service-block { position: relative; }
.tool-card img { width: 100%; height: auto; border: 1px solid var(--line-strong); margin-bottom: 18px; }
.tool-card h3 a { text-decoration: none; }
.tool-q { color: var(--white); font-style: italic; }
.cred-line { font-size: 0.88rem; line-height: 1.8; color: var(--ink-faint); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 18px 0; margin: 0; }
.cred-line i { font-style: italic; }
.depth-link { font-size: 0.95rem; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.badges a, .ci-badge { display: inline-block; }
/* status badges keep their own size: the tool-card screenshot rule must not stretch them */
.ci-badge, .tool-card img.ci-badge { height: 28px; width: auto; border: 0; margin: 0; }
@media (max-width: 420px) { .panel { padding: 22px; } .service-block { padding: 32px 0; } .spec-row { grid-template-columns: 1fr; gap: 4px; } }

/* ============ illustrations and screenshots ============ */
.illo {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--bg-deep);
  border: 1px solid var(--line);
}
.pain-row .illo { aspect-ratio: 16 / 10; }
@media (max-width: 860px) { .pain-row .illo { max-width: 360px; } }
.service-block .illo { margin-top: 24px; }
.case-figure { margin: 0 0 24px; }
.case-figure figcaption { font-size: 0.85rem; color: var(--ink-faint); margin-top: 8px; }
.tool-card .illo { margin-bottom: 18px; border-color: var(--line-strong); }

/* ============ figures ============ */
.fig-tag { margin-bottom: 16px; }
.fig-caption { font-size: 0.88rem; margin-top: 14px; color: var(--ink-faint); }
.offer-card .illo { margin-bottom: 18px; }
.tag-accent { border-color: var(--amber); color: var(--cyan); }
.breadcrumb { font-size: 0.88rem; color: var(--ink-faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--ink-faint); text-decoration: none; }
.breadcrumb a:hover { color: var(--cyan); }
/* field notes: figure beside the case details on wide screens */
.case-body:has(> .case-figure) { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); column-gap: 36px; align-items: start; }
.case-body > .case-figure { grid-row: 1 / span 3; margin: 0; }
.case-body:has(> .case-figure) > :not(.case-figure) { grid-column: 2; }
@media (max-width: 900px) {
  .case-body:has(> .case-figure) { display: block; }
  .case-body > .case-figure { margin-bottom: 24px; }
}