/* ============================================================
   STRATWICK — styles.css
   Self-contained. System fonts only. No external requests.
   Palette: warm bone paper + near-black ink + British racing green accent.
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* Warm paper neutrals */
  --paper:      #f4f0e8;
  --paper-2:    #ece6da;   /* inset panels */
  --paper-3:    #fbf9f4;   /* raised cards */

  /* Ink */
  --ink:        #191b1c;
  --ink-soft:   #4c4f50;
  --ink-faint:  #7b7c76;

  /* Accent — British racing green */
  --accent:     #24544a;
  --accent-deep:#1c443b;
  --accent-tint:rgba(36, 84, 74, 0.10);

  /* Structure */
  --rule:       rgba(25, 27, 28, 0.14);
  --rule-soft:  rgba(25, 27, 28, 0.08);

  /* Type */
  --serif: "Iowan Old Style", "Palatino Linotype", "Palatino", "Book Antiqua", Georgia, "Times New Roman", serif;
  --sans:  system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", "JetBrains Mono", "Menlo", "Consolas", monospace;

  /* Rhythm */
  --measure: 64ch;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --section-y: clamp(4.5rem, 11vw, 9rem);
  --maxw: 1180px;

  --shadow: 0 1px 2px rgba(25,27,28,.05), 0 18px 40px -28px rgba(25,27,28,.28);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #131516;
    --paper-2:    #191c1d;
    --paper-3:    #1b1e1f;

    --ink:        #e9e4d7;
    --ink-soft:   #a7a89f;
    --ink-faint:  #7d7e76;

    --accent:     #74a897;
    --accent-deep:#8bbcac;
    --accent-tint:rgba(116, 168, 151, 0.14);

    --rule:       rgba(233, 228, 215, 0.16);
    --rule-soft:  rgba(233, 228, 215, 0.08);

    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 22px 48px -30px rgba(0,0,0,.7);
  }
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.012em; }
p { margin: 0; }
a { color: inherit; }

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

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: .7rem 1.1rem;
  z-index: 100;
  font: 600 .85rem/1 var(--mono);
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------- Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); }
.section-inset { background: var(--paper-2); }

/* ---------- Shared type devices ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.25rem;
  display: flex;
  align-items: center;
  gap: .8rem;
}
.eyebrow::before {
  content: "";
  width: 1.9rem;
  height: 1px;
  background: currentColor;
  opacity: .6;
  flex: none;
}

.section-head { max-width: 40rem; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-heading {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.85rem, 1.3rem + 2.6vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
}
.section-lede {
  margin-top: 1.4rem;
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 0.98rem + 0.3vw, 1.2rem);
  line-height: 1.55;
}

/* ---------- Buttons ---------- */
.btn {
  --pad-y: .82rem;
  --pad-x: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: var(--pad-y) var(--pad-x);
  font: 500 .9rem/1 var(--sans);
  letter-spacing: .01em;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}
.btn-primary { background: var(--accent); color: #f6f4ee; }
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-1px); }
@media (prefers-color-scheme: dark) { .btn-primary { color: #0f1211; } }

.btn-ghost {
  border-color: var(--rule);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-text {
  padding-inline: 0;
  color: var(--ink-soft);
  background: transparent;
}
.btn-text:hover { color: var(--accent); }

/* ---------- Brand mark ---------- */
.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  color: var(--ink);
}
.brand-word {
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 13px;
  height: 13px;
  flex: none;
  border: 1.5px solid var(--accent);
  transform: rotate(45deg);
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--accent);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 68px;
}
.site-nav {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}
.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: .88rem;
  letter-spacing: .01em;
  position: relative;
  padding-block: .25rem;
  transition: color .16s ease;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}
.site-nav a:hover::after { transform: scaleX(1); }
.header-cta { margin-left: .25rem; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(4rem, 10vw, 8rem) clamp(4rem, 9vw, 7rem); }
.hero-inner { max-width: 62rem; }

.hero-heading {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 1.4rem + 5vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin-bottom: 1.6rem;
}
.hero-sub {
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 1rem + 0.55vw, 1.35rem);
  line-height: 1.5;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

/* Signature: confidence-tagged finding */
.finding {
  margin: clamp(3rem, 6vw, 4.5rem) 0 0;
  max-width: 40rem;
  padding: 1.6rem 1.8rem;
  background: var(--paper-3);
  border: 1px solid var(--rule);
  border-left: 2px solid var(--accent);
  border-radius: 3px;
  box-shadow: var(--shadow);
}
.finding-label {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: .9rem;
}
.finding-body {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.4rem);
  line-height: 1.4;
  color: var(--ink);
}

/* Calibration device (reused signature) */
.calibration {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-top: 1.3rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.cal-label { color: var(--ink-faint); }
.cal-ticks { display: inline-flex; gap: 4px; }
.tick {
  width: 15px;
  height: 6px;
  border-radius: 1px;
  background: var(--rule);
}
.tick.on { background: var(--accent); }
.cal-value { color: var(--accent); font-weight: 600; margin-left: .1rem; }

/* ---------- What we deliver ---------- */
.offerings {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
.offering {
  background: var(--paper);
  padding: clamp(1.8rem, 3.5vw, 2.8rem);
  display: flex;
  flex-direction: column;
  gap: .9rem;
  transition: background .2s ease;
}
.offering:hover { background: var(--paper-3); }
.offering-tag {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}
.offering-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.7rem);
  line-height: 1.15;
}
.offering-body { color: var(--ink-soft); max-width: 40ch; }

/* ---------- Method / pillars ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
}
.pillar { border-top: 2px solid var(--accent); padding-top: 1.4rem; }
.pillar-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.3rem;
  margin-bottom: .85rem;
}
.pillar-body { color: var(--ink-soft); font-size: .98rem; }

/* ---------- Format & turnaround ---------- */
.format-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}
.format-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}
.format-list li {
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule);
}
.fl-key {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink);
  padding-top: .15rem;
}
.fl-val { color: var(--ink-soft); font-size: .96rem; }

.turnaround {
  background: var(--paper-3);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: clamp(1.6rem, 3vw, 2.2rem);
  box-shadow: var(--shadow);
  position: sticky;
  top: 92px;
}
.turnaround-label {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.2rem;
}
.turn-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .9rem 0;
  border-top: 1px solid var(--rule-soft);
}
.turn-row:first-of-type { border-top: 0; }
.turn-name { color: var(--ink); font-size: .98rem; }
.turn-time {
  font-family: var(--mono);
  font-size: .92rem;
  color: var(--accent);
  white-space: nowrap;
}
.turnaround-note {
  margin-top: 1.3rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: .88rem;
  line-height: 1.5;
}

/* ---------- Engagement / pricing ---------- */
.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 2.5vw, 1.75rem);
}
.plan {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: clamp(1.8rem, 3vw, 2.4rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.plan-featured {
  background: var(--paper-3);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--rule));
  box-shadow: var(--shadow);
  position: relative;
}
.plan-featured::before {
  content: "Most requested";
  position: absolute;
  top: -1px; right: 1.4rem;
  transform: translateY(-50%);
  background: var(--accent);
  color: #f6f4ee;
  font: 600 .62rem/1 var(--mono);
  letter-spacing: .16em;
  text-transform: uppercase;
  padding: .38rem .6rem;
  border-radius: 2px;
}
@media (prefers-color-scheme: dark) { .plan-featured::before { color: #0f1211; } }

.plan-name {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}
.price {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ink-faint);
  display: flex;
  align-items: baseline;
}
.price-figure {
  font-size: clamp(1.9rem, 1.4rem + 1.6vw, 2.5rem);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.plan-desc { color: var(--ink-soft); font-size: .96rem; }
.plans-foot {
  margin-top: 1.75rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--ink-faint);
}

/* ---------- Contact ---------- */
.contact-inner { max-width: 44rem; }
.contact-heading { font-size: clamp(2rem, 1.4rem + 3vw, 3.4rem); }
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2.25rem;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--rule);
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: .9rem;
}
.footer-line { color: var(--ink-soft); font-size: .95rem; max-width: 44ch; }
.footer-meta {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--ink-faint);
  display: flex;
  gap: .8rem;
  align-items: center;
  flex-wrap: wrap;
}
.footer-meta a { text-decoration: none; color: var(--ink-soft); }
.footer-meta a:hover { color: var(--accent); }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .site-nav { display: none; }
  .format-grid { grid-template-columns: 1fr; }
  .turnaround { position: static; }
  .pillars { grid-template-columns: 1fr; gap: 2rem; }
  .plans { grid-template-columns: 1fr; }
  .format-list li { grid-template-columns: 1fr; gap: .35rem; }
  .fl-key { padding-top: 0; }
}

@media (max-width: 560px) {
  .offerings { grid-template-columns: 1fr; }
  .header-cta { display: none; }
  .hero-actions { gap: 1rem; }
  .btn { --pad-x: 1.25rem; }
  .finding { padding: 1.3rem 1.4rem; }
  .calibration { flex-wrap: wrap; gap: .6rem; }
}

/* Fallback when backdrop-filter unsupported */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header { background: var(--paper); }
}