/* ============================================================
   AARTCON — Architecture & Interior Design
   Luxury design system: Deep Olive / White / Olive Green
   ============================================================ */

:root {
  --ink: #2f3a1f;          /* dark olive — text + dark section backgrounds */
  --ink-soft: #3b4826;     /* dark olive card surface */
  --ink-mute: #5c6349;     /* muted olive-gray secondary text */
  --paper: #ffffff;
  --paper-warm: #f5f6f0;   /* light olive-tinted background */
  /* olive accent scale (kept under --gold-* names so all references cascade) */
  --gold: #6b8e23;         /* primary bright olive accent */
  --gold-deep: #556b2f;    /* deeper olive — accent text / links on light */
  --gold-pale: #cdd6b5;    /* pale sage — subtle decorative */
  --olive-light: #9caf6d;  /* lighter olive — accents on dark backgrounds */
  --olive-hover: #4a5d29;  /* button hover */
  --concrete: #b8b4ad;
  --wood: #9c6b43;
  --glass: rgba(255, 255, 255, 0.65);
  --line: rgba(47, 58, 31, 0.12);
  --line-light: rgba(255, 255, 255, 0.14);

  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
  --space-7: 140px;
  --header-h: 84px;        /* solid header height — kept in sync by main.js */

  --radius: 2px;
  --shadow-soft: 0 20px 60px rgba(17, 17, 17, 0.08);
  --shadow-lift: 0 30px 80px rgba(17, 17, 17, 0.16);
  --ease-lux: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

::selection { background: var(--gold); color: var(--paper); }

/* ---------- Typography ---------- */

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.display-xl { font-size: clamp(44px, 7.5vw, 108px); }
.display-lg { font-size: clamp(36px, 5.2vw, 76px); }
.display-md { font-size: clamp(28px, 3.6vw, 52px); }
.display-sm { font-size: clamp(22px, 2.4vw, 32px); }

.eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-deep);
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.eyebrow::before {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--gold);
}

.lede {
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.75;
  color: var(--ink-mute);
  font-weight: 300;
  max-width: 60ch;
}

.serif-i { font-family: var(--font-display); font-style: italic; font-weight: 500; color: var(--gold-deep); }

/* ---------- Layout ---------- */

.container {
  width: min(1240px, calc(100% - 48px));
  margin-inline: auto;
}

.section { padding-block: var(--space-7); }
.section-tight { padding-block: var(--space-6); }

.section-head { max-width: 720px; margin-bottom: var(--space-5); }
.section-head h2 { margin-top: 18px; margin-bottom: 20px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 38px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: color 0.45s var(--ease-lux), border-color 0.45s var(--ease-lux);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.55s var(--ease-lux);
  z-index: 0;
}

.btn:hover::after { transform: scaleX(1); }
.btn:hover { border-color: var(--gold); }
.btn span, .btn svg { position: relative; z-index: 1; }

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

.btn-light {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}
.btn-light:hover { color: var(--paper); }

.btn-gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--paper);
}
.btn-gold::after { background: var(--olive-hover); }
.btn-gold:hover { border-color: var(--olive-hover); }

/* white-outline button — for use over the dark hero video */
.btn-line {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--paper);
}
.btn-line::after { background: var(--paper); }
.btn-line:hover { color: var(--ink); border-color: var(--paper); }
.btn svg { width: 15px; height: 15px; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 6px;
  transition: color 0.3s ease, gap 0.3s var(--ease-lux);
}
.text-link:hover { color: var(--gold-deep); gap: 16px; }

/* ---------- Header / Nav ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  color: var(--ink);
  /* clean white bar so the full-colour logo reads clearly on every page */
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  box-shadow: 0 1px 0 var(--line);
  transition: box-shadow 0.5s ease, transform 0.5s var(--ease-lux);
}

.site-header.hidden { transform: translateY(-100%); }

/* full logo lockup in the header */
.brand-logo {
  height: clamp(50px, 7vw, 72px);
  width: auto;
  display: block;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark { width: 40px; height: 40px; flex-shrink: 0; }

.brand-name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.brand-name em {
  font-style: normal;
  color: var(--gold-deep);
}

.brand-sub {
  display: block;
  font-family: var(--font-body);
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.nav-links a:not(.btn) {
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  position: relative;
  padding-block: 6px;
}

.nav-links a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease-lux);
}

.nav-links a:not(.btn):hover::after,
.nav-links a.active::after { transform: scaleX(1); transform-origin: left; }

.nav-links a.active { color: var(--gold-deep); }

.nav-links .btn { padding: 13px 26px; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 1.5px;
  background: var(--ink);
  margin: 6px auto;
  transition: transform 0.4s var(--ease-lux), opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* Header on dark hero */
.header-on-dark:not(.solid) { color: var(--paper); }
.header-on-dark:not(.solid) .nav-toggle span { background: var(--paper); }
.header-on-dark:not(.solid) .brand-sub { color: rgba(255,255,255,0.65); }
.header-on-dark:not(.solid) .btn-ghost { border-color: rgba(255,255,255,0.5); color: var(--paper); }

/* ---------- Page hero (inner pages) ---------- */

.page-hero {
  position: relative;
  padding-top: clamp(150px, 22vh, 220px);
  padding-bottom: var(--space-6);
  background: var(--paper-warm);
  overflow: hidden;
}

.page-hero .eyebrow { margin-bottom: 20px; }

.page-hero h1 { max-width: 14ch; }

.page-hero .lede { margin-top: 26px; }

.page-hero-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* ---------- Cards ---------- */

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: var(--space-4);
  transition: transform 0.5s var(--ease-lux), box-shadow 0.5s var(--ease-lux), border-color 0.4s;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
  border-color: transparent;
}

.card .num {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--gold-deep);
  letter-spacing: 0.1em;
}

.card h3 { font-size: 26px; margin: 18px 0 12px; }

.card p { color: var(--ink-mute); font-size: 15px; font-weight: 300; }

.card .icon {
  width: 52px;
  height: 52px;
  color: var(--gold-deep);
  margin-bottom: 22px;
}

/* ---------- Media frames ---------- */

.frame {
  position: relative;
  overflow: hidden;
  background: var(--concrete);
}

.frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s var(--ease-lux);
}

.frame:hover img { transform: scale(1.05); }

.frame-tall { aspect-ratio: 3 / 4; }
.frame-wide { aspect-ratio: 16 / 10; }
.frame-square { aspect-ratio: 1; }

.frame-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 28px;
  background: linear-gradient(to top, rgba(17,17,17,0.75), transparent);
  color: var(--paper);
}

.frame-caption .cat {
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 6px;
}

.frame-caption h3 { font-size: 24px; font-weight: 500; }

/* ---------- Dark sections ---------- */

.dark {
  background: var(--ink);
  color: var(--paper);
}

.dark .lede, .dark .card p { color: rgba(255, 255, 255, 0.6); }
.dark .card { background: var(--ink-soft); border-color: var(--line-light); }
.dark .eyebrow { color: var(--olive-light); }
.dark .eyebrow::before { background: var(--olive-light); }
.dark .text-link { color: var(--paper); }

/* ---------- Stats ---------- */

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  text-align: left;
}

.stat .stat-value {
  font-family: var(--font-display);
  font-size: clamp(44px, 4.5vw, 68px);
  font-weight: 500;
  color: var(--gold);
  line-height: 1;
}

.stat .stat-label {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- Process timeline ---------- */

.process-step {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-top: 1px solid var(--line);
}

.process-step:last-child { border-bottom: 1px solid var(--line); }

.process-step .step-no {
  font-family: var(--font-display);
  font-size: 44px;
  color: var(--gold);
  line-height: 1;
}

.process-step h3 { font-size: 28px; margin-bottom: 10px; }
.process-step p { color: var(--ink-mute); font-weight: 300; max-width: 62ch; }

/* ---------- Before / After ---------- */

.ba-slider {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  user-select: none;
  background: var(--concrete);
}

.ba-slider img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.ba-after-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  clip-path: inset(0 0 0 50%);
}

.ba-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--paper);
  transform: translateX(-50%);
  pointer-events: none;
  box-shadow: 0 0 20px rgba(0,0,0,0.35);
}

.ba-handle::after {
  content: "◂ ▸";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 1px;
}

.ba-range {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: ew-resize;
  margin: 0;
  -webkit-appearance: none;
}

.ba-label {
  position: absolute;
  top: 20px;
  padding: 8px 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  background: rgba(17, 17, 17, 0.6);
  color: var(--paper);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  pointer-events: none;
  z-index: 2;
}

.ba-label.before { left: 20px; }
.ba-label.after { right: 20px; background: rgba(107, 142, 35, 0.88); }

/* ---------- Testimonials ---------- */

.testimonial {
  max-width: 820px;
  margin-inline: auto;
  text-align: center;
}

.testimonial blockquote {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.8vw, 38px);
  font-weight: 500;
  font-style: italic;
  line-height: 1.4;
}

.testimonial .who {
  margin-top: 30px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--olive-light);
}

.testimonial .where {
  margin-top: 6px;
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.t-dots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 44px;
}

.t-dots button {
  width: 34px;
  height: 2px;
  border: none;
  background: rgba(255,255,255,0.25);
  cursor: pointer;
  transition: background 0.3s;
  padding: 0;
  position: relative;
}

.t-dots button::before { content: ""; position: absolute; inset: -12px 0; }

.t-dots button.active { background: var(--gold); }

/* ---------- Forms ---------- */

.field { margin-bottom: 26px; }

.field label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  margin-bottom: 10px;
  color: var(--ink-mute);
}

.field label .req { color: var(--gold-deep); }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 16px 18px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(107, 142, 35, 0.2);
}

.field textarea { min-height: 140px; resize: vertical; }

.field .hint { font-size: 12.5px; color: var(--ink-mute); margin-top: 8px; font-weight: 300; }

/* ---------- Footer ---------- */

.site-footer {
  background: #ffffff;
  color: var(--ink-mute);
  padding-top: var(--space-6);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
}

.site-footer h4 {
  font-family: var(--font-body);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 22px;
}

.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 12px; font-size: 14.5px; font-weight: 300; color: var(--ink-mute); }
.site-footer a { transition: color 0.3s; color: var(--ink); }
.site-footer a:hover { color: var(--gold-deep); }

/* footer brand: full logo + slogan */
.footer-logo { width: 250px; max-width: 100%; height: auto; display: block; margin: -10px 0 0 -8px; }
.footer-slogan {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 18px;
  color: var(--gold-deep);
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-block: 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  flex-wrap: wrap;
  color: var(--ink-mute);
}

/* ---------- Reveal animations ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(36px);
}

.no-js [data-reveal],
.reduced-motion [data-reveal] {
  opacity: 1;
  transform: none;
}

/* ---------- Marquee ---------- */

.marquee {
  overflow: hidden;
  border-block: 1px solid var(--line);
  padding-block: 22px;
  white-space: nowrap;
}

.marquee-track {
  display: inline-flex;
  gap: 60px;
  animation: marquee 28s linear infinite;
}

.marquee span {
  font-family: var(--font-display);
  font-size: 22px;
  font-style: italic;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 60px;
}

.marquee span::after { content: "◆"; font-size: 8px; color: var(--gold); font-style: normal; }

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ---------- CTA band ---------- */

.cta-band {
  position: relative;
  text-align: center;
  overflow: hidden;
}

.cta-band h2 { max-width: 18ch; margin-inline: auto; }
.cta-band .btn { margin-top: 40px; }

/* ---------- Cost estimator ---------- */

.est-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  grid-template-areas: "inputs result" "tiers result";
  gap: var(--space-5);
  align-items: stretch;
}
.est-inputs { grid-area: inputs; align-self: start; }
.est-tiers  { grid-area: tiers; align-self: start; }
.est-result { grid-area: result; }

.est-field-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 14px;
  display: block;
}

.est-area-row {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 10px;
}

.est-area-row input[type="number"] {
  width: 130px;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  color: var(--paper);
  background: var(--ink-soft);
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
}

.est-area-row input[type="number"]:focus { outline: none; border-color: var(--gold); }

.est-area-row .unit {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}

.est-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.18);
  outline: none;
  margin: 22px 0 34px;
}

.est-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gold);
  cursor: pointer;
  border: 4px solid var(--ink);
  box-shadow: 0 0 0 1px var(--gold);
}

.est-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  cursor: pointer;
  border: 4px solid var(--ink);
  box-shadow: 0 0 0 1px var(--gold);
}

.tier-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.tier-card {
  background: var(--ink-soft);
  border: 1px solid var(--line-light);
  padding: 20px 18px;
  cursor: pointer;
  text-align: left;
  color: var(--paper);
  font-family: var(--font-body);
  transition: border-color 0.3s, transform 0.3s var(--ease-lux);
}

.tier-card:hover { transform: translateY(-3px); }

.tier-card.active { border-color: var(--gold); box-shadow: 0 0 0 1px var(--gold); }

.tier-card .tier-name {
  font-family: var(--font-display);
  font-size: 21px;
  margin-bottom: 6px;
}

.tier-card.active .tier-name { color: var(--olive-light); }

.tier-card .tier-rate { font-size: 12.5px; color: rgba(255,255,255,0.55); }

.tier-card .tier-desc { font-size: 12px; color: rgba(255,255,255,0.45); margin-top: 8px; line-height: 1.5; }

.est-result {
  background: var(--ink-soft);
  border: 1px solid var(--line-light);
  border-top: 2px solid var(--gold);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.est-result .est-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

.est-result .est-value {
  font-family: var(--font-display);
  font-size: clamp(34px, 3.6vw, 52px);
  color: var(--gold);
  margin: 18px 0 6px;
  line-height: 1.1;
}

.est-result .est-sub { font-size: 13px; color: rgba(255,255,255,0.5); }

.est-result .est-note {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  margin-top: 20px;
  line-height: 1.6;
}

.est-result .btn { margin-top: 26px; align-self: center; }

/* ---------- FAQ ---------- */

.faq { max-width: 820px; margin-inline: auto; }

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 26px 4px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  transition: color 0.3s;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary:hover { color: var(--gold-deep); }

.faq summary::after {
  content: "+";
  font-family: var(--font-body);
  font-size: 22px;
  font-weight: 300;
  color: var(--gold-deep);
  flex-shrink: 0;
  transition: transform 0.35s var(--ease-lux);
}

.faq details[open] summary::after { transform: rotate(45deg); }

.faq details p {
  padding: 0 4px 26px;
  color: var(--ink-mute);
  font-weight: 300;
  max-width: 68ch;
}

@media (max-width: 900px) {
  /* stack so the estimate sits right under the built-up area (before the finish cards),
     keeping it visible like the desktop side-by-side layout */
  .est-grid { grid-template-columns: 1fr; grid-template-areas: "inputs" "result" "tiers"; gap: var(--space-4); }
  .est-tiers { margin-top: 0; }
  .tier-row { grid-template-columns: 1fr; }
  .faq summary { font-size: 19px; }
}

/* ---------- WhatsApp float ---------- */

.wa-float {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 800;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #1f9e52;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  transition: transform 0.35s var(--ease-lux);
}

.wa-float:hover { transform: translateY(-4px) scale(1.06); }
.wa-float svg { width: 28px; height: 28px; fill: #fff; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); row-gap: var(--space-4); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .section { padding-block: var(--space-6); }
  .grid-2 { grid-template-columns: 1fr; gap: var(--space-4); }
  .grid-3 { grid-template-columns: 1fr; }

  .nav-toggle { display: block; }

  .nav-links {
    /* Viewport units (not inset:0) so the full-screen menu still fills the
       screen even though the header ancestor carries a GSAP transform, which
       would otherwise trap this fixed element inside the header's box. */
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: var(--ink);
    color: var(--paper);
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    transform: translateY(-100%);
    transition: transform 0.6s var(--ease-lux);
    z-index: 1000;
  }

  .nav-links.open { transform: translateY(0); }

  .nav-links a:not(.btn) { font-size: 17px; letter-spacing: 0.3em; }

  .process-step { grid-template-columns: 1fr; gap: 14px; }
}

@media (max-width: 560px) {
  .grid-4 { grid-template-columns: 1fr; }
  .container { width: calc(100% - 40px); }
  .btn { padding: 16px 28px; letter-spacing: 0.18em; }
  .brand-name { font-size: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .wa-float { right: 18px; bottom: 18px; width: 52px; height: 52px; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}