/* =========================================================
   COMMERCIAL FLOORING SERVICES — Prototype
   Aesthetic: Editorial Trade Craft
   Type: Fraunces (display) · Inter Tight (body) · JetBrains Mono (numerics)
   ========================================================= */

:root {
  /* Palette — warm + grounded */
  --bg: #F4F0EA;
  --bg-alt: #EDE7DC;
  --paper: #FBF8F2;
  --ink: #1A1715;
  --ink-mid: #4A4239;
  --ink-soft: #6B5F50;
  --stone: #A39A8C;
  --hairline: rgba(26, 23, 21, 0.12);
  --hairline-strong: rgba(26, 23, 21, 0.28);

  --accent: #C4582B;      /* burnt sienna — refined */
  --accent-deep: #A04420;
  --accent-soft: #E8B493;

  --sage: #7A8B6F;
  --sage-soft: #B9C4AE;

  --night: #1B2A3A;
  --night-deep: #0F1A26;

  /* Type scale */
  --f-display: "Fraunces", ui-serif, Georgia, serif;
  --f-body: "Inter Tight", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Sizing — fluid */
  --step-0: clamp(0.875rem, 0.83rem + 0.22vw, 1rem);
  --step-1: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
  --step-2: clamp(1.125rem, 1.05rem + 0.4vw, 1.35rem);
  --step-3: clamp(1.4rem, 1.25rem + 0.7vw, 1.85rem);
  --step-4: clamp(1.85rem, 1.6rem + 1.4vw, 2.7rem);
  --step-5: clamp(2.4rem, 1.9rem + 2.6vw, 4rem);
  --step-6: clamp(3.2rem, 2.3rem + 4.5vw, 6.5rem);
  --step-7: clamp(4rem, 2.4rem + 7.5vw, 9rem);

  /* Spacing */
  --pad-page: clamp(1.25rem, 4vw, 3.5rem);
  --container: 1280px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 180ms;
  --t-med: 320ms;
  --t-slow: 600ms;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
}

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

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--f-body);
  font-size: var(--step-1);
  font-weight: 400;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* =================== ACCESSIBILITY =================== */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--bg); padding: 0.75rem 1rem;
  z-index: 9999; border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

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

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

/* =================== TYPOGRAPHY =================== */
h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  font-variation-settings: "opsz" 80, "SOFT" 60;
}
h1 em, h2 em, h3 em { font-style: italic; color: var(--accent); font-variation-settings: "opsz" 80, "SOFT" 100; }
h3 { font-size: var(--step-3); line-height: 1.15; }
p { margin: 0 0 1em; }

.display { font-size: var(--step-5); max-width: 22ch; }
.display--light { color: var(--paper); }
.display em { color: var(--accent-soft); font-style: italic; }
.display--light em { color: var(--accent-soft); }

.kicker {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1.5rem;
}
.kicker::before {
  content: ""; position: absolute; left: 0; top: 50%;
  width: 1rem; height: 1px; background: var(--accent); transform: translateY(-50%);
}
.kicker--accent { color: var(--accent); }
.kicker--accent::before { background: var(--accent); }
.kicker--light { color: rgba(255,255,255,0.7); }
.kicker--light::before { background: var(--accent-soft); }

.lede { font-size: var(--step-2); line-height: 1.45; color: var(--ink-mid); max-width: 56ch; }
.lede--light { color: rgba(255,255,255,0.85); }

/* =================== BUTTONS =================== */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-weight: 500;
  font-size: var(--step-0);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t-med) var(--ease-out), background var(--t-fast), color var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
  position: relative;
  will-change: transform;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
  background: var(--ink); color: var(--paper);
  box-shadow: 0 1px 0 rgba(255,255,255,0.12) inset, 0 8px 24px -10px rgba(26,23,21,0.45);
}
.btn--primary:hover { background: var(--accent); }
.btn--ghost {
  background: transparent; color: var(--ink); border-color: var(--hairline-strong);
}
.btn--ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--lg { padding: 1.05rem 1.7rem; font-size: var(--step-1); }
.btn__arrow { transition: transform var(--t-med) var(--ease-out); }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* =================== NAV =================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem var(--pad-page);
  transition: background var(--t-med), backdrop-filter var(--t-med), box-shadow var(--t-med);
}
.nav--scrolled {
  background: rgba(244, 240, 234, 0.88);
  backdrop-filter: blur(16px) saturate(1.2);
  box-shadow: 0 1px 0 var(--hairline);
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
}
.logo { display: inline-flex; align-items: center; gap: 0.75rem; color: var(--ink); }
.logo__mark { color: var(--ink); }
.logo__text { display: flex; flex-direction: column; font-family: var(--f-display); font-size: 0.95rem; line-height: 1.1; }
.logo__line2 { color: var(--ink-soft); font-size: 0.78rem; letter-spacing: 0.02em; }
.nav__links { display: flex; gap: 1.75rem; font-size: var(--step-0); }
.nav__links a {
  position: relative; padding: 0.4rem 0; color: var(--ink-mid);
  transition: color var(--t-fast);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 1px; background: var(--accent);
  transition: width var(--t-med) var(--ease-out);
}
.nav__links a:hover::after { width: 100%; }
.nav__menu { display: none; background: none; border: 0; width: 32px; height: 32px; flex-direction: column; justify-content: center; gap: 5px; padding: 0; }
.nav__menu span { width: 22px; height: 1.5px; background: var(--ink); transition: var(--t-fast); }
@media (max-width: 900px) {
  .nav__links, .nav__cta { display: none; }
  .nav__menu { display: flex; }
}

/* =================== HERO =================== */
.hero {
  position: relative;
  min-height: 100svh;
  padding: 6rem var(--pad-page) 4rem;
  display: grid;
  align-content: end;
  overflow: hidden;
  isolation: isolate;
}
.hero__canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: -2;
}
.hero__overlay {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(80% 60% at 20% 100%, rgba(196,88,43,0.18) 0%, transparent 70%),
    linear-gradient(180deg, rgba(244,240,234,0.4) 0%, rgba(244,240,234,0.85) 70%, var(--bg) 100%);
}
.hero__grain {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.09 0 0 0 0 0.08 0 0 0 0.65 0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}
.hero__content {
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 0.75rem;
  font-family: var(--f-mono); font-size: 0.78rem;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  margin-bottom: 2rem;
}
.hero__eyebrow .dot {
  width: 8px; height: 8px; background: var(--accent); border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(196,88,43,0.18);
  animation: pulse 2.4s var(--ease-in-out) infinite;
}
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(196,88,43,0.4); } 50% { box-shadow: 0 0 0 8px rgba(196,88,43,0); } }

.hero__title {
  font-family: var(--f-display);
  font-size: var(--step-7);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 0.92;
  margin: 0 0 1.5rem;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  max-width: 14ch;
}
.hero__line { display: block; opacity: 0; transform: translateY(40px); animation: rise 1.2s var(--ease-out) forwards; }
.hero__line:nth-child(1) { animation-delay: 0.1s; }
.hero__line:nth-child(2) { animation-delay: 0.25s; }
.hero__line:nth-child(3) { animation-delay: 0.4s; }
.hero__line--italic { font-style: italic; color: var(--accent); font-variation-settings: "opsz" 144, "SOFT" 100; }
@keyframes rise { to { opacity: 1; transform: translateY(0); } }

.hero__lede {
  font-size: var(--step-2);
  color: var(--ink-mid);
  max-width: 58ch;
  margin: 0 0 2rem;
  opacity: 0; animation: rise 1.2s var(--ease-out) 0.6s forwards;
}
.hero__ctas { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 4rem; opacity: 0; animation: rise 1.2s var(--ease-out) 0.75s forwards; }

.hero__stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem 3rem; margin: 0;
  padding-top: 2rem; border-top: 1px solid var(--hairline);
  opacity: 0; animation: rise 1.2s var(--ease-out) 0.9s forwards;
}
.hero__stats div { display: flex; flex-direction: column-reverse; }
.hero__stats dt { font-family: var(--f-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--ink-soft); margin-top: 0.4rem; }
.hero__stats dd { font-family: var(--f-display); font-size: var(--step-5); margin: 0; font-weight: 500; letter-spacing: -0.03em; font-variation-settings: "opsz" 96; }

.hero__scroll {
  position: absolute; bottom: 1.5rem; right: var(--pad-page);
  display: flex; align-items: center; gap: 0.5rem;
  background: none; border: 0; color: var(--ink-soft);
  font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.16em; text-transform: uppercase;
  z-index: 2;
}
.hero__scroll svg { animation: bob 2.4s var(--ease-in-out) infinite; }
@keyframes bob { 50% { transform: translateY(4px); } }

/* =================== TRUST BAR =================== */
.trust {
  padding: 4rem var(--pad-page);
  background: var(--paper);
  border-block: 1px solid var(--hairline);
}
.trust__heading { font-family: var(--f-body); font-size: var(--step-1); font-weight: 400; color: var(--ink-mid); text-align: center; max-width: 60ch; margin: 0 auto 2.5rem; line-height: 1.5; letter-spacing: 0; }
.trust__kicker { display: block; font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.2em; color: var(--ink-soft); margin-bottom: 0.5rem; }
.trust__logos { list-style: none; padding: 0; margin: 0; display: flex; justify-content: space-around; flex-wrap: wrap; gap: 2.5rem; align-items: center; max-width: var(--container); margin-inline: auto; }
.trust__logos img { height: 38px; width: auto; object-fit: contain; opacity: 0.65; filter: grayscale(1) contrast(1.05); transition: opacity var(--t-med), filter var(--t-med); }
.trust__logos img:hover { opacity: 1; filter: grayscale(0); }

/* =================== WHY / CARDS =================== */
.why {
  padding: clamp(4rem, 8vw, 7rem) var(--pad-page);
  max-width: var(--container);
  margin: 0 auto;
}
.why__intro { max-width: 70ch; margin-bottom: 4rem; }
.why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
@media (max-width: 900px) {
  .why__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .why__grid { grid-template-columns: 1fr; }
}
.card {
  background: var(--paper);
  padding: 2rem 1.75rem 1.75rem;
  position: relative;
  transition: background var(--t-med);
}
.card:hover { background: var(--bg); }
.card__num {
  font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.18em; color: var(--accent); margin-bottom: 1rem; font-weight: 500;
}
.card h3 { font-size: var(--step-2); margin: 0 0 0.6rem; }
.card p { color: var(--ink-mid); margin: 0; }

/* =================== MATERIALS GRID =================== */
.materials {
  padding: clamp(4rem, 8vw, 7rem) var(--pad-page);
  max-width: var(--container);
  margin: 0 auto;
}
.materials__head { margin-bottom: 3rem; max-width: 60ch; }
.materials__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.material {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper);
  aspect-ratio: 4/5;
  cursor: pointer;
  transition: transform var(--t-med) var(--ease-out);
}
.material:hover { transform: translateY(-4px); }
.material__img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transition: transform 1.4s var(--ease-out);
}
.material:hover .material__img { transform: scale(1.06); }
.material::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(26,23,21,0.85) 100%);
}
.material__body { position: absolute; inset: auto 0 0 0; padding: 1.1rem 1.15rem; color: var(--paper); z-index: 1; }
.material__body h3 { font-size: var(--step-2); margin: 0 0 0.2rem; color: var(--paper); font-variation-settings: "opsz" 80, "SOFT" 100; line-height: 1.15; }
.material__body p { color: rgba(255,255,255,0.85); margin: 0 0 0.65rem; font-size: 0.82rem; line-height: 1.4; }
.material__meta { display: flex; justify-content: space-between; align-items: center; font-family: var(--f-mono); font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.7); }
.material__meta strong { color: var(--accent-soft); font-family: var(--f-display); font-style: italic; font-size: 0.95rem; letter-spacing: 0; text-transform: none; font-weight: 600; }

@media (max-width: 1024px) {
  .materials__grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
  .materials__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px) {
  .materials__grid { grid-template-columns: 1fr; }
  .material { aspect-ratio: 16/10; }
}

/* =================== QUOTE CALCULATOR =================== */
.quote {
  padding: clamp(4rem, 8vw, 7rem) var(--pad-page);
  background: var(--bg-alt);
  border-block: 1px solid var(--hairline);
}
.quote .quote__intro,
.quote .calc {
  max-width: var(--container); margin: 0 auto;
}
.quote__intro { margin-bottom: 3rem; max-width: 65ch; }
.quote__sidenote {
  margin-top: 1.5rem; padding: 1rem 1.25rem;
  background: var(--paper); border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--step-0); color: var(--ink-mid);
  display: flex; flex-direction: column; gap: 0.25rem;
}
.quote__sidenote strong { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); }

.calc {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.5rem);
}
.calc__field { border: 0; padding: 0; margin: 0 0 1.5rem; grid-column: 1; }
.calc__field legend { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--ink-soft); margin-bottom: 0.85rem; padding: 0; }
.calc__chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-block;
  padding: 0.55rem 1rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  font-size: var(--step-0);
  background: transparent;
  transition: all var(--t-fast);
  user-select: none;
}
.chip:hover span { border-color: var(--ink); }
.chip input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 3px; }

.calc__num { display: flex; flex-direction: column; gap: 0.6rem; }
.calc__num label { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--ink-soft); }
.calc__num-row { display: flex; align-items: baseline; gap: 0.5rem; border-bottom: 2px solid var(--ink); padding-bottom: 0.25rem; }
.calc__num input[type="number"] {
  font-family: var(--f-display); font-size: var(--step-5); font-weight: 500;
  border: 0; background: transparent; padding: 0; width: 100%;
  font-variation-settings: "opsz" 96; letter-spacing: -0.03em; color: var(--ink);
}
.calc__num input[type="number"]:focus { outline: 0; }
.calc__unit { font-family: var(--f-display); font-size: var(--step-3); font-style: italic; color: var(--ink-soft); }
.calc__num input[type="range"] {
  width: 100%; accent-color: var(--accent); height: 2px;
}
.calc__num small { color: var(--ink-soft); font-size: 0.82rem; }

.calc__addons { display: grid; gap: 0.5rem; }
.addon { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.75rem 1rem; border: 1px solid var(--hairline); border-radius: var(--radius-sm); cursor: pointer; transition: all var(--t-fast); }
.addon:hover { border-color: var(--ink); background: var(--bg-alt); }
.addon input { margin-top: 4px; accent-color: var(--accent); }
.addon input:checked ~ span { color: var(--ink); }
.addon span { display: flex; flex-direction: column; gap: 0.15rem; font-size: var(--step-0); color: var(--ink-mid); }
.addon strong { color: var(--ink); font-weight: 500; }
.addon em { font-style: normal; font-size: 0.82rem; color: var(--ink-soft); }
.addon:has(input:checked) { background: rgba(196,88,43,0.06); border-color: var(--accent); }

.calc__out {
  grid-column: 2; grid-row: 1 / span 5;
  background: var(--ink); color: var(--paper);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex; flex-direction: column; gap: 1.25rem;
  position: sticky; top: 100px; align-self: flex-start;
}
.calc__range-label { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: rgba(255,255,255,0.55); }
.calc__range-value { display: flex; align-items: baseline; gap: 0.5rem; font-family: var(--f-display); font-size: var(--step-5); line-height: 1; letter-spacing: -0.03em; font-variation-settings: "opsz" 96; margin: 0.3rem 0 0.5rem; }
.calc__range-dash { color: var(--accent-soft); font-style: italic; }
.calc__range-unit { font-size: 0.82rem; color: rgba(255,255,255,0.6); }
.calc__range-unit span { color: var(--accent-soft); font-family: var(--f-mono); }

.calc__break { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 1.25rem; }
.calc__break h4 { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: rgba(255,255,255,0.55); margin: 0 0 0.75rem; font-weight: 500; }
#breakdown { list-style: none; padding: 0; margin: 0; font-size: var(--step-0); }
#breakdown li { display: flex; justify-content: space-between; padding: 0.45rem 0; border-bottom: 1px dashed rgba(255,255,255,0.1); }
#breakdown li:last-child { border-bottom: 0; font-weight: 500; }
#breakdown li span:last-child { font-family: var(--f-mono); color: var(--accent-soft); }

.calc__compliance { background: rgba(255,255,255,0.06); padding: 1rem; border-radius: var(--radius-sm); border-left: 2px solid var(--accent); font-size: 0.85rem; }
.calc__compliance strong { font-family: var(--f-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--accent-soft); display: block; margin-bottom: 0.3rem; }
.calc__compliance p { margin: 0; color: rgba(255,255,255,0.85); }

.calc__cta { display: flex; flex-direction: column; gap: 0.5rem; margin-top: auto; }
.calc__cta .btn { justify-content: center; }
.calc__cta .btn--primary { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.calc__cta .btn--primary:hover { background: var(--accent-deep); }
.calc__cta .btn--ghost { color: var(--paper); border-color: rgba(255,255,255,0.25); }
.calc__cta .btn--ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

@media (max-width: 900px) {
  .calc { grid-template-columns: 1fr; }
  .calc__out { grid-column: 1; grid-row: auto; position: static; }
}

/* =================== PROJECTS =================== */
.projects {
  padding: clamp(4rem, 8vw, 7rem) var(--pad-page);
  max-width: var(--container);
  margin: 0 auto;
}
.projects__head { margin-bottom: 3rem; }
.projects__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.project { display: flex; flex-direction: column; gap: 1.25rem; }
.project__img { aspect-ratio: 4/3; background-size: cover; background-position: center; border-radius: var(--radius-md); transition: transform var(--t-med); }
.project:hover .project__img { transform: scale(1.01); }
.project__meta span { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--accent); }
.project__meta h3 { font-size: var(--step-2); margin: 0.5rem 0; line-height: 1.2; }
.project__meta p { color: var(--ink-mid); font-size: var(--step-0); margin: 0; }

/* =================== AI / DARK SECTION =================== */
.ai {
  position: relative;
  padding: clamp(5rem, 9vw, 8rem) var(--pad-page);
  background: var(--night);
  color: var(--paper);
  overflow: hidden;
  isolation: isolate;
}
.ai__bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 80% at 80% 20%, rgba(196,88,43,0.32), transparent 60%),
    radial-gradient(50% 70% at 0% 100%, rgba(122,139,111,0.22), transparent 65%);
}
.ai__bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.ai__inner { max-width: var(--container); margin: 0 auto; }
.ai__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: rgba(255,255,255,0.12);
  margin-top: 3rem;
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
}
.ai__grid > div { background: var(--night); padding: 2rem 1.5rem; transition: background var(--t-med); }
.ai__grid > div:hover { background: var(--night-deep); }
.ai__grid h3 { font-size: var(--step-2); color: var(--paper); margin: 0 0 0.6rem; font-variation-settings: "opsz" 80; }
.ai__grid p { color: rgba(255,255,255,0.7); margin: 0; font-size: var(--step-0); line-height: 1.5; }

/* =================== ABOUT =================== */
.about {
  padding: clamp(4rem, 8vw, 7rem) var(--pad-page);
  max-width: var(--container);
  margin: 0 auto;
  display: grid; grid-template-columns: 220px 1fr;
  gap: 3rem; align-items: center;
}
.about__photo { position: relative; width: 220px; }
.about__photo img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  filter: contrast(1.02);
  border: 4px solid var(--paper);
  box-shadow: 0 12px 36px -12px rgba(26,23,21,0.35);
}
.about__photo figcaption { font-family: var(--f-mono); font-size: 0.72rem; color: var(--ink-soft); margin-top: 0.85rem; text-align: center; letter-spacing: 0.08em; }
.about__chips { list-style: none; padding: 0; margin: 1.5rem 0 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.about__chips li {
  font-family: var(--f-mono); font-size: 0.78rem; color: var(--ink-mid);
  padding: 0.4rem 0.85rem;
  background: var(--paper); border: 1px solid var(--hairline);
  border-radius: 999px;
}
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; gap: 2rem; justify-items: center; text-align: left; }
  .about__photo { margin: 0 auto; }
}

/* =================== CONTACT =================== */
.contact {
  padding: clamp(4rem, 8vw, 7rem) var(--pad-page);
  background: var(--ink); color: var(--paper);
}
.contact__inner { max-width: var(--container); margin: 0 auto; }
.contact .display { color: var(--paper); max-width: 26ch; margin-bottom: 3rem; }
.contact__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.contact__card {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 2rem 1.75rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  transition: background var(--t-med), border-color var(--t-med), transform var(--t-med);
}
.contact__card:hover { background: rgba(255,255,255,0.08); border-color: var(--accent); transform: translateY(-3px); }
.contact__label { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--accent-soft); }
.contact__big { font-family: var(--f-display); font-size: var(--step-3); font-variation-settings: "opsz" 80; line-height: 1; margin: 0.25rem 0; color: var(--paper); }
.contact__sub { font-size: 0.85rem; color: rgba(255,255,255,0.6); }

/* =================== FOOTER =================== */
.footer {
  padding: 4rem var(--pad-page) 1.5rem;
  background: var(--bg-alt);
  border-top: 1px solid var(--hairline);
}
.footer__inner {
  max-width: var(--container); margin: 0 auto;
  display: grid; grid-template-columns: 1fr 2fr; gap: 3rem;
  padding-bottom: 3rem; border-bottom: 1px solid var(--hairline);
}
.footer__brand { font-family: var(--f-display); font-size: var(--step-3); font-weight: 500; letter-spacing: -0.02em; }
.footer__brand + p { color: var(--ink-mid); margin: 0.5rem 0 0; max-width: 35ch; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.footer__cols h4 { font-family: var(--f-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.18em; color: var(--ink-soft); margin: 0 0 1rem; font-weight: 500; }
.footer__cols a, .footer__cols p { display: block; color: var(--ink-mid); font-size: var(--step-0); margin: 0 0 0.4rem; line-height: 1.5; }
.footer__cols a:hover { color: var(--accent); }
.footer__base { max-width: var(--container); margin: 1.5rem auto 0; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-family: var(--f-mono); font-size: 0.72rem; color: var(--ink-soft); }
@media (max-width: 700px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: repeat(2, 1fr); }
}

/* =================== CHAT WIDGET =================== */
.chat-toggle {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 90;
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: var(--ink); color: var(--paper);
  border: 0; border-radius: 999px; padding: 0.85rem 1.25rem;
  box-shadow: 0 10px 32px -10px rgba(26,23,21,0.6);
  font-size: var(--step-0); font-weight: 500;
  transition: transform var(--t-med), background var(--t-fast);
}
.chat-toggle:hover { background: var(--accent); transform: translateY(-3px); }
.chat-toggle svg { color: var(--accent-soft); }

.chat {
  position: fixed; bottom: 5rem; right: 1.5rem; z-index: 91;
  width: min(380px, calc(100vw - 3rem));
  max-height: 70vh;
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px -20px rgba(26,23,21,0.4);
  display: flex; flex-direction: column;
  overflow: hidden;
  transform-origin: bottom right;
  animation: chatIn var(--t-med) var(--ease-out);
}
@keyframes chatIn { from { opacity: 0; transform: translateY(20px) scale(0.96); } }
.chat[hidden] { display: none; }
.chat__header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--hairline); display: flex; justify-content: space-between; align-items: center; background: var(--bg); }
.chat__title { display: block; font-family: var(--f-display); font-weight: 500; font-size: 1.05rem; }
.chat__sub { display: block; font-size: 0.75rem; color: var(--ink-soft); }
.chat__close { background: none; border: 0; font-size: 1.1rem; color: var(--ink-soft); padding: 0.25rem 0.5rem; }
.chat__close:hover { color: var(--accent); }
.chat__log { flex: 1; padding: 1rem; overflow-y: auto; display: flex; flex-direction: column; gap: 0.75rem; }
.msg { display: flex; }
.msg--bot p { background: var(--bg); padding: 0.7rem 1rem; border-radius: 14px 14px 14px 4px; max-width: 85%; font-size: var(--step-0); margin: 0; line-height: 1.45; }
.msg--user { justify-content: flex-end; }
.msg--user p { background: var(--ink); color: var(--paper); padding: 0.7rem 1rem; border-radius: 14px 14px 4px 14px; max-width: 85%; font-size: var(--step-0); margin: 0; }
.chat__suggestions { display: flex; flex-wrap: wrap; gap: 0.4rem; padding-top: 0.5rem; }
.chat__suggestions button { background: var(--paper); border: 1px solid var(--hairline); border-radius: 999px; padding: 0.45rem 0.85rem; font-size: 0.78rem; color: var(--ink-mid); transition: all var(--t-fast); }
.chat__suggestions button:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chat__form { display: flex; gap: 0.5rem; padding: 0.85rem; border-top: 1px solid var(--hairline); background: var(--bg); }
.chat__form input { flex: 1; border: 1px solid var(--hairline); background: var(--paper); border-radius: 999px; padding: 0.6rem 1rem; font: inherit; }
.chat__form input:focus { outline: 0; border-color: var(--accent); }
.chat__form button { background: var(--accent); color: var(--paper); border: 0; border-radius: 999px; width: 38px; height: 38px; font-size: 1.1rem; }
.chat__form button:hover { background: var(--accent-deep); }

/* =================== REVEAL ANIMATIONS =================== */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out); }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* Counter style */
[data-counter] { font-variant-numeric: tabular-nums; }

/* =========================================================
   MOBILE POLISH — ≤ 720px
   Centred layout, working drawer menu, tighter rhythm
   ========================================================= */

/* Working mobile menu drawer */
@media (max-width: 900px) {
  .nav__links {
    display: flex !important;
    position: fixed;
    inset: 0;
    background: var(--paper);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.75rem;
    padding: 4rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform 0.45s var(--ease-out);
    z-index: 200;
    font-size: 1.4rem;
    font-family: var(--f-display);
    letter-spacing: -0.01em;
  }
  /* When menu is open, force nav header opaque (kills the backdrop-blur showing through) */
  body.menu-open .nav,
  body.menu-open .nav--scrolled {
    background: var(--paper);
    backdrop-filter: none;
    box-shadow: none;
  }
  .nav__links a { padding: 0.5rem 1rem; color: var(--ink); }
  .nav__links a::after { display: none; }
  .nav__links.is-open { transform: translateX(0); }

  .nav__cta { display: none; }

  /* Hamburger → X */
  .nav__menu { display: flex; z-index: 101; position: relative; }
  .nav__menu span { transition: transform 0.32s var(--ease-out), opacity 0.2s; }
  .nav__menu[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__menu[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav__menu[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  body.menu-open { overflow: hidden; }
}

/* Centred mobile presentation */
@media (max-width: 720px) {
  :root { --pad-page: 1.1rem; }

  /* Hero */
  .hero { padding-top: 5rem; padding-bottom: 3rem; min-height: 92svh; text-align: center; }
  .hero__content { display: flex; flex-direction: column; align-items: center; }
  .hero__eyebrow { margin-inline: auto; }
  .hero__title { max-width: 100%; font-size: clamp(2.6rem, 11vw, 4rem); }
  .hero__title .hero__line { display: block; }
  .hero__lede { margin-inline: auto; }
  .hero__ctas { justify-content: center; }
  .hero__ctas .btn { flex: 1 1 auto; justify-content: center; }
  .hero__stats { grid-template-columns: repeat(3, 1fr); gap: 0.75rem; text-align: center; width: 100%; }
  .hero__stats div { align-items: center; }
  .hero__stats dt { font-size: 0.66rem; letter-spacing: 0.12em; }
  .hero__stats dd { font-size: clamp(1.4rem, 6vw, 2rem); }
  .hero__scroll { left: 50%; right: auto; transform: translateX(-50%); bottom: 1.25rem; }

  /* Section intros — centred */
  .why__intro,
  .materials__head,
  .quote__intro,
  .projects__head,
  .ai__inner,
  .contact__inner { text-align: center; }

  .why__intro .lede,
  .quote__intro .lede,
  .ai__inner .lede,
  .lede,
  .display { margin-left: auto; margin-right: auto; }

  .kicker { padding-left: 0; }
  .kicker::before { display: none; }

  .quote__sidenote { text-align: left; }

  /* Cards centred */
  .why__grid { border-radius: var(--radius-md); }
  .card { text-align: center; padding: 1.75rem 1.25rem; }
  .card__num { display: inline-block; }
  .card h3 { font-size: var(--step-2); }

  /* Materials — keep image cards left-aligned text (better for overlay) */
  .materials__grid { gap: 0.75rem; }
  .material__body { text-align: left; padding: 1rem; }

  /* Quote calc */
  .calc { padding: 1.25rem; gap: 1.5rem; }
  .calc__field legend { text-align: center; }
  .calc__chips { justify-content: center; }
  .calc__num { align-items: center; }
  .calc__num small { text-align: center; }
  .calc__num input[type="number"] { text-align: center; font-size: 3rem; }
  .calc__num-row { justify-content: center; }
  .calc__addons .addon { text-align: left; }
  .calc__out { padding: 1.5rem 1.25rem; text-align: center; }
  .calc__range-value { justify-content: center; }
  #breakdown li { font-size: 0.82rem; }
  .calc__compliance { text-align: left; }

  /* Projects */
  .project { text-align: center; }
  .project__meta { padding: 0 0.5rem; }

  /* AI grid */
  .ai__grid > div { text-align: center; padding: 1.75rem 1.25rem; }

  /* About — small portrait, stacked + centred */
  .about { gap: 1.5rem; text-align: center; }
  .about__photo { width: 160px; }
  .about__photo img { width: 160px; height: 160px; }
  .about__chips { justify-content: center; }
  .about__body { display: flex; flex-direction: column; align-items: center; }

  /* Contact */
  .contact__grid { gap: 0.75rem; }
  .contact__card { text-align: center; align-items: center; padding: 1.5rem 1.25rem; }

  /* Footer — full centre */
  .footer__inner { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
  .footer__brand + p { margin-inline: auto; }
  .footer__cols { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer__cols a, .footer__cols p { text-align: center; }
  .footer__base { flex-direction: column; align-items: center; text-align: center; gap: 0.5rem; }

  /* Trust logos — tighter */
  .trust { padding: 3rem 1rem; }
  .trust__logos { gap: 1.5rem 2rem; }
  .trust__logos img { height: 28px; }

  /* Chat widget — full-screen on mobile, sized to the visible viewport so the
     virtual keyboard never covers the input field */
  .chat-toggle { right: 1rem; bottom: 1rem; }
  .chat {
    top: 0; right: 0; bottom: auto; left: 0;
    width: auto;
    height: var(--vv-height, 100dvh);
    max-height: var(--vv-height, 100dvh);
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
  }
  /* Pad the header below the iOS notch / status bar so the close X is reachable */
  .chat__header {
    padding-top: calc(env(safe-area-inset-top, 0px) + 1rem);
    padding-left: calc(env(safe-area-inset-left, 0px) + 1.25rem);
    padding-right: calc(env(safe-area-inset-right, 0px) + 0.75rem);
  }
  /* Make the close target much bigger + obvious on mobile */
  .chat__close {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--ink);
    background: var(--bg);
    border-radius: 999px;
    border: 1px solid var(--hairline);
  }
  .chat__close:active { background: var(--ink); color: var(--paper); }
  /* And pad the form bottom away from the home-indicator safe area */
  .chat__form {
    padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 0.85rem);
  }
  body.chat-open .chat-toggle { display: none; }
  /* Hide the site nav while the chat is open — chat owns the screen + has its own close X */
  body.chat-open .nav { display: none; }

  /* Buttons stretch a bit nicer on mobile */
  .btn--lg { padding: 0.95rem 1.4rem; }
}

/* Extra-narrow polish */
@media (max-width: 420px) {
  .hero__stats { grid-template-columns: 1fr; gap: 1rem; }
  .hero__title { font-size: clamp(2.4rem, 12vw, 3.4rem); }
  .calc__num input[type="number"] { font-size: 2.4rem; }
  .calc__range-value { font-size: 2.4rem; }
}