/* ==========================================================================
   AI·NEXTSTEP - business site
   Editorial-elegant light system (per DESIGN.md reference)
   Canvas #e5e5e5 · Cards #ffffff · Inverted #000000 · Mint #d1ffca · Volt #fff100
   Display: Playfair Display (serif, Cyrillic+Latin, 400/500 + italic) · Body: Inter · Mono: Roboto Mono
   Elegant serif headlines in sentence case, em accent in italic green, flat surfaces.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --canvas:   #e5e5e5;
  --card:     #ffffff;
  --ink:      #000000;
  --slate:    #444444;
  --smoke:    #979797;
  --ash:      #c6c6c6;
  --mist:     #f3f3f3;
  --graphite: #2f2f2f;
  --mint:     #d1ffca;
  --mint-2:   #bff2b6;
  --volt:     #fff100;
  --leaf:     #178a4c;
  --leaf-deep: #0f6b39;

  /* Type families */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Radii */
  --r-tag: 999px;
  --r-card: 28px;
  --r-card-lg: 48px;
  --r-btn: 8px;
  --r-pill: 48px;

  /* Spacing */
  --sect: clamp(56px, 8vw, 112px);
  --gutter: clamp(20px, 4vw, 48px);

  /* Layout */
  --maxw: 1200px;
}

/* --------------------------------------------------------------------------
   Reset & base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--card);
  padding: 12px 20px;
  border-radius: 0 0 var(--r-btn) 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: 0;
  margin: 0;
  text-wrap: balance;
}

.h-display {
  font-size: clamp(40px, 6.2vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.h-section {
  font-size: clamp(32px, 4.8vw, 64px);
  line-height: 1.1;
}
.h-medium {
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.15;
}

.display em {
  font-style: italic;
  font-weight: 500;
  color: var(--leaf);
}
.hero-title em {
  color: var(--leaf);
}
.cta-band .display em, .section-ink .display em { color: var(--mint); }

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: -0.01em;
  line-height: 1.5;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.01em;
  color: var(--slate);
  margin: 0 0 18px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--ink);
  flex: none;
}

.lead {
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.35;
  color: var(--slate);
  max-width: 62ch;
  margin: 0;
}

.body-muted { color: var(--smoke); }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 16px;
  line-height: 1;
  padding: 17px 26px;
  border-radius: var(--r-btn);
  border: 1.5px solid transparent;
  white-space: nowrap;
  transition: transform .18s cubic-bezier(.16,1,.3,1), background-color .18s ease, color .18s ease, border-color .18s ease;
  cursor: pointer;
}
.btn:active { transform: translateY(1px) scale(.99); }

.btn-primary {
  background: var(--ink);
  color: var(--card);
}
.btn-primary:hover { background: var(--graphite); }

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

.btn-mint {
  background: var(--mint);
  color: var(--ink);
}
.btn-mint:hover { background: var(--mint-2); }

.btn-light {
  background: var(--card);
  color: var(--ink);
}
.btn-light:hover { background: var(--mint); }

.btn .arr { font-size: 1.1em; line-height: 0; }

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 14px 0;
  background: var(--canvas);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card);
  border-radius: var(--r-pill);
  padding: 8px 10px 8px 22px;
  min-height: 58px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: 0.02em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
}
.logo .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mint);
  outline: 1.5px solid var(--ink);
  outline-offset: 1px;
  flex: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--slate);
  padding: 9px 14px;
  border-radius: 999px;
  white-space: nowrap;
  transition: background-color .15s ease, color .15s ease;
}
.nav-links a:hover { background: var(--mist); color: var(--ink); }
.nav-links a[aria-current="page"] { background: var(--ink); color: var(--card); }

.nav-actions { display: flex; align-items: center; gap: 10px; }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--ash);
  border-radius: 999px;
  padding: 3px;
  background: var(--mist);
  flex: none;
}
.lang-toggle button {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  border: 0;
  background: transparent;
  color: var(--smoke);
  padding: 6px 11px;
  border-radius: 999px;
  line-height: 1;
  transition: background-color .15s ease, color .15s ease;
}
.lang-toggle button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--card);
}

.nav .btn { padding: 13px 20px; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--ash);
  background: var(--card);
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  flex: none;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  position: relative;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform .2s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  padding: clamp(32px, 5vw, 72px) 0 0;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.28fr 1fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  min-height: calc(100dvh - 170px);
  max-height: 760px;
}
.hero-title { margin: 0 0 26px; }
.hero-sub {
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.45;
  color: var(--slate);
  max-width: 52ch;
  margin: 0 0 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-art {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 520px;
  width: 100%;
  margin-inline: auto;
}

/* Abstract geometric server/AI composition */
.art-block {
  position: absolute;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.art-block svg { width: 46%; height: 46%; }
.art-a { background: var(--ink); color: var(--card); width: 62%; height: 62%; top: 4%; left: 4%; border-radius: 34px; }
.art-b { background: var(--card); color: var(--ink); width: 46%; height: 46%; bottom: 2%; right: 2%; border-radius: 26px; }
.art-c { background: var(--mint); color: var(--ink); width: 30%; height: 30%; top: 46%; left: 12%; border-radius: 20px; }
.art-d { background: var(--volt); color: var(--ink); width: 20%; height: 20%; bottom: 30%; right: 24%; border-radius: 16px; }
.art-tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  background: var(--card);
  border-radius: 999px;
  padding: 7px 12px;
  z-index: 3;
  white-space: nowrap;
}
.art-tag.t1 { top: -8px; right: 6%; }
.art-tag.t2 { bottom: 4%; left: 4%; background: var(--ink); color: var(--card); }

.marquee {
  border-top: 1.5px solid var(--ink);
  border-bottom: 1.5px solid var(--ink);
  overflow: hidden;
  margin-top: clamp(28px, 4vw, 56px);
  background: var(--canvas);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee-set {
  display: flex;
  align-items: center;
  gap: 30px;
  padding: 15px 15px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--slate);
  white-space: nowrap;
}
.marquee-set i {
  font-style: normal;
  color: var(--smoke);
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; width: 100%; overflow: hidden; }
  .marquee-set { width: 50%; }
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section { padding: var(--sect) 0; }
.section-alt { background: var(--card); border-radius: var(--r-card-lg) var(--r-card-lg) 0 0; }
.section-ink { background: var(--ink); color: var(--card); border-radius: var(--r-card-lg); }

.section-head { margin-bottom: clamp(32px, 4vw, 56px); }
.section-head .lead { margin-top: 22px; }

.section-ink .eyebrow { color: var(--ash); }
.section-ink .eyebrow::before { background: var(--mint); }
.section-ink .lead { color: var(--ash); }

/* --------------------------------------------------------------------------
   Cards / grids
   -------------------------------------------------------------------------- */
.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.card {
  background: var(--card);
  border-radius: var(--r-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mist);
  color: var(--ink);
  margin-bottom: 6px;
}
.card .icon svg { width: 26px; height: 26px; }
.card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 25px;
  line-height: 1.15;
  margin: 0;
}
.card p { margin: 0; color: var(--slate); font-size: 15.5px; line-height: 1.5; }
.card .card-foot { margin-top: auto; }

.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--mint);
  color: var(--ink);
  border-radius: var(--r-tag);
  padding: 6px 13px;
  line-height: 1;
}
.tag.t-alt { background: var(--mist); }
.tag.t-dark { background: var(--ink); color: var(--card); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }

.card-link {
  font-weight: 500;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--ash);
}
.card-link:hover { text-decoration-color: var(--ink); }

/* Inverted card variant */
.card-ink { background: var(--ink); color: var(--card); }
.card-ink p { color: var(--ash); }
.card-ink .icon { background: var(--graphite); color: var(--card); }

/* Feature (service) card with number */
.feature {
  background: var(--card);
  border-radius: var(--r-card);
  padding: clamp(24px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.feature-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.feature .icon {
  width: 60px; height: 60px; border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--ink); color: var(--card);
}
.feature .icon svg { width: 30px; height: 30px; }
.feature h3 {
  font-family: var(--font-display); font-weight: 500; font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.12; margin: 0;
}
.feature p { margin: 0; color: var(--slate); line-height: 1.55; }
.feature ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.feature li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--slate);
  line-height: 1.45;
}
.feature li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--mint);
  outline: 1px solid var(--ink);
  outline-offset: 1px;
}

/* Stats */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stat {
  background: var(--card);
  border-radius: var(--r-card);
  padding: 26px 24px;
}
.stat-num {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  display: block;
}
.stat-label { color: var(--slate); font-size: 14.5px; margin-top: 10px; display: block; }
.stat-ink { background: var(--ink); color: var(--card); }
.stat-ink .stat-label { color: var(--ash); }
.stat-ink .stat-num { color: var(--mint); }

/* Split row (why me) */
.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(28px, 4vw, 72px); align-items: start; }
.split-sticky { position: sticky; top: 100px; }

.check-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.check-list li {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border-radius: var(--r-card); padding: 20px 22px;
}
.check-list .num {
  font-family: var(--font-display); font-weight: 500; font-size: 22px; line-height: 1;
  color: var(--ink); flex: none;
}
.check-list .txt b { display: block; font-size: 16.5px; margin-bottom: 4px; }
.check-list .txt span { color: var(--slate); font-size: 15px; line-height: 1.45; display: block; }

/* Process steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.step {
  background: var(--card); border-radius: var(--r-card); padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
}
.step-num {
  font-family: var(--font-display); font-weight: 500; font-size: 44px; line-height: 1;
  color: var(--ash);
}
.step h3 { font-family: var(--font-display); font-weight: 500; font-size: 21px; margin: 0; }
.step p { margin: 0; color: var(--slate); font-size: 14.5px; line-height: 1.5; }

/* --------------------------------------------------------------------------
   CTA band
   -------------------------------------------------------------------------- */
.cta-band {
  background: var(--ink);
  color: var(--card);
  border-radius: var(--r-card-lg);
  padding: clamp(40px, 6vw, 80px);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}
.cta-band .h-section { color: var(--card); }
.cta-band .lead { color: var(--ash); margin-top: 20px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: flex-end; }

/* --------------------------------------------------------------------------
   Pricing
   -------------------------------------------------------------------------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.price-card {
  background: var(--card); border-radius: var(--r-card); padding: 30px;
  display: flex; flex-direction: column; gap: 18px;
}
.price-card.featured { background: var(--ink); color: var(--card); }
.price-card .p-name {
  font-family: var(--font-display); font-weight: 500; font-size: 27px; margin: 0;
}
.price-card .p-price {
  font-family: var(--font-display); font-weight: 500; font-size: clamp(34px, 3.4vw, 48px); line-height: 1; margin: 0;
}
.price-card .p-price small { font-family: var(--font-body); font-weight: 400; font-size: 15px; color: var(--smoke); text-transform: none; }
.price-card.featured .p-price small { color: var(--ash); }
.price-card .p-desc { color: var(--slate); font-size: 15px; margin: 0; line-height: 1.5; }
.price-card.featured .p-desc { color: var(--ash); }
.price-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; flex: 1; }
.price-card li { position: relative; padding-left: 24px; font-size: 14.5px; color: var(--slate); line-height: 1.45; }
.price-card.featured li { color: var(--ash); }
.price-card li::before {
  content: ""; position: absolute; left: 0; top: 0.45em; width: 9px; height: 9px;
  border-radius: 50%; background: var(--mint); outline: 1px solid var(--ink); outline-offset: 1px;
}
.price-card .btn { align-self: flex-start; }

/* FAQ */
.faq { display: grid; gap: 12px; }
.faq details {
  background: var(--card); border-radius: var(--r-card); overflow: hidden;
}
.faq summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px 26px;
  font-weight: 500; font-size: 16.5px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mono); font-size: 22px; line-height: 1; color: var(--slate); transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .faq-body { padding: 0 26px 24px; color: var(--slate); font-size: 15px; line-height: 1.55; max-width: 72ch; }

/* --------------------------------------------------------------------------
   Cases
   -------------------------------------------------------------------------- */
.case-row {
  display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(20px, 3vw, 48px);
  background: var(--card); border-radius: var(--r-card-lg); padding: clamp(24px, 3.4vw, 48px);
  align-items: center;
}
.case-row + .case-row { margin-top: 20px; }
.case-row:nth-child(even) .case-art { order: 2; }
.case-art {
  background: var(--mist); border-radius: var(--r-card); aspect-ratio: 4 / 3;
  display: flex; align-items: center; justify-content: center; color: var(--ink);
  position: relative; overflow: hidden;
}
.case-art svg { width: 44%; height: 44%; color: var(--ink); opacity: .9; }
.case-art .case-badge {
  position: absolute; top: 16px; left: 16px; font-family: var(--font-mono); font-size: 11px;
  background: var(--ink); color: var(--card); border-radius: 999px; padding: 6px 12px;
}
.case-body h3 {
  font-family: var(--font-display); font-weight: 500; font-size: clamp(26px, 2.8vw, 36px);
  line-height: 1.1; margin: 0 0 14px;
}
.case-body p { color: var(--slate); line-height: 1.55; margin: 0 0 18px; }
.case-body .tags { margin-bottom: 20px; }

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(28px, 4vw, 72px); align-items: center; }
.portrait {
  background: var(--ink); color: var(--card); border-radius: var(--r-card-lg);
  aspect-ratio: 4 / 5; display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.portrait .mono-mark {
  font-family: var(--font-display); font-weight: 500; font-size: clamp(80px, 12vw, 160px);
  line-height: 1; letter-spacing: 0; color: var(--card);
}
.portrait .portrait-tag {
  position: absolute; bottom: 22px; left: 22px; font-family: var(--font-mono); font-size: 12px;
  background: var(--mint); color: var(--ink); border-radius: 999px; padding: 8px 14px;
}
.stack-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.stack-list li {
  font-family: var(--font-mono); font-size: 13px; background: var(--card);
  border-radius: 999px; padding: 9px 16px;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: clamp(28px, 4vw, 64px); align-items: start; }
.contact-channels { display: grid; gap: 16px; }
.channel {
  background: var(--card); border-radius: var(--r-card); padding: 24px 26px;
  display: flex; align-items: center; gap: 18px;
}
.channel .icon {
  width: 52px; height: 52px; border-radius: 16px; flex: none;
  background: var(--ink); color: var(--card); display: flex; align-items: center; justify-content: center;
}
.channel .icon svg { width: 26px; height: 26px; }
.channel b { display: block; font-size: 16px; margin-bottom: 3px; }
.channel span { color: var(--slate); font-size: 14.5px; word-break: break-all; }
.channel:hover b { text-decoration: underline; }

.form-card { background: var(--card); border-radius: var(--r-card-lg); padding: clamp(24px, 3vw, 40px); }
.field { margin-bottom: 20px; }
.field label {
  display: block; font-weight: 500; font-size: 15px; margin-bottom: 8px;
}
.field label .opt { color: var(--smoke); font-weight: 400; }
.input {
  width: 100%; font: inherit; font-size: 16px; color: var(--ink);
  background: var(--mist); border: 1.5px solid transparent;
  border-radius: var(--r-btn); padding: 15px 16px;
  transition: border-color .15s ease, background-color .15s ease;
}
.input::placeholder { color: var(--smoke); }
.input:focus { outline: none; border-color: var(--ink); background: var(--card); }
textarea.input { resize: vertical; min-height: 140px; }
.field-error { display: none; color: #b3261e; font-size: 13.5px; margin: 8px 0 0; }
.field.has-error .input { border-color: #b3261e; }
.field.has-error .field-error { display: block; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.form-status { font-size: 15px; min-height: 24px; margin: 16px 0 0; }
.form-status.ok { color: #1c7c3c; }
.form-status.err { color: #b3261e; }
.form-note { color: var(--smoke); font-size: 13.5px; margin: 20px 0 0; line-height: 1.5; }

.spinner {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,.35); border-top-color: #fff;
  animation: spin .7s linear infinite; display: none;
}
.btn.loading .spinner { display: inline-block; }
.btn.loading { pointer-events: none; opacity: .8; }
@keyframes spin { to { transform: rotate(360deg); } }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--ink); color: var(--card);
  margin-top: var(--sect); padding: clamp(40px, 5vw, 64px) 0 28px;
  border-radius: var(--r-card-lg) var(--r-card-lg) 0 0;
}
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer .logo { color: var(--card); }
.footer .logo .dot { background: var(--mint); }
.footer-desc { color: var(--ash); font-size: 14.5px; max-width: 34ch; margin: 16px 0 0; }
.footer-col h4 {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.02em;
  color: var(--smoke); margin: 0 0 16px; font-weight: 400;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-col a { color: var(--card); font-size: 15px; }
.footer-col a:hover { color: var(--mint); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between;
  border-top: 1px solid var(--graphite); margin-top: 40px; padding-top: 22px;
  font-family: var(--font-mono); font-size: 12px; color: var(--smoke);
}
.footer-bottom a { color: var(--smoke); }
.footer-bottom a:hover { color: var(--mint); }

/* --------------------------------------------------------------------------
   Reveal animation
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1);
}
[data-reveal].is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; min-height: auto; max-height: none; }
  .hero-art { max-width: 420px; margin-top: 8px; }
  .split { grid-template-columns: 1fr; }
  .split-sticky { position: static; }
  .cta-band { grid-template-columns: 1fr; }
  .cta-actions { justify-content: flex-start; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .case-row { grid-template-columns: 1fr; }
  .case-row:nth-child(even) .case-art { order: 0; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-inner { padding: 8px 10px 8px 18px; }
  .nav.is-open .nav-links {
    display: flex;
    position: absolute;
    top: calc(100% + 8px);
    left: var(--gutter);
    right: var(--gutter);
    flex-direction: column;
    align-items: stretch;
    background: var(--card);
    border-radius: var(--r-card);
    padding: 10px;
    box-shadow: 0 30px 60px -20px rgba(0,0,0,.25);
  }
  .nav.is-open .nav-links a { padding: 14px 16px; border-radius: 14px; }
  .grid-2, .grid-3, .grid-5, .steps, .price-grid, .stats { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .h-display { font-size: clamp(32px, 10vw, 52px); }
}

/* Reduced motion / accessibility */
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.section-ink :focus-visible, .footer :focus-visible { outline-color: var(--mint); }