/* =======================================================
   Tech AI — Stylesheet
   ======================================================= */

:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #6366f1;
  --color-accent: #22d3ee;
  --color-violet: #a855f7;

  --color-bg: #ffffff;
  --color-bg-alt: #f6f7fb;
  --color-bg-dark: #0b1120;
  --color-bg-dark-alt: #10182b;

  --color-text: #1e2433;
  --color-text-muted: #5b6478;
  --color-text-inverse: #e9ecf7;
  --color-text-inverse-muted: #a4acc4;

  --color-border: #e6e8f0;
  --color-border-dark: #232b42;

  --gradient-brand: linear-gradient(120deg, var(--color-primary) 0%, var(--color-violet) 55%, var(--color-accent) 100%);
  --gradient-hero: radial-gradient(60% 60% at 80% 20%, rgba(99, 102, 241, 0.35), transparent 60%),
                    radial-gradient(50% 50% at 10% 90%, rgba(34, 211, 238, 0.20), transparent 60%),
                    linear-gradient(180deg, #0b1120 0%, #0d1526 100%);

  --shadow-sm: 0 1px 3px rgba(17, 24, 39, 0.08);
  --shadow-md: 0 8px 24px rgba(17, 24, 39, 0.08);
  --shadow-lg: 0 20px 45px rgba(17, 24, 39, 0.12);
  --shadow-glow: 0 20px 60px rgba(79, 70, 229, 0.25);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --container-w: 1180px;
  --header-h: 76px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

section { position: relative; }

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.08);
  border: 1px solid rgba(79, 70, 229, 0.18);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-brand);
}
.eyebrow.on-dark {
  color: #c7d2fe;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}

.section-head {
  max-width: 640px;
  margin: 0 0 48px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(28px, 3.4vw, 38px); margin: 14px 0 14px; }
.section-head p { color: var(--color-text-muted); font-size: 17px; }

.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color .25s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 24px 50px rgba(79, 70, 229, 0.35); }

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }

.btn-ghost-dark {
  background: rgba(255,255,255,0.04);
  color: #fff;
  border-color: rgba(255,255,255,0.18);
}
.btn-ghost-dark:hover { border-color: rgba(255,255,255,0.5); transform: translateY(-2px); }

.btn-block { width: 100%; }
.btn-sm { padding: 10px 18px; font-size: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: rgba(11, 17, 32, 0.55);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.is-light {
  background: rgba(255, 255, 255, 0.75);
  border-bottom-color: var(--color-border);
}
.site-header.is-scrolled { box-shadow: var(--shadow-md); }

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--color-text-inverse);
}
.site-header.is-light .brand { color: var(--color-text); }
.brand .brand-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.brand .brand-mark svg { width: 20px; height: 20px; }
.brand small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text-inverse-muted);
}
.site-header.is-light .brand small { color: var(--color-text-muted); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-inverse-muted);
  transition: color 0.2s, background 0.2s;
}
.site-header.is-light .nav-links a { color: var(--color-text-muted); }
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.site-header.is-light .nav-links a:hover { color: var(--color-text); background: rgba(17,24,39,0.06); }
.nav-links a.active { color: #fff; background: rgba(255,255,255,0.1); }
.site-header.is-light .nav-links a.active { color: var(--color-primary); background: rgba(79,70,229,0.08); }

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

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.05);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.site-header.is-light .nav-toggle { border-color: var(--color-border); background: transparent; }
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.site-header.is-light .nav-toggle span { background: var(--color-text); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--header-h) + 96px) 0 100px;
  background: var(--gradient-hero);
  color: var(--color-text-inverse);
  overflow: hidden;
  position: relative;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.6), transparent 70%);
  pointer-events: none;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  margin: 18px 0 20px;
  color: #fff;
}
.hero p.lead {
  font-size: 18px;
  color: var(--color-text-inverse-muted);
  max-width: 540px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }
.hero-media { position: relative; }
.hero-media img { filter: drop-shadow(0 30px 60px rgba(0,0,0,0.45)); }
.hero-media .float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: rgba(15, 21, 40, 0.75);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 600;
  animation: floaty 6s ease-in-out infinite;
}
.hero-media .float-card svg { width: 20px; height: 20px; color: var(--color-accent); }
.hero-media .float-card.card-1 { top: 6%; left: -6%; animation-delay: 0s; }
.hero-media .float-card.card-2 { bottom: 10%; right: -8%; animation-delay: 1.4s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 30px;
}
.trust-row .trust-item { display: flex; gap: 12px; align-items: flex-start; }
.trust-row svg { width: 22px; height: 22px; color: var(--color-accent); flex-shrink: 0; margin-top: 2px; }
.trust-row strong { display: block; font-size: 15px; color: #fff; margin-bottom: 2px; }
.trust-row span { font-size: 13.5px; color: var(--color-text-inverse-muted); }

/* ---------- Page header (inner pages) ---------- */
.page-header {
  padding: calc(var(--header-h) + 76px) 0 80px;
  background: var(--gradient-hero);
  color: var(--color-text-inverse);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-header::after {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(60% 60% at 50% 30%, rgba(0,0,0,0.6), transparent 75%);
}
.page-header .container { position: relative; z-index: 1; }
.page-header h1 { font-size: clamp(30px, 4vw, 46px); color: #fff; margin: 16px 0 14px; }
.page-header p { color: var(--color-text-inverse-muted); font-size: 17px; max-width: 560px; margin: 0 auto; }
.breadcrumb { margin-top: 26px; display: flex; gap: 8px; justify-content: center; font-size: 14px; color: var(--color-text-inverse-muted); }
.breadcrumb a:hover { color: #fff; }

/* ---------- Sections ---------- */
.section { padding: 100px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

/* ---------- Stats mini ---------- */
.value-props {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.value-card {
  padding: 26px 22px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.value-card .icon-badge { margin-bottom: 16px; }
.value-card h3 { font-size: 17px; margin-bottom: 8px; }
.value-card p { font-size: 14.5px; color: var(--color-text-muted); }

.icon-badge {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: var(--gradient-brand);
  color: #fff;
}
.icon-badge svg { width: 24px; height: 24px; }
.icon-badge.outline {
  background: rgba(79,70,229,0.08);
  color: var(--color-primary);
}

/* ---------- Service cards ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  position: relative;
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: rgba(79,70,229,0.25); }
.service-card h3 { font-size: 19px; margin: 18px 0 10px; }
.service-card p { color: var(--color-text-muted); font-size: 15px; margin-bottom: 16px; }
.service-card ul { display: flex; flex-direction: column; gap: 8px; }
.service-card ul li {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 14px; color: var(--color-text-muted);
}
.service-card ul li svg { width: 16px; height: 16px; color: var(--color-primary); margin-top: 3px; flex-shrink: 0; }
.service-card .tag {
  position: absolute; top: 28px; right: 28px;
  font-size: 12px; font-weight: 700; color: var(--color-text-muted);
  opacity: .5;
}

/* ---------- Process steps ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step { position: relative; padding: 30px 24px 26px; border-radius: var(--radius-lg); background: var(--color-bg); border: 1px solid var(--color-border); }
.process-step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-size: 34px;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
  margin-bottom: 14px;
}
.process-step h3 { font-size: 17px; margin-bottom: 8px; }
.process-step p { font-size: 14.5px; color: var(--color-text-muted); }
.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 46px; right: -26px;
  width: 24px; height: 2px;
  background: repeating-linear-gradient(90deg, var(--color-border) 0 6px, transparent 6px 10px);
  display: none;
}
@media (min-width: 900px) { .process-step:not(:last-child)::after { display: block; } }

/* ---------- About / split section ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split.reverse .split-media { order: 2; }
.split-media img { border-radius: var(--radius-lg); }
.split-copy .section-head { margin-bottom: 22px; }
.split-copy p { color: var(--color-text-muted); margin-bottom: 16px; font-size: 16px; }
.check-list { display: flex; flex-direction: column; gap: 14px; margin-top: 22px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; }
.check-list svg { width: 20px; height: 20px; color: #fff; background: var(--gradient-brand); border-radius: 50%; padding: 4px; flex-shrink: 0; }

/* ---------- Values grid ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-tile {
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}
.value-tile h3 { font-size: 18px; margin: 16px 0 8px; }
.value-tile p { font-size: 14.5px; color: var(--color-text-muted); }

/* ---------- Tech stack badges ---------- */
.stack-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}
.stack-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.stack-badge svg { width: 18px; height: 18px; color: var(--color-primary); }

/* ---------- CTA banner ---------- */
.cta-banner {
  border-radius: var(--radius-lg);
  padding: 64px;
  background: var(--gradient-hero);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-banner::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: 40px 40px;
  mask-image: radial-gradient(60% 90% at 20% 50%, rgba(0,0,0,0.6), transparent 75%);
}
.cta-banner .cta-copy { position: relative; z-index: 1; max-width: 520px; }
.cta-banner h2 { font-size: clamp(24px, 3vw, 32px); color: #fff; margin-bottom: 10px; }
.cta-banner p { color: var(--color-text-inverse-muted); font-size: 15.5px; }
.cta-banner .cta-actions { position: relative; z-index: 1; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 14px; max-width: 780px; margin: 0 auto; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg); overflow: hidden; }
.faq-question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  background: none; border: none; text-align: left;
  font-size: 16px; font-weight: 600;
}
.faq-question svg { width: 20px; height: 20px; color: var(--color-primary); flex-shrink: 0; transition: transform .3s var(--ease); }
.faq-item.is-open .faq-question svg { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-answer p { padding: 0 24px 20px; color: var(--color-text-muted); font-size: 14.5px; }

/* ---------- Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: flex-start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 18px; margin-bottom: 32px; }
.contact-info-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}
.contact-info-item h3 { font-size: 15px; margin-bottom: 4px; }
.contact-info-item p { font-size: 14.5px; color: var(--color-text-muted); }
.social-row { display: flex; gap: 10px; }
.social-btn {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all .25s var(--ease);
}
.social-btn svg { width: 18px; height: 18px; }
.social-btn:hover { background: var(--gradient-brand); color: #fff; border-color: transparent; transform: translateY(-3px); }

.map-placeholder {
  margin-top: 22px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-border);
  background:
    linear-gradient(rgba(79,70,229,0.04), rgba(34,211,238,0.04)),
    repeating-linear-gradient(45deg, rgba(17,24,39,0.02) 0 10px, transparent 10px 20px);
  padding: 40px 24px;
  text-align: center;
  color: var(--color-text-muted);
}
.map-placeholder svg { width: 30px; height: 30px; color: var(--color-primary); margin: 0 auto 10px; }
.map-placeholder strong { display:block; color: var(--color-text); margin-bottom: 4px; }

.contact-form {
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-size: 15px;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(79,70,229,0.12);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-error { display: none; font-size: 12.5px; color: #dc2626; margin-top: 6px; }
.form-group.has-error input,
.form-group.has-error textarea { border-color: #dc2626; }
.form-group.has-error .form-error { display: block; }
.form-note { font-size: 13px; color: var(--color-text-muted); margin-top: 14px; text-align: center; }
.form-success {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 12px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #047857;
  font-size: 14.5px;
  margin-bottom: 20px;
}
.form-success.is-visible { display: flex; }
.form-success svg { width: 20px; height: 20px; flex-shrink: 0; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse-muted);
  padding: 72px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border-dark);
}
.footer-brand .brand { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14.5px; max-width: 320px; margin-bottom: 20px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a { font-size: 14.5px; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-col .contact-line { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; margin-bottom: 12px; }
.footer-col .contact-line svg { width: 16px; height: 16px; margin-top: 3px; color: var(--color-accent); flex-shrink: 0; }
.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13.5px;
}
.footer-bottom .social-row .social-btn { border-color: var(--color-border-dark); color: var(--color-text-inverse-muted); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 46px; height: 46px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
  border: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
  z-index: 90;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top svg { width: 20px; height: 20px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal-stagger.is-visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: .05s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: .12s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: .19s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: .26s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: .33s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: .40s; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-media { order: -1; max-width: 460px; margin: 0 auto; }
  .split { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .value-props { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(1, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn-primary.header-cta { display: none; }
  .services-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .value-props { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .cta-banner { padding: 40px 28px; flex-direction: column; text-align: center; align-items: center; }
  .cta-banner .cta-actions { justify-content: center; }
  .section { padding: 72px 0; }

  .mobile-nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: var(--color-bg-dark);
    z-index: 99;
    padding: 20px 24px 40px;
    display: none;
    overflow-y: auto;
  }
  .mobile-nav.is-open { display: block; }
  .mobile-nav a {
    display: block;
    padding: 16px 4px;
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-inverse);
    border-bottom: 1px solid var(--color-border-dark);
  }
  .mobile-nav a.active { color: var(--color-accent); }
  .mobile-nav .btn { margin-top: 24px; }
}

@media (min-width: 721px) {
  .mobile-nav { display: none !important; }
}