/* ============================================================
   OPEN8 - landing styles
   ============================================================ */

:root {
  /* Brand */
  --accent: #29B6F6;
  --accent-strong: #0EA5E9;
  --accent-soft: rgba(41, 182, 246, 0.14);
  --accent-glow: rgba(41, 182, 246, 0.35);

  /* Ink (light surfaces) */
  --ink: #0b1220;
  --ink-strong: #050810;
  --ink-soft: #4b5563;
  --ink-mute: #6b7280;

  /* Surfaces */
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-line: #e5e7eb;
  --bg-line-strong: #d1d5db;

  /* Dark surfaces */
  --dark: #0b1220;
  --dark-2: #0f1729;
  --dark-3: #131c35;
  --dark-line: rgba(255, 255, 255, 0.08);
  --dark-line-strong: rgba(255, 255, 255, 0.16);
  --dark-ink: rgba(255, 255, 255, 0.92);
  --dark-ink-soft: rgba(255, 255, 255, 0.66);
  --dark-ink-mute: rgba(255, 255, 255, 0.5);

  /* Layout */
  --container: 1200px;
  --container-narrow: 820px;
  --radius: 14px;
  --radius-sm: 8px;

  /* Motion */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --fast: 200ms;
  --med: 380ms;
  --slow: 620ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  font-weight: 400;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--fast) var(--ease), opacity var(--fast) var(--ease); }

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
  color: var(--ink-strong);
}
h1 { font-size: clamp(2.5rem, 5.6vw, 4.5rem); }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.75rem); }
h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; }
strong { font-weight: 600; color: var(--ink-strong); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
}
.container.narrow { max-width: var(--container-narrow); }

/* ---------- Reveal on scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--slow) var(--ease), transform var(--slow) var(--ease);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- Eyebrow ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-soft);
  margin: 0 0 1.25rem;
}
.eyebrow-light { color: var(--dark-ink-soft); }

/* ---------- Logo (wordmark) ---------- */
.logo {
  display: inline-flex;
  align-items: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  color: var(--ink-strong);
  line-height: 1;
}
.logo-mark { display: inline-flex; align-items: center; gap: 0.02em; }
.logo-inf {
  color: var(--accent);
  font-size: 1.35em;
  margin-left: 0.06em;
  line-height: 0.6;
  position: relative;
  top: 0.04em;
  letter-spacing: -0.05em;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  background: transparent;
  transition: background var(--med) var(--ease), border-color var(--med) var(--ease), padding var(--med) var(--ease);
  padding: 1.25rem 0;
  border-bottom: 1px solid transparent;
}
.site-header[data-landing="true"] .logo { color: #fff; }
.site-header[data-landing="true"] .site-nav a { color: var(--dark-ink-soft); }
.site-header[data-landing="true"] .lang-switch { color: var(--dark-ink); border-color: var(--dark-line-strong); }
.site-header[data-landing="true"] .nav-toggle { color: #fff; }
.site-header[data-landing="true"].is-scrolled {
  background: rgba(11, 18, 32, 0.78);
  backdrop-filter: saturate(150%) blur(16px);
  border-bottom-color: var(--dark-line);
  padding: 0.85rem 0;
}
.site-header[data-landing="false"] {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(150%) blur(12px);
  border-bottom-color: var(--bg-line);
  padding: 0.85rem 0;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 2.25rem;
}
.site-nav a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 0.25rem 0;
}
.site-nav a:hover { color: var(--accent); }

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 32px;
  padding: 0 0.7rem;
  border: 1px solid var(--bg-line-strong);
  border-radius: 999px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--ink);
  transition: border-color var(--fast) var(--ease), color var(--fast) var(--ease), background var(--fast) var(--ease);
}
.lang-switch:hover { border-color: var(--accent); color: var(--accent); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0;
  color: var(--ink);
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  margin: 5px auto;
  transition: transform var(--fast) var(--ease), opacity var(--fast) var(--ease);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.6rem;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease),
              border-color var(--fast) var(--ease), transform var(--fast) var(--ease),
              box-shadow var(--fast) var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: var(--ink-strong);
  border-color: var(--accent);
  box-shadow: 0 12px 40px -12px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--dark-ink);
  border-color: var(--dark-line-strong);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent);
  color: var(--accent);
}
.btn-outline {
  background: transparent;
  color: var(--ink-strong);
  border-color: var(--ink-strong);
}
.btn-outline:hover { background: var(--ink-strong); color: #fff; }
.btn-arrow {
  display: inline-block;
  transition: transform var(--fast) var(--ease);
}
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: radial-gradient(120% 80% at 50% 0%, var(--dark-3) 0%, var(--dark-2) 50%, var(--dark) 100%);
  color: var(--dark-ink);
  overflow: hidden;
  isolation: isolate;
  padding: 9rem 0 5rem;
}
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(120% 80% at 50% 30%, #000 35%, transparent 80%);
  -webkit-mask-image: radial-gradient(120% 80% at 50% 30%, #000 35%, transparent 80%);
}
.hero-glow {
  position: absolute;
  z-index: 0;
  width: 900px; height: 900px;
  left: 50%;
  top: -200px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  filter: blur(40px);
  opacity: 0.6;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero-title {
  color: #fff;
  margin-bottom: 1.75rem;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}
.hero-title .accent {
  background: linear-gradient(90deg, var(--accent) 0%, #7dd3fc 70%, #fff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lede {
  font-size: clamp(1.05rem, 1.35vw, 1.2rem);
  color: var(--dark-ink-soft);
  max-width: 720px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
}
.hero-actions {
  display: flex;
  gap: 0.85rem;
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  left: 50%; bottom: 1.8rem;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 16px;
  display: grid;
  place-items: start center;
  padding-top: 8px;
  z-index: 2;
}
.scroll-indicator span {
  display: block;
  width: 2px; height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scroll-dot 1.7s var(--ease) infinite;
}
@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(16px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ============================================================
   Sections common
   ============================================================ */
.section {
  padding: 7rem 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 4rem;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}
.section-header .section-title {
  margin: 0;
}
.section-title { color: var(--ink-strong); }
.section-title-light { color: var(--dark-ink); }
.section-title .accent {
  color: var(--accent);
}
.section-lede {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 1.25rem auto 0;
  max-width: 680px;
}
.section-lede-light { color: var(--dark-ink-soft); }

/* ============================================================
   Services
   ============================================================ */
.section-services { background: var(--bg); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.service-tile {
  position: relative;
  padding: 2.6rem 2.2rem 2.4rem;
  border: 1px solid var(--bg-line);
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color var(--med) var(--ease), transform var(--med) var(--ease), box-shadow var(--med) var(--ease);
  overflow: hidden;
}
.service-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 0% 0%, var(--accent-soft), transparent 50%);
  opacity: 0;
  transition: opacity var(--med) var(--ease);
  pointer-events: none;
}
.service-tile:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 24px 60px -28px rgba(11, 18, 32, 0.18);
}
.service-tile:hover::before { opacity: 1; }
.service-num {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}
.service-title {
  margin-bottom: 0.85rem;
  font-size: 1.5rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
}
.service-desc {
  color: var(--ink-soft);
  margin: 0;
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

/* ============================================================
   Process
   ============================================================ */
.section-process { background: var(--bg-soft); }
.process-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--bg-line);
}
.process-step {
  position: relative;
  padding: 2.4rem 1.6rem 2.6rem;
  border-right: 1px solid var(--bg-line);
}
.process-step:last-child { border-right: 0; }
.process-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 28%;
  height: 2px;
  background: var(--accent);
  transition: width var(--med) var(--ease);
}
.process-step:hover::before { width: 100%; }
.process-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.4rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  opacity: 0.25;
}
.process-step:hover .process-num { opacity: 1; color: var(--accent); }
.process-title {
  font-size: 1.25rem;
  margin-bottom: 0.65rem;
}
.process-desc {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

/* ============================================================
   Stack (dark)
   ============================================================ */
.section-stack {
  background: var(--dark);
  color: var(--dark-ink);
  position: relative;
  overflow: hidden;
}
.section-stack::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(100% 70% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(100% 70% at 50% 0%, #000 30%, transparent 80%);
  pointer-events: none;
}
.section-stack .container { position: relative; z-index: 1; }
.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.stack-group {
  padding: 2rem 1.8rem;
  border: 1px solid var(--dark-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.005));
  transition: border-color var(--med) var(--ease), transform var(--med) var(--ease);
}
.stack-group:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.stack-group-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 1.25rem;
}
.stack-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.stack-list li {
  font-size: 0.95rem;
  color: var(--dark-ink-soft);
  position: relative;
  padding-left: 1.1rem;
}
.stack-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.6em;
  width: 5px; height: 1px;
  background: var(--accent);
}

/* ============================================================
   About
   ============================================================ */
.section-about { background: var(--bg); }
.about-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about-text .section-lede { margin-top: 1.5rem; max-width: none; }
.about-text p { color: var(--ink-soft); font-size: 1rem; }
.about-text p:last-of-type { margin-bottom: 0; }

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--bg-line);
}
.about-stat {
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--bg-line);
}
.about-stat:last-child { border-bottom: 0; }
.stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 3.4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--ink-strong);
  margin: 0 0 0.25rem;
  line-height: 1;
}
.stat-label {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0;
}

/* ============================================================
   Contact (dark)
   ============================================================ */
.section-contact {
  background: var(--dark);
  color: var(--dark-ink);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: 8rem 0;
}
.contact-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.contact-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(80% 70% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(80% 70% at 50% 50%, #000 30%, transparent 80%);
}
.contact-glow {
  position: absolute;
  width: 900px; height: 900px;
  bottom: -300px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  filter: blur(40px);
  opacity: 0.55;
}
.contact-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.contact-inner .section-title { margin-bottom: 0; }
.contact-card {
  border: 1px solid var(--dark-line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  backdrop-filter: blur(12px);
  padding: 2.4rem;
}
.contact-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--dark-line);
  color: var(--dark-ink);
}
.contact-row:first-child { padding-top: 0; }
a.contact-row { transition: color var(--fast) var(--ease); }
a.contact-row:hover .contact-row-value { color: var(--accent); }
.contact-row-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--dark-ink-mute);
}
.contact-row-value {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--dark-ink);
  transition: color var(--fast) var(--ease);
}
.contact-cta {
  width: 100%;
  margin-top: 1.6rem;
  justify-content: center;
}
.contact-star {
  color: var(--accent);
  font-weight: 600;
  margin-left: 0.15em;
}
.contact-note {
  margin-top: 1.1rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--dark-ink-mute);
}
.contact-note .contact-star { margin-left: 0; margin-right: 0.2em; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: #050810;
  color: var(--dark-ink-soft);
  padding-top: 4rem;
  border-top: 1px solid var(--dark-line);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  padding-bottom: 3rem;
}
.footer-brand .logo { color: #fff; font-size: 1.4rem; }
.footer-tagline {
  margin: 0.85rem 0 0;
  font-size: 0.88rem;
  color: var(--dark-ink-mute);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.footer-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  color: #fff;
  margin: 0 0 1rem;
}
.small {
  font-size: 0.9rem;
  margin: 0.4rem 0;
  color: var(--dark-ink-soft);
}
.site-footer a:hover { color: var(--accent); }
.footer-address {
  font-style: normal;
  margin: 0.4rem 0;
  line-height: 1.65;
}
.footer-bottom {
  border-top: 1px solid var(--dark-line);
  padding: 1.4rem 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom .small { margin: 0; }
.lang-line {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.lang-line a {
  letter-spacing: 0.15em;
  font-weight: 600;
}
.lang-line a[aria-current="page"] { color: #fff; }
.lang-line span { opacity: 0.4; }

/* ============================================================
   Sub-pages (page / project) - landing styles share most
   Header behavior for non-landing
   ============================================================ */
body.page-static .site-header,
body.page-project .site-header,
body.page-blog .site-header,
body.page-realizacje .site-header {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--bg-line);
  backdrop-filter: saturate(150%) blur(12px);
  padding: 0.85rem 0;
}
body.page-static .site-header .logo,
body.page-project .site-header .logo,
body.page-blog .site-header .logo,
body.page-realizacje .site-header .logo { color: var(--ink-strong); }

.page-static, .page-project, .page-blog, .page-realizacje { padding-top: 0; }

.page-hero, .project-hero {
  padding: 9rem 2rem 3rem;
  max-width: var(--container);
  margin: 0 auto;
}
.page-title, .project-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  margin: 0.5rem 0 1rem;
}
.page-body, .project-body {
  padding: 2rem 2rem 6rem;
  font-size: 1.05rem;
  color: var(--ink);
}
.page-body p, .project-body p { margin: 0 0 1.25rem; }
.page-body h2 {
  margin: 3rem 0 1.25rem;
  font-size: clamp(1.4rem, 2.6vw, 1.8rem);
}
.page-body a, .project-body a { color: var(--accent-strong); border-bottom: 1px solid currentColor; }
.page-body a:hover, .project-body a:hover { opacity: 0.7; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .site-nav {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(320px, 80vw);
    background: #0b1220;
    flex-direction: column;
    justify-content: center;
    padding: 2.5rem 2rem;
    gap: 1.4rem;
    transform: translateX(100%);
    transition: transform var(--med) var(--ease);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.4);
  }
  .site-header.nav-open .site-nav { transform: translateX(0); }
  .site-header.nav-open .site-nav a { color: var(--dark-ink) !important; font-size: 1.05rem; }
  .nav-toggle { display: block; }

  .services-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .process-step:nth-child(2n) { border-right: 0; }
  .process-step { border-bottom: 1px solid var(--bg-line); }
  .process-step:nth-last-child(-n+2) { border-bottom: 0; }
  .stack-grid { grid-template-columns: 1fr 1fr; }
  .about-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-cols { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .section { padding: 5rem 0; }
  .section-header { margin-bottom: 2.5rem; }
  .hero { padding: 8rem 0 4rem; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 320px; margin: 0 auto; }
  .hero-actions .btn { justify-content: center; }
  .process-steps { grid-template-columns: 1fr; }
  .process-step { border-right: 0; border-bottom: 1px solid var(--bg-line); }
  .process-step:last-child { border-bottom: 0; }
  .stack-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  .container, .header-inner { padding-left: 1.25rem; padding-right: 1.25rem; }
  .contact-card { padding: 1.8rem; }
  .service-tile { padding: 2rem 1.6rem; }
}