/* ===========================================================
   Klimatyzatory Wrocław — arkusz stylów
   Bez zewnętrznych zależności (lepsze Core Web Vitals / SEO)
   =========================================================== */

:root {
  --blue-900: #0a2540;
  --blue-700: #0d3b66;
  --blue-500: #1769ff;
  --blue-400: #3b82f6;
  --cyan-400: #22d3ee;
  --cyan-300: #67e8f9;
  --ink: #0f172a;
  --slate: #475569;
  --slate-light: #64748b;
  --bg: #f6f9fc;
  --white: #ffffff;
  --line: #e2e8f0;
  --green: #16a34a;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
  --shadow: 0 12px 30px rgba(13, 59, 102, .12);
  --shadow-lg: 0 24px 60px rgba(13, 59, 102, .18);
  --radius: 16px;
  --radius-sm: 10px;
  --container: 1160px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--blue-500); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; color: var(--blue-900); margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.25rem); letter-spacing: -.01em; }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1rem; color: var(--slate); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 72px 0; }
.section--tight { padding: 48px 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1.02rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary {
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
  color: #fff;
  box-shadow: 0 10px 24px rgba(23, 105, 255, .35);
}
.btn--ghost {
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border-color: rgba(255, 255, 255, .55);
}
.btn--dark { background: var(--blue-900); color: #fff; }
.btn--lg { padding: 17px 34px; font-size: 1.1rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 70px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.18rem;
  color: var(--blue-900);
}
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
  color: #fff; font-size: 1.25rem;
}
.nav-links { display: flex; align-items: center; gap: 6px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--blue-900);
  font-weight: 600;
  font-size: .96rem;
  padding: 8px 12px;
  border-radius: 8px;
}
.nav-links a:hover { background: #eef4ff; text-decoration: none; }
.nav-phone {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--blue-900); color: #fff;
  padding: 10px 18px; border-radius: 999px; font-weight: 700;
}
.nav-phone:hover { text-decoration: none; background: var(--blue-700); }
.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(34, 211, 238, .35), transparent 60%),
    linear-gradient(160deg, var(--blue-900) 0%, var(--blue-700) 55%, #11508a 100%);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(700px 300px at 15% 110%, rgba(23,105,255,.4), transparent 60%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 40px;
  align-items: center;
  padding: 84px 0 92px;
}
.hero h1, .hero h2 { color: #fff; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  padding: 7px 14px; border-radius: 999px;
  font-size: .85rem; font-weight: 600; letter-spacing: .03em;
  margin-bottom: 18px;
}
.hero p.lead { color: #d8e7ff; font-size: 1.18rem; max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 30px; }
.hero-badges div { display: flex; align-items: center; gap: 8px; font-size: .95rem; color: #cfe2ff; }
.hero-badges strong { color: #fff; }

.hero-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 22px;
  padding: 28px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(6px);
}
.hero-card h3 { color: #fff; margin-bottom: 14px; }
.price-row {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 12px 0; border-bottom: 1px dashed rgba(255,255,255,.2);
}
.price-row:last-child { border-bottom: 0; }
.price-row span { color: #cfe2ff; }
.price-row b { color: #fff; font-size: 1.15rem; }
.price-tag {
  margin-top: 16px; text-align: center;
  background: linear-gradient(135deg, var(--cyan-400), var(--blue-400));
  color: #06283d; font-weight: 800; padding: 12px; border-radius: 12px;
}

/* ---------- Trust bar ---------- */
.trustbar {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.trustbar-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 18px; padding: 26px 0; text-align: center;
}
.trustbar-grid .num { font-size: 2rem; font-weight: 800; color: var(--blue-500); }
.trustbar-grid .lbl { color: var(--slate); font-size: .92rem; }

/* ---------- Generic grids / cards ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .ico {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.5rem;
  background: linear-gradient(135deg, #e0edff, #d3f7ff);
  margin-bottom: 16px;
}
.card h3 { margin-bottom: 8px; }
.card p { margin-bottom: 0; font-size: .98rem; }
.card a.more { font-weight: 700; display: inline-block; margin-top: 12px; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-head .eyebrow {
  color: var(--blue-500); font-weight: 800; letter-spacing: .08em;
  text-transform: uppercase; font-size: .82rem;
}
.section-head p { font-size: 1.08rem; }

/* ---------- Feature split ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 10px 0; color: var(--ink); font-weight: 500;
}
.checklist li::before {
  content: "✓"; flex: 0 0 24px;
  width: 24px; height: 24px; border-radius: 50%;
  background: #dcfce7; color: var(--green);
  display: grid; place-items: center; font-weight: 800; font-size: .85rem;
}
.media-box {
  border-radius: 20px; padding: 40px;
  background: linear-gradient(160deg, var(--blue-700), var(--blue-900));
  color: #fff; box-shadow: var(--shadow);
}
.media-box h3 { color: #fff; }
.media-box .big { font-size: 3rem; font-weight: 800; color: var(--cyan-300); }

/* ---------- Steps ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.step { position: relative; padding: 26px; background: var(--white); border:1px solid var(--line); border-radius: var(--radius); }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
  color: #fff; font-weight: 800; font-size: 1.2rem; margin-bottom: 14px;
}
.step h3 { font-size: 1.08rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(34,211,238,.4), transparent 60%),
    linear-gradient(135deg, var(--blue-700), var(--blue-900));
  color: #fff; border-radius: 24px; padding: 52px; text-align: center;
  box-shadow: var(--shadow-lg);
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #d8e7ff; font-size: 1.1rem; max-width: 620px; margin: 0 auto 26px; }
.cta-band .btn--ghost { background: rgba(255,255,255,.16); }

/* ---------- FAQ ---------- */
.faq details {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 4px 22px; margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
}
.faq summary {
  cursor: pointer; font-weight: 700; color: var(--blue-900);
  padding: 16px 0; list-style: none; font-size: 1.05rem;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; color: var(--blue-500); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 18px; margin: 0; }

/* ---------- Areas / tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tag {
  background: var(--white); border: 1px solid var(--line);
  padding: 8px 16px; border-radius: 999px; font-weight: 600;
  color: var(--blue-900); font-size: .92rem;
}

/* ---------- Prose (article pages) ---------- */
.page-hero {
  background: linear-gradient(160deg, var(--blue-900), var(--blue-700));
  color: #fff; padding: 64px 0;
}
.page-hero h1 { color: #fff; }
.page-hero p { color: #d8e7ff; font-size: 1.12rem; max-width: 720px; }
.breadcrumbs { font-size: .88rem; color: #b9d1f5; margin-bottom: 14px; }
.breadcrumbs a { color: #cfe2ff; }

.prose { max-width: 820px; }
.prose h2 { margin-top: 1.6em; }
.prose ul { padding-left: 1.2em; color: var(--slate); }
.prose li { margin-bottom: .4em; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--blue-900); color: #c7d6ee; padding: 56px 0 28px; margin-top: 20px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; margin: 0 0 14px; font-size: 1.02rem; }
.site-footer a { color: #c7d6ee; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.footer-brand .logo {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-400));
  display: grid; place-items: center; color: #fff; font-size: 1.3rem; margin-bottom: 14px;
}
.footer-bottom {
  margin-top: 36px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: .86rem; color: #92a8c9;
}

/* ---------- Floating call button (mobile) ---------- */
.fab-call {
  position: fixed; right: 18px; bottom: 18px; z-index: 60;
  display: none; align-items: center; gap: 8px;
  background: var(--green); color: #fff; font-weight: 800;
  padding: 14px 20px; border-radius: 999px;
  box-shadow: 0 12px 30px rgba(22,163,74,.45);
}
.fab-call:hover { text-decoration: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; padding: 60px 0; }
  .hero-card { order: -1; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .trustbar-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
}

@media (max-width: 640px) {
  .section { padding: 52px 0; }
  .nav-links { display: none; }
  .nav-phone { padding: 9px 14px; font-size: .9rem; }
  .grid-2, .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 36px 22px; }
  .fab-call { display: inline-flex; }
  .hero-cta .btn { flex: 1 1 100%; justify-content: center; }
}