/* ==========================================================================
   Articheck — web design system
   Tmavé pozadie + oranžový akcent (parita s appkou / DesignSystem).
   ========================================================================== */

:root {
  /* Paleta (mirror DS dark) */
  --bg:            #0E0E10;
  --bg-elev:       #17171A;
  --card:          #1C1C20;
  --card-hover:    #232329;
  --border:        #2C2C33;
  --border-subtle: #232329;

  --text:          #F5F5F7;
  --text-2:        #B8B8C0;
  --text-3:        #7C7C85;

  --accent:        #FF7A1A;
  --accent-soft:   #FF9B4D;
  --accent-deep:   #E85D00;
  --green:         #43C463;

  --radius-sm: 10px;
  --radius:    16px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow: 0 20px 60px rgba(0,0,0,.45);
  --maxw: 1120px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

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

/* Ambient glow za obsahom (subtílny brand touch) */
.glow-bg { position: relative; }
.glow-bg::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 400px at 80% -10%, rgba(255,122,26,.14), transparent 60%),
    radial-gradient(700px 500px at 0% 20%, rgba(67,196,99,.06), transparent 60%);
  pointer-events: none; z-index: 0;
}

/* ---------- Navbar ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14,14,16,.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .3px; }
.brand .dot { width: 42px; height: 42px; object-fit: contain; }
.nav-links { display: flex; gap: 26px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-2); font-weight: 600; font-size: 15px; transition: color .2s; }
.nav-links a:hover { color: var(--text); }

/* Prepínač jazyka */
.lang { display: inline-flex; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-pill); overflow: hidden; }
.lang button {
  border: 0; background: transparent; color: var(--text-3);
  font: 600 13px/1 var(--font); padding: 8px 12px; cursor: pointer; transition: all .2s;
}
.lang button.active { background: var(--accent); color: #fff; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-weight: 700; font-size: 16px; padding: 14px 24px;
  border-radius: var(--radius-pill); border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: linear-gradient(180deg, var(--accent-soft), var(--accent)); color: #fff; box-shadow: 0 10px 30px rgba(255,122,26,.35); }
.btn-primary:hover { box-shadow: 0 14px 40px rgba(255,122,26,.5); }
.btn-ghost { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.14); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.09); }

/* Store badges */
.stores { display: flex; gap: 14px; flex-wrap: wrap; }
.store {
  display: inline-flex; align-items: center; gap: 12px;
  background: #000; border: 1px solid var(--border); border-radius: 14px;
  padding: 10px 18px; min-width: 200px; transition: transform .15s, border-color .2s;
}
.store:hover { transform: translateY(-2px); border-color: var(--accent); }
.store svg { width: 28px; height: 28px; flex: none; }
.store .s-small { display: block; font-size: 11px; color: var(--text-3); line-height: 1.2; margin-bottom: 2px; }
.store .s-big { display: block; font-size: 18px; font-weight: 700; color: #fff; line-height: 1.1; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 90px 0 70px; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; font-size: 13px; }
.hero h1 { font-size: clamp(38px, 5vw, 60px); line-height: 1.05; font-weight: 850; letter-spacing: -.5px; margin: 16px 0; }
.hero h1 .hl { color: var(--accent); }
.hero p.lead { font-size: 20px; color: var(--text-2); max-width: 560px; margin-bottom: 30px; }
.hero-actions { display: flex; flex-direction: column; gap: 22px; }

.phone-mock {
  border-radius: 34px; overflow: hidden; border: 1px solid var(--border);
  box-shadow: var(--shadow); background: var(--card); aspect-ratio: 9/19.5; max-width: 320px; margin: 0 auto;
}
.phone-mock img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Sections ---------- */
section.block { padding: 80px 0; position: relative; z-index: 1; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-head h2 { font-size: clamp(28px, 3.5vw, 40px); font-weight: 800; letter-spacing: -.4px; }
.section-head p { color: var(--text-2); font-size: 18px; margin-top: 12px; }

/* Feature grid */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: 28px; transition: transform .18s, border-color .2s, background .2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--border); background: var(--card-hover); }
.card .ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(255,122,26,.14); color: var(--accent); font-size: 22px; margin-bottom: 16px;
}
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--text-2); font-size: 15px; }

/* Steps (návody) */
.steps { display: grid; gap: 18px; max-width: 820px; margin: 0 auto; }
.step {
  display: grid; grid-template-columns: 48px 1fr; gap: 20px; align-items: start;
  background: var(--card); border: 1px solid var(--border-subtle); border-radius: var(--radius);
  padding: 22px 24px;
}
.step .num {
  width: 44px; height: 44px; border-radius: var(--radius-pill); display: grid; place-items: center;
  background: linear-gradient(180deg, var(--accent-soft), var(--accent)); color: #fff; font-weight: 800; font-size: 18px;
}
.step h3 { font-size: 18px; margin-bottom: 6px; }
.step p { color: var(--text-2); font-size: 15px; }

/* CTA band */
.cta {
  text-align: center; background:
    radial-gradient(500px 300px at 50% 0%, rgba(255,122,26,.18), transparent 70%), var(--bg-elev);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 56px 32px;
}
.cta h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; }
.cta p { color: var(--text-2); font-size: 18px; margin: 12px auto 28px; max-width: 520px; }

/* ---------- Legal / prose ---------- */
.prose { max-width: 780px; margin: 0 auto; padding: 40px 0 20px; }
.prose h1 { font-size: 36px; font-weight: 800; margin-bottom: 8px; }
.prose .updated { color: var(--text-3); font-size: 14px; margin-bottom: 28px; }
.prose h2 { font-size: 22px; margin: 32px 0 12px; color: var(--text); }
.prose p, .prose li { color: var(--text-2); margin-bottom: 12px; }
.prose ul { padding-left: 22px; margin-bottom: 16px; }
.prose a { color: var(--accent); }

/* ---------- Footer ---------- */
footer.foot { border-top: 1px solid var(--border-subtle); padding: 48px 0 40px; background: var(--bg-elev); }
.foot-grid { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.foot-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-3); margin-bottom: 14px; }
.foot-col a { display: block; color: var(--text-2); font-size: 15px; margin-bottom: 10px; transition: color .2s; }
.foot-col a:hover { color: var(--accent); }
.foot-bottom { margin-top: 36px; color: var(--text-3); font-size: 14px; }

/* ---------- Utilities ---------- */
.center { text-align: center; }
.hidden { display: none !important; }
[data-i18n] { transition: opacity .12s; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .features { grid-template-columns: 1fr 1fr; }
  .nav-links { gap: 16px; }
  .nav-links .hide-sm { display: none; }
}
@media (max-width: 620px) {
  .features { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
  .store { min-width: 0; flex: 1; }
  .nav-links a.nav-item { display: none; }
}