/* ═══════════════════════════════════════════════════════
   all4automation – hlavní stylesheet
   Světlý režim jako výchozí, tmavý přes class="dark" na <body>
═══════════════════════════════════════════════════════ */

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Light theme */
  --bg:          #ffffff;
  --bg-alt:      #f5f7fa;
  --bg-card:     #ffffff;
  --bg-header:   rgba(255,255,255,0.95);
  --border:      #e2e8f0;
  --text:        #1a202c;
  --text-muted:  #64748b;
  --accent:      #0052cc;
  --accent-hover:#003d99;
  --accent-light:#e8f0fe;
  --success:     #0a7c2e;
  --success-bg:  #dcfce7;
  --error-color: #c0392b;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow-md:   0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:   0 8px 32px rgba(0,0,0,.12);
  --radius:      12px;
  --radius-sm:   8px;
  --transition:  .22s ease;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

body.dark {
  --bg:          #0d1117;
  --bg-alt:      #161b22;
  --bg-card:     #1c2230;
  --bg-header:   rgba(13,17,23,0.96);
  --border:      #30363d;
  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --accent:      #58a6ff;
  --accent-hover:#79b8ff;
  --accent-light:#1c2d4a;
  --success:     #3fb950;
  --success-bg:  #122822;
  --error-color: #f85149;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.3);
  --shadow-md:   0 4px 16px rgba(0,0,0,.4);
  --shadow-lg:   0 8px 32px rgba(0,0,0,.5);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
ul { list-style: none; }

/* ── Container ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Sections ── */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }

.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -.02em;
}
.section-head p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}
.btn-sm { padding: 8px 16px; font-size: .875rem; }
.btn-lg { padding: 15px 36px; font-size: 1.05rem; }

/* ── Header ── */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition), border-color var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo-link { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 40px; width: auto; object-fit: contain; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition);
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
  border-radius: 2px;
}
.main-nav a:hover { color: var(--accent); }
.main-nav a:hover::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 12px; }

.dark-toggle {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  transition: all var(--transition);
  color: var(--text);
}
.dark-toggle:hover { background: var(--accent-light); border-color: var(--accent); }
body.light .icon-moon { display: none; }
body.dark  .icon-sun  { display: none; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── Hero ── */
.hero {
  padding: 96px 0 80px;
  background: var(--bg);
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}
.badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.hero-text h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.03em;
  margin-bottom: 20px;
}
.accent { color: var(--accent); }
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
  width: 100%;
  max-width: 360px;
}
.hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.hero-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.hero-card span { font-weight: 700; font-size: 1rem; color: var(--accent); }
.hero-card small { font-size: .78rem; color: var(--text-muted); }
.hc1 { grid-column: span 2; }

/* ── USP Strip ── */
.usp-strip {
  background: var(--accent);
  padding: 24px 0;
}
.usp-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.usp-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.usp-icon { font-size: 1.6rem; flex-shrink: 0; }
.usp-item strong { display: block; font-size: .9rem; font-weight: 700; }
.usp-item small { font-size: .78rem; opacity: .85; }

/* ── Category Tabs ── */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.cat-tab {
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.cat-tab:hover { border-color: var(--accent); color: var(--accent); }
.cat-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ── Product Grid ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), opacity .3s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.product-card.hidden { display: none; }

.card-img-wrap {
  position: relative;
  background: var(--bg-alt);
  aspect-ratio: 16/10;
  overflow: hidden;
}
.card-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
  transition: transform .4s ease;
}
.product-card:hover .card-img { transform: scale(1.04); }

.card-badge {
  position: absolute;
  top: 12px; left: 12px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 12px;
}
.badge-rgb   { background: linear-gradient(135deg, #ff6b6b, #ffd93d, #6bcb77, #4d96ff); color: #fff; }
.badge-new   { background: #7c3aed; color: #fff; }
.badge-kiosk { background: #0052cc; color: #fff; }
.badge-ip    { background: #0a7c2e; color: #fff; }

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 12px;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.cat-label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.model-name {
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-light);
  padding: 3px 10px;
  border-radius: 10px;
}
.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
}

/* Variant tags */
.variant-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.variant-tags span {
  font-size: .72rem;
  font-weight: 600;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: 6px;
}

/* Spec list */
.spec-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: .83rem;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.spec-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}
.spec-list li span:first-child { color: var(--text-muted); flex-shrink: 0; }
.spec-list li span:last-child  { font-weight: 500; text-align: right; }

.card-desc {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex: 1;
}

/* ── Kiosk grid ── */
.kiosk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.kiosk-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.kiosk-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.kiosk-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.kiosk-card p { font-size: .875rem; color: var(--text-muted); line-height: 1.6; }
.kiosk-cta { text-align: center; }
.kiosk-cta p { margin-bottom: 16px; color: var(--text-muted); }

/* ── Form ── */
.form-wrap {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group-full { grid-column: span 2; margin-bottom: 20px; }
label {
  font-size: .875rem;
  font-weight: 600;
  color: var(--text);
}
.label-section {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: 10px;
}
input, select, textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: .9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
input.invalid, select.invalid, textarea.invalid {
  border-color: var(--error-color);
}
textarea { resize: vertical; min-height: 120px; }
select { cursor: pointer; }

.form-error {
  font-size: .78rem;
  color: var(--error-color);
  display: none;
}
.form-group.show-error .form-error { display: block; }

/* Checkboxes */
.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .875rem;
  font-weight: 400;
  cursor: pointer;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.checkbox-label:hover { border-color: var(--accent); background: var(--accent-light); }
.checkbox-label input[type=checkbox] {
  width: 16px; height: 16px;
  flex-shrink: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
.checkbox-tos {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-weight: 400;
}
.checkbox-tos a { color: var(--accent); font-weight: 600; }

.form-submit {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.form-note { font-size: .8rem; color: var(--text-muted); }

.form-success {
  margin-top: 20px;
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .9rem;
}
.form-error-msg {
  margin-top: 20px;
  background: #fef2f2;
  color: var(--error-color);
  border: 1px solid var(--error-color);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .9rem;
}
body.dark .form-error-msg { background: #2d1b1b; }
.success-icon { font-size: 1.2rem; }

/* ── Footer ── */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: 60px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-logo { height: 36px; margin-bottom: 12px; }
.footer-brand p { font-size: .875rem; color: var(--text-muted); line-height: 1.6; }
.footer-links h4,
.footer-contact h4 {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.footer-links a {
  display: block;
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-contact p { font-size: .875rem; color: var(--text-muted); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 0;
  font-size: .8rem;
  color: var(--text-muted);
}

/* ── OBP page ── */
.obp-content {
  max-width: 800px;
  margin: 80px auto;
  padding: 0 24px 80px;
}
.obp-content h1 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.obp-content .subtitle { color: var(--text-muted); margin-bottom: 40px; }
.obp-content h2 { font-size: 1.2rem; font-weight: 700; margin: 32px 0 10px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.obp-content p, .obp-content li { font-size: .9rem; line-height: 1.7; color: var(--text-muted); margin-bottom: 8px; }
.obp-content ul { padding-left: 20px; list-style: disc; }
.obp-placeholder {
  background: var(--bg-alt);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .usp-inner { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero { padding: 64px 0 52px; }

  .main-nav {
    display: none;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: var(--bg-header);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .burger { display: flex; }

  .form-row { grid-template-columns: 1fr; }
  .form-group-full { grid-column: span 1; }
  .form-wrap { padding: 24px; }

  .usp-inner { grid-template-columns: 1fr 1fr; gap: 12px; }
  .usp-item { flex-direction: column; text-align: center; gap: 6px; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }

  .product-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .usp-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .hero-cta { flex-direction: column; }
  .checkbox-grid { grid-template-columns: 1fr; }
}
