/* ==========================================================================
   DuMa-stav s.r.o. — Modern Design System (2026)
   ========================================================================== */

:root {
  /* Brand Palette */
  --brand-primary: #e53f20;
  --brand-primary-hover: #c83215;
  --brand-primary-light: #fff1ee;
  --brand-primary-subtle: rgba(229, 63, 32, 0.12);

  /* Neutral & Architectural Slate Tones */
  --bg-page: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-Warm: #f4f5f7;
  --bg-dark: #0f172a;
  --bg-dark-elevated: #1e293b;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-on-dark: #f8fafc;
  --text-on-dark-muted: #94a3b8;

  /* Semantic Status Colors */
  --color-success: #15803d;
  --color-success-bg: #f0fdf4;
  --color-error: #d93025;
  --color-error-bg: #fce8e6;

  /* Borders & Shadows */
  --border-light: #e2e8f0;
  --border-strong: #cbd5e1;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 4px 10px -3px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 40px -12px rgba(15, 23, 42, 0.14);
  --shadow-brand: 0 10px 25px -5px rgba(229, 63, 32, 0.35);

  /* Radii & Spacing */
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
  --radius-full: 9999px;

  --container-max: 1240px;
  --header-height: 5rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  overflow-x: hidden;
  background-color: var(--bg-page);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

/* Fluid Typography using clamp() */
h1,
h2,
h3,
h4 {
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.15rem, 1.5rem + 2.8vw, 3.6rem);
}

h2 {
  font-size: clamp(1.75rem, 1.3rem + 1.8vw, 2.65rem);
}

h3 {
  font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.45rem);
}

p {
  text-wrap: pretty;
}

.container {
  width: min(100% - 2.5rem, var(--container-max));
  margin-inline: auto;
}

/* Section Layout & Headers */
.section {
  padding-block: clamp(4rem, 3rem + 4vw, 6.5rem);
}

.section--subtle {
  background-color: var(--bg-subtle);
}

.section--dark {
  background-color: var(--bg-dark);
  color: var(--text-on-dark);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--text-on-dark);
}

.section-header {
  max-width: 46rem;
  margin-inline: auto;
  text-align: center;
  margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem);
}

.section-header--left {
  margin-inline: 0;
  text-align: left;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-primary);
  background-color: var(--brand-primary-light);
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section--dark .eyebrow {
  background-color: rgba(229, 63, 32, 0.2);
  color: #ff7a5c;
}

.section-lead {
  margin-top: 1rem;
  font-size: clamp(1.05rem, 0.98rem + 0.3vw, 1.2rem);
  color: var(--text-secondary);
}

.section--dark .section-lead {
  color: var(--text-on-dark-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.875rem 1.625rem;
  font-size: 0.975rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--brand-primary);
  color: #ffffff;
  box-shadow: var(--shadow-brand);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--brand-primary-hover);
  transform: translateY(-2px);
}

.btn--secondary {
  background-color: #ffffff;
  color: var(--text-primary);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  border-color: var(--text-primary);
  background-color: var(--bg-subtle);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 0.625rem 1.15rem;
  font-size: 0.875rem;
}

/* ==========================================================================
   Top Info Bar & Sticky Header
   ========================================================================== */
.topbar {
  background-color: var(--bg-dark);
  color: var(--text-on-dark-muted);
  font-size: 0.85rem;
  padding-block: 0.55rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.topbar__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.75rem;
}

.topbar__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-on-dark);
  font-weight: 500;
}

.topbar__item svg {
  color: var(--brand-primary);
  flex-shrink: 0;
}

.topbar__item a:hover {
  color: #ff7a5c;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-logo img,
.brand-logo svg {
  height: 3rem;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.main-nav__link {
  padding: 0.5rem 0.85rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

.main-nav__link:hover,
.main-nav__link.is-active {
  color: var(--brand-primary);
  background-color: var(--brand-primary-light);
}

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

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: #ffffff;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  padding-block: clamp(2.5rem, 2rem + 3vw, 5rem) clamp(3.5rem, 2.5rem + 3.5vw, 5.5rem);
  background:
    radial-gradient(circle at 85% 15%, rgba(229, 63, 32, 0.08), transparent 45%),
    radial-gradient(circle at 10% 80%, rgba(15, 23, 42, 0.04), transparent 40%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: clamp(2rem, 1.5rem + 2.5vw, 4rem);
}

.hero__lead {
  margin-top: 1.25rem;
  font-size: clamp(1.075rem, 1rem + 0.35vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 38rem;
}

.hero__actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.hero__highlights {
  margin-top: 2.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-light);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.stat-item__value {
  display: block;
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.15;
}

.stat-item__value span {
  color: var(--brand-primary);
}

.stat-item__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.hero__visual {
  position: relative;
}

.hero__main-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid #ffffff;
  background-color: var(--bg-dark);
}

.hero__main-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.hero__floating-badge {
  position: absolute;
  bottom: 1.25rem;
  left: 1.25rem;
  right: 1.25rem;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(10px);
  color: #ffffff;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.hero__floating-badge strong {
  display: block;
  font-size: 0.95rem;
}

.hero__floating-badge span {
  font-size: 0.8rem;
  color: #cbd5e1;
}

.hero__badge-pill {
  background-color: var(--brand-primary);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 0.75rem !important;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ==========================================================================
   Partner Brands Bar
   ========================================================================== */
.partners-bar {
  background-color: #ffffff;
  border-block: 1px solid var(--border-light);
  padding-block: 1.75rem;
}

.partners-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
}

.partners-bar__label {
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.partners-bar__logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.partner-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.partner-pill::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background-color: var(--brand-primary);
}

/* ==========================================================================
   About Section (#o-nas)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2rem, 1.5rem + 3vw, 4.5rem);
}

.about-media {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.about-media__primary {
  grid-column: 1 / 8;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-media__secondary {
  grid-column: 8 / 13;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.about-media__primary img,
.about-media__secondary img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.experience-card {
  background-color: var(--bg-dark);
  color: #ffffff;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}

.experience-card__num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1;
}

.experience-card__text {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #e2e8f0;
  font-weight: 600;
}

.about-content p + p {
  margin-top: 1rem;
}

.about-content p {
  color: var(--text-secondary);
  font-size: 1.03rem;
}

.feature-check-list {
  margin-top: 1.75rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem 1.25rem;
}

.feature-check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.feature-check-item svg {
  color: var(--brand-primary);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

/* ==========================================================================
   Services Section (#sluzby) with @container queries
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr));
  gap: 1.5rem;
}

.service-card-wrapper {
  container-type: inline-size;
}

.service-card {
  height: 100%;
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(229, 63, 32, 0.4);
}

.service-card__icon {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-md);
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.96rem;
}

.service-card__tags {
  margin-top: auto;
  padding-top: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.service-card__tag {
  font-size: 0.775rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
}

@container (min-width: 440px) {
  .service-card {
    flex-direction: row;
    align-items: flex-start;
  }
}

/* ==========================================================================
   Why Insulate (#proc-zateplit) — 10 Reasons + Visual Impact
   ========================================================================== */
.benefits-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 1.5rem + 2.5vw, 4rem);
  align-items: start;
}

.benefits-summary {
  background: linear-gradient(145deg, var(--bg-dark) 0%, var(--bg-dark-elevated) 100%);
  color: #ffffff;
  padding: clamp(1.75rem, 1.5rem + 1.5vw, 2.75rem);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}

.benefits-summary h3 {
  color: #ffffff;
  font-size: 1.55rem;
  margin-bottom: 1rem;
}

.benefits-summary p {
  color: #cbd5e1;
  font-size: 0.98rem;
}

.benefits-summary p + p {
  margin-top: 0.9rem;
}

.heat-loss-callout {
  margin-block: 1.5rem;
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background-color: rgba(229, 63, 32, 0.16);
  border: 1px solid rgba(229, 63, 32, 0.4);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.heat-loss-callout__pct {
  font-size: 2.35rem;
  font-weight: 800;
  color: #ff6b4a;
  line-height: 1;
}

.heat-loss-callout__desc {
  font-size: 0.9rem;
  color: #f8fafc;
  font-weight: 600;
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.reason-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  box-shadow: var(--shadow-sm);
}

.reason-card__num {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-sm);
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  font-weight: 800;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.reason-card h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.reason-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Subsidies Callout (#dotace) — Nová zelená úsporám
   ========================================================================== */
.subsidy-banner {
  background: linear-gradient(135deg, #064e3b 0%, #0f172a 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
  box-shadow: var(--shadow-lg);
}

.subsidy-banner__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(52, 211, 153, 0.2);
  color: #6ee7b7;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.subsidy-banner h2 {
  color: #ffffff;
}

.subsidy-banner p {
  margin-top: 1rem;
  color: #d1fae5;
  font-size: 1.05rem;
}

.subsidy-points {
  display: grid;
  gap: 0.9rem;
  background: rgba(255, 255, 255, 0.07);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.subsidy-point {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: #f8fafc;
}

.subsidy-point svg {
  color: #34d399;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

/* ==========================================================================
   Technology Timeline (#technologie) — 6 Steps
   ========================================================================== */
.tech-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.tech-step {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.tech-step:hover {
  background-color: rgba(255, 255, 255, 0.07);
  border-color: rgba(229, 63, 32, 0.55);
}

.tech-step__header {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1rem;
}

.tech-step__num {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background-color: var(--brand-primary);
  color: #ffffff;
  font-weight: 800;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tech-step h3 {
  font-size: 1.15rem;
  color: #ffffff;
}

.tech-step p {
  font-size: 0.925rem;
  color: var(--text-on-dark-muted);
}

/* ==========================================================================
   Gallery Section (#realizace) & Native <dialog> Lightbox
   ========================================================================== */
.gallery-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 2.25rem;
}

.filter-btn {
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-strong);
  background-color: #ffffff;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover,
.filter-btn.is-active {
  background-color: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #ffffff;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 1.25rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--bg-Warm);
  border: 1px solid var(--border-light);
  cursor: pointer;
  padding: 0;
  display: block;
  width: 100%;
  text-align: left;
  box-shadow: var(--shadow-sm);
}

.gallery-item[hidden] {
  display: none !important;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.gallery-item:hover img,
.gallery-item:focus-visible img {
  transform: scale(1.05);
}

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(15, 23, 42, 0.82) 100%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.25s ease;
  color: #ffffff;
}

.gallery-item:hover .gallery-item__overlay,
.gallery-item:focus-visible .gallery-item__overlay {
  opacity: 1;
}

.gallery-item__caption {
  font-size: 0.875rem;
  font-weight: 600;
}

.gallery-more {
  margin-top: 2.5rem;
  text-align: center;
}

/* Native <dialog closedby="any"> Lightbox */
.lightbox-dialog {
  margin: auto;
  padding: 0;
  border: none;
  border-radius: var(--radius-lg);
  background-color: var(--bg-dark);
  color: #ffffff;
  max-width: min(92vw, 1060px);
  max-height: 90dvh;
  width: 100%;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.lightbox-dialog::backdrop {
  background-color: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(6px);
}

.lightbox-dialog__inner {
  display: flex;
  flex-direction: column;
  max-height: 90dvh;
}

.lightbox-dialog__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.lightbox-dialog__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #e2e8f0;
}

.lightbox-dialog__close {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #ffffff;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.lightbox-dialog__close:hover {
  background: var(--brand-primary);
}

.lightbox-dialog__stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #090d16;
  min-height: 320px;
  max-height: calc(90dvh - 4rem);
}

.lightbox-dialog__img {
  max-height: calc(90dvh - 5rem);
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(15, 23, 42, 0.75);
  color: #ffffff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
}

.lightbox-nav--prev {
  left: 1rem;
}

.lightbox-nav--next {
  right: 1rem;
}

/* ==========================================================================
   Contact & Inquiry Form Section (#kontakt)
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(2rem, 1.5rem + 2.5vw, 4rem);
  align-items: start;
}

.contact-cards {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.contact-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.contact-card__icon {
  width: 2.85rem;
  height: 2.85rem;
  border-radius: var(--radius-md);
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.contact-card p,
.contact-card a {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-card a.phone-link {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
}

.contact-card a.phone-link:hover {
  color: var(--brand-primary);
}

.map-box {
  margin-top: 1.25rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-Warm);
}

.map-box iframe {
  width: 100%;
  height: 250px;
  border: 0;
  display: block;
}

/* Inquiry Form Card & :user-invalid / :user-valid styling */
.form-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: clamp(1.75rem, 1.5rem + 1.5vw, 2.75rem);
  box-shadow: var(--shadow-lg);
}

.form-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.4rem;
}

.form-card__sub {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.field {
  margin-bottom: 1.15rem;
  display: flex;
  flex-direction: column;
}

.field label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.hint {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.75rem 0.95rem;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.field textarea {
  min-height: 6.5rem;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--brand-primary-subtle);
}

.error-msg {
  display: none;
  color: var(--color-error);
  font-size: 0.825rem;
  font-weight: 600;
  margin-top: 0.3rem;
}

/* Deferred validation states (:user-invalid & fallback) */
.field input:user-invalid,
.field textarea:user-invalid,
.field input.user-invalid-fallback,
.field textarea.user-invalid-fallback {
  border-color: var(--color-error);
  background-color: var(--color-error-bg);
}

.field input:user-invalid + .error-msg,
.field textarea:user-invalid + .error-msg,
.field input.user-invalid-fallback + .error-msg,
.field textarea.user-invalid-fallback + .error-msg {
  display: block;
}

.field input:user-valid,
.field textarea:user-valid,
.field input.user-valid-fallback,
.field textarea.user-valid-fallback {
  border-color: var(--color-success);
}

.form-status {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-success-bg);
  border: 1px solid #86efac;
  color: var(--color-success);
  font-weight: 600;
  font-size: 0.925rem;
}

.form-status.is-error {
  background-color: var(--color-error-bg);
  border-color: #fca5a5;
  color: var(--color-error);
}

.hp-guard {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-dark);
  color: var(--text-on-dark-muted);
  padding-block: 3.5rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 0.85fr 0.85fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer h4 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.site-footer__links {
  display: grid;
  gap: 0.5rem;
}

.site-footer__links a:hover {
  color: #ffffff;
}

.site-footer__bottom {
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 992px) {
  .hero__grid,
  .about-grid,
  .benefits-layout,
  .subsidy-banner,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .benefits-summary {
    position: static;
  }

  .tech-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .main-nav {
    display: none;
  }

  .main-nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: #ffffff;
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    align-items: stretch;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .topbar {
    display: none;
  }

  .hero__highlights {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .feature-check-list,
  .reasons-grid,
  .tech-steps,
  .form-row,
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .about-media {
    grid-template-columns: 1fr;
  }

  .about-media__primary,
  .about-media__secondary {
    grid-column: 1 / -1;
  }
}