/* ==========================================================================
   Belvela - Modern Clean CSS (Vanilla CSS)
 
   ========================================================================== */

/* 1. CSS Proměnné & Design systém */
:root {
  --color-primary: #0066cc;
  --color-primary-hover: #0052a3;
  --color-heading: #556270;
  --color-text: #444444;
  --color-text-muted: #777777;
  --color-bg: #ffffff;
  --color-bg-light: #f2f4f6;
  --color-bg-dark: #3b4654;
  --color-bg-darker: #2b343f;
  --color-surface: #ffffff;
  --color-border: #e2e6eb;
  --color-border-dark: rgba(255, 255, 255, 0.15);
  --color-white: #ffffff;

  --font-logo: "Lobster", cursive;
  --font-heading: "Raleway", sans-serif;
  --font-nav: "Poppins", sans-serif;
  --font-body: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.12);
  --transition: 0.3s ease;
  --container-max: 1240px;
}

/* 2. Reset a základní typografie */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100%;
  overscroll-behavior-x: none;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.3;
  font-weight: 700;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 3. Společné utility třídy */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 70px 0;
}

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

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

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 13px;
  letter-spacing: 2px;
  font-weight: 600;
  text-transform: uppercase;
  color: #8893a0;
  margin-bottom: 8px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.section-title h2::after {
  content: "";
  display: inline-block;
  width: 80px;
  height: 2px;
  background-color: var(--color-primary);
}

.section-title p {
  font-size: 28px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
  font-family: var(--font-heading);
  margin: 0;
}

@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }
  .section-title {
    margin-bottom: 35px;
  }
  .section-title p {
    font-size: 22px;
  }
}

/* 4. Hlavička & Navigace */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10000;
  padding: 18px 0;
  background-color: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  transition: all var(--transition);
}

.site-header.scrolled {
  position: fixed;
  background-color: var(--color-white);
  border-bottom: none;
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-belvela-font {
  font-family: var(--font-logo);
  font-size: 48px;
  line-height: 1;
  color: #52a5ff;
  text-shadow: 0 0 16px rgba(255, 255, 255, 0.45), 0 2px 10px rgba(0, 0, 0, 0.75);
  transition: transform var(--transition), color var(--transition), text-shadow var(--transition);
}

.site-header.scrolled .logo-belvela-font {
  color: var(--color-primary);
  text-shadow: none;
}

.logo:hover .logo-belvela-font {
  transform: scale(1.02);
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 30px;
}

.navmenu {
  display: flex;
}

.navmenu ul {
  display: flex;
  align-items: center;
  gap: 28px;
}

.navmenu a {
  font-family: var(--font-nav);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-white);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition);
}

.navmenu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition);
}

.navmenu a:hover,
.navmenu a.active {
  color: var(--color-primary);
}

.navmenu a:hover::after,
.navmenu a.active::after {
  width: 100%;
}

.site-header.scrolled .navmenu a {
  color: var(--color-heading);
}

.site-header.scrolled .navmenu a:hover,
.site-header.scrolled .navmenu a.active {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: rgba(255, 255, 255, 0.15);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-nav);
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition);
}

.site-header.scrolled .lang-switcher {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
}

.lang-switcher a {
  color: rgba(255, 255, 255, 0.75);
  padding: 3px 7px;
  border-radius: 3px;
  text-decoration: none;
  line-height: 1;
  transition: all var(--transition);
}

.site-header.scrolled .lang-switcher a {
  color: var(--color-text-muted);
}

.lang-switcher a:hover {
  color: var(--color-white);
}

.site-header.scrolled .lang-switcher a:hover {
  color: var(--color-primary);
}

.lang-switcher a.active {
  color: var(--color-white) !important;
  background: var(--color-primary);
}

.lang-switcher .lang-sep {
  color: rgba(255, 255, 255, 0.4);
  font-size: 11px;
}

.site-header.scrolled .lang-switcher .lang-sep {
  color: #bdc7d2;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 9px 24px;
  font-family: var(--font-nav);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-cta:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* Mobilní navigace */
.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-white);
  cursor: pointer;
  z-index: 10003;
}

.site-header.scrolled .mobile-nav-toggle {
  color: var(--color-heading);
}

.mobile-nav-toggle svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

@media (max-width: 1024px) {
  .mobile-nav-toggle {
    display: inline-flex;
  }

  .navmenu {
    position: fixed;
    top: 0;
    right: 0;
    width: min(280px, 86vw);
    height: 100vh;
    background-color: var(--color-white);
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
    padding: 80px 24px 30px;
    transform: translateX(100%);
    transition: transform 0.35s ease, visibility 0.35s ease;
    z-index: 10002;
    display: flex;
    flex-direction: column;
    visibility: hidden;
    pointer-events: none;
  }

  .navmenu.active {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }

  .navmenu ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    width: 100%;
  }

  .navmenu a {
    color: var(--color-heading) !important;
    font-size: 17px;
    display: block;
    width: 100%;
    padding: 8px 0;
  }

  .nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 9990;
  }

  .nav-backdrop.active {
    display: block;
  }

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

@media (max-width: 600px) {
  .logo-belvela-font {
    font-size: 38px;
  }
  .btn-cta {
    padding: 7px 16px;
    font-size: 13px;
  }
}

/* 5. Hero Carousel */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 850px;
  background-color: var(--color-bg-darker);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.carousel-slides {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.2s cubic-bezier(0.19, 1, 0.22, 1), visibility 1.2s cubic-bezier(0.19, 1, 0.22, 1);
}

.carousel-slide.active {
  opacity: 1;
  visibility: visible;
}

.carousel-slide img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  transition: transform 7s cubic-bezier(0.1, 0.8, 0.2, 1);
}

.carousel-slide.active img {
  transform: scale(1);
}

.carousel-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(35, 43, 53, 0.72) 0%, rgba(35, 43, 53, 0.82) 100%);
  z-index: 1;
}

.carousel-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  color: var(--color-white);
  padding: 160px 20px 80px;
}

.carousel-content h2 {
  font-size: 46px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 24px;
  line-height: 1.25;
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 1.6s cubic-bezier(0.16, 1, 0.3, 1), transform 1.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.carousel-content p {
  font-size: 19px;
  line-height: 1.6;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.9);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 1.6s cubic-bezier(0.16, 1, 0.3, 1) 0.35s, transform 1.6s cubic-bezier(0.16, 1, 0.3, 1) 0.35s;
  will-change: opacity, transform;
}

.btn-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 12px 36px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), transform var(--transition), opacity 1.5s cubic-bezier(0.16, 1, 0.3, 1) 0.65s;
  opacity: 0;
  transform: translateY(40px);
  will-change: opacity, transform;
}

.carousel-slide.active .carousel-content h2,
.carousel-slide.active .carousel-content p,
.carousel-slide.active .btn-hero {
  opacity: 1;
  transform: translateY(0);
}

.btn-hero:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Ovládací šipky a indikátory */
.carousel-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition), opacity var(--transition);
}

.carousel-nav-btn:hover {
  background: rgba(0, 102, 204, 0.85);
}

.carousel-nav-btn svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.carousel-nav-prev {
  left: 20px;
}

.carousel-nav-next {
  right: 20px;
}

.carousel-dots {
  position: absolute;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transition: background-color var(--transition), transform var(--transition);
  cursor: pointer;
}

.carousel-dot.active {
  background: var(--color-primary);
  transform: scale(1.2);
}

@media (max-width: 768px) {
  .hero {
    min-height: 640px;
  }
  .carousel-content {
    padding: 130px 16px 60px;
  }
  .carousel-content h2 {
    font-size: 30px;
  }
  .carousel-content p {
    font-size: 16px;
  }
  .carousel-nav-btn {
    display: none;
  }
}

/* Velké obrazovky (např. 27" iMac, 1440p a 4K) */
@media (min-width: 1400px) {
  .hero {
    min-height: 100vh;
    min-height: 920px;
  }
  .carousel-content {
    max-width: 960px;
    padding: 200px 20px 120px;
  }
  .carousel-content h2 {
    font-size: 52px;
  }
  .carousel-content p {
    font-size: 20px;
  }
}

@media (min-width: 1920px) {
  .hero {
    min-height: 100vh;
    min-height: 980px;
  }
  .carousel-content {
    max-width: 1020px;
  }
}

/* 6. Sekce O nás */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-intro {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  line-height: 1.55;
}

.feature-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  margin-top: 2px;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.about-right p {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 28px;
}

.btn-read-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 11px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 15px;
  transition: background-color var(--transition), transform var(--transition);
}

.btn-read-more svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  transition: transform var(--transition);
}

.btn-read-more:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-white);
}

.btn-read-more:hover svg {
  transform: translateX(4px);
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* 7. Pás s logy značek (Clients) */
.brands-strip {
  padding: 55px 0;
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 30px;
  align-items: center;
}

.brand-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  height: 105px;
}

.brand-card a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.brand-card img {
  max-height: 70px;
  max-width: 180px;
  width: auto;
  object-fit: contain;
  filter: grayscale(20%);
  opacity: 0.9;
  transition: filter var(--transition), opacity var(--transition), transform var(--transition);
}

.brand-card:hover img {
  filter: grayscale(0%);
  opacity: 1;
  transform: scale(1.08);
}

.brand-card--belvenila img {
  max-height: 92px;
  max-width: 220px;
}

@media (max-width: 992px) {
  .brands-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (max-width: 576px) {
  .brands-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 8px;
    justify-items: center;
  }

  .brand-card {
    width: 100%;
    height: 88px;
    padding: 6px;
  }

  .brand-card img {
    max-height: 52px;
    max-width: 100%;
  }

  .brand-card--belvenila img {
    max-height: 72px;
  }

  .brand-card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
  }
}

/* 8. Naše obory (Services) */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-header {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 16px;
}

.service-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  color: var(--color-primary);
}

.service-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.service-card h4 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-heading);
  margin-top: 6px;
}

.service-card p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: 24px;
  flex-grow: 1;
}

.service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.service-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-links a:hover {
  text-decoration: underline;
}

.services-callout {
  margin-top: 40px;
  text-align: center;
  padding: 20px;
  background-color: var(--color-bg-light);
  border-radius: var(--radius-md);
}

.services-callout p {
  font-size: 16px;
  color: var(--color-heading);
  font-weight: 500;
  margin-bottom: 6px;
}

.services-callout a {
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary);
}

.services-callout a:hover {
  text-decoration: underline;
}

@media (max-width: 992px) {
  .services-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* 9. Portfolio */
.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 35px;
}

.filter-btn {
  padding: 8px 22px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-heading);
  color: var(--color-heading);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.portfolio-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background-color: #f7f9fa;
  aspect-ratio: 4 / 3;
  transition: transform var(--transition), box-shadow var(--transition), opacity 0.4s ease;
}

.portfolio-item.hidden {
  display: none;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.portfolio-item:hover img {
  transform: scale(1.05);
}

.portfolio-overlay {
  position: absolute;
  inset: auto 12px 12px 12px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  z-index: 2;
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
  transform: translateY(0);
}

.portfolio-info h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.portfolio-info p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
}

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

.portfolio-action-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-bg-light);
  color: var(--color-heading);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition), color var(--transition);
}

.portfolio-action-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.portfolio-action-btn:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

@media (max-width: 992px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}

/* 10. Kontaktní sekce & formulář */
.contact-section {
  background-color: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.contact-container {
  max-width: 760px;
  margin: 0 auto;
}

.contact-intro {
  text-align: center;
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-heading);
  margin-bottom: 35px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Formulář */
.contact-form-wrap {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 44px 40px 36px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: #fbfcfd;
  font-family: inherit;
  font-size: 15px;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-white);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12);
}

.form-group select {
  cursor: pointer;
  appearance: auto;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group-math {
  background-color: var(--color-bg-light);
  border: 1px dashed #c9d5e3;
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}

.form-group-math label {
  color: var(--color-heading);
  margin-bottom: 10px;
}

.form-group-math strong {
  color: var(--color-primary);
  font-size: 16px;
  margin-left: 4px;
}

.math-input-wrap {
  max-width: 220px;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 13px 32px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), transform var(--transition);
  cursor: pointer;
  border: none;
  width: 100%;
}

.btn-submit svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  transition: transform var(--transition);
}

.btn-submit:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
}

.btn-submit:hover:not(:disabled) svg {
  transform: translateX(3px);
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-status {
  margin-top: 18px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  display: none;
  line-height: 1.5;
}

.form-status.success {
  display: block;
  background-color: #eafaf1;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-status.error {
  display: block;
  background-color: #fdf0ed;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.form-status.loading {
  display: block;
  background-color: #eef6fd;
  color: var(--color-primary);
  border: 1px solid #b8daff;
}

@media (max-width: 900px) {
  .contact-form-wrap {
    padding: 30px 24px 24px;
  }
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

/* 11. Lightbox Modal */
.lightbox-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(18, 24, 32, 0.9);
  backdrop-filter: blur(5px);
  z-index: 99999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.lightbox-modal.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.lightbox-caption {
  color: var(--color-white);
  font-size: 15px;
  margin-top: 14px;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: -45px;
  right: 0;
  color: var(--color-white);
  font-size: 32px;
  line-height: 1;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  transition: color var(--transition);
}

.lightbox-close:hover {
  color: var(--color-primary);
}

/* 11. Patička (Footer) */
.site-footer {
  background-color: var(--color-bg-dark);
  color: #cdd4dc;
  font-size: 14px;
  padding-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 50px;
}

.footer-about .logo-belvela-font {
  color: #4da3ff;
  font-size: 42px;
  display: inline-block;
  margin-bottom: 16px;
}

.footer-about p {
  color: #adb8c6;
  line-height: 1.6;
  margin-bottom: 6px;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: var(--color-primary);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #adb8c6;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-links a:hover {
  color: var(--color-white);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border-dark);
  padding: 24px 0;
  text-align: center;
  color: #8b97a6;
  font-size: 13px;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* 12. Scroll to top button */
.scroll-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-3px);
  color: var(--color-white);
}

.scroll-top svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* 13. Podstránky a právní dokumenty */
.subpage-banner {
  background-color: var(--color-bg-darker);
  padding: 130px 0 50px;
  color: var(--color-white);
  text-align: center;
  position: relative;
}

.subpage-banner h1 {
  color: var(--color-white);
  font-size: 38px;
  font-weight: 700;
  margin-bottom: 12px;
}

.breadcrumbs {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #adb8c6;
}

.breadcrumbs a {
  color: #adb8c6;
}

.breadcrumbs a:hover {
  color: var(--color-white);
}

.legal-section {
  padding: 60px 0 80px;
  background-color: var(--color-bg-light);
}

.legal-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--color-surface);
  padding: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  line-height: 1.8;
  font-size: 15px;
  color: var(--color-text);
}

.legal-container h2 {
  font-size: 22px;
  color: var(--color-heading);
  margin-top: 36px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.legal-container h2:first-of-type {
  margin-top: 10px;
}

.legal-container h3 {
  font-size: 18px;
  color: var(--color-heading);
  margin-top: 24px;
  margin-bottom: 10px;
}

.legal-container p {
  margin-bottom: 16px;
}

.legal-container ul,
.legal-container ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.legal-container ul {
  list-style: disc;
}

.legal-container ol {
  list-style: decimal;
}

.legal-container li {
  margin-bottom: 8px;
}

.legal-meta {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: right;
}

@media (max-width: 768px) {
  .subpage-banner {
    padding: 100px 0 40px;
  }
  .subpage-banner h1 {
    font-size: 28px;
  }
  .legal-container {
    padding: 24px 20px;
  }
}

/* 14. Scroll Reveal animace (Nativní GPU animace bez knihoven) */
.reveal {
  opacity: 0;
  transition: opacity 1.25s cubic-bezier(0.19, 1, 0.22, 1), transform 1.25s cubic-bezier(0.19, 1, 0.22, 1);
  will-change: opacity, transform;
}

.reveal-fade-up {
  transform: translateY(65px);
}

.reveal-fade-down {
  transform: translateY(-65px);
}

.reveal-fade-left {
  transform: translateX(-70px);
}

.reveal-fade-right {
  transform: translateX(70px);
}

.reveal-zoom {
  transform: scale(0.88);
}

.reveal.revealed {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* Kaskádové zpoždění (Stagger) */
.delay-1 {
  transition-delay: 0.15s;
}

.delay-2 {
  transition-delay: 0.3s;
}

.delay-3 {
  transition-delay: 0.45s;
}

.delay-4 {
  transition-delay: 0.6s;
}

/* Zohlednění přístupnosti (šetrný režim bez animací) */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* 15. Cookie Banner (GDPR compliant) */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  max-width: 460px;
  background: rgba(35, 43, 53, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 24px;
  color: #e2e8f0;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  z-index: 9000;
  transform: translateY(120%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.6s;
}

.cookie-banner.visible {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.cookie-banner-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cookie-banner-title svg {
  width: 20px;
  height: 20px;
  fill: #52a5ff;
}

.cookie-banner-text {
  font-size: 13px;
  line-height: 1.55;
  color: #cbd5e1;
  margin-bottom: 18px;
}

.cookie-banner-text a {
  color: #52a5ff;
  text-decoration: underline;
}

.cookie-banner-text a:hover {
  color: var(--color-white);
}

.cookie-banner-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-cookie-accept {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.btn-cookie-accept:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-cookie-necessary {
  background: rgba(255, 255, 255, 0.12);
  color: #e2e8f0;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition);
}

.btn-cookie-necessary:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

@media (max-width: 600px) {
  .cookie-banner {
    left: 16px;
    right: 16px;
    bottom: 16px;
    max-width: none;
    padding: 20px;
  }
  .cookie-banner-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cookie-banner-actions button {
    width: 100%;
    text-align: center;
  }
}