/* ============================================================
   THE ARCHITECTURAL LEDGER — Design System
   High-End Editorial CSS for berndkarlsboeck.com
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Surface hierarchy */
  --surface: #f9f9f9;
  --surface-container-lowest: #f5f5f5;
  --surface-container-low: #f2f2f2;
  --surface-container: #eeeeee;
  --surface-container-high: #e6e6e6;
  --surface-container-highest: #dddddd;
  --surface-black: #000000;

  /* Primary */
  --primary: #006972;
  --primary-container: #05b8c8;
  --accent-primary: #05b8c8;
  --on-primary: #ffffff;

  /* Secondary */
  --secondary: #036a73;

  /* Tertiary */
  --tertiary: #934b00;
  --tertiary-container: #fe8705;
  --accent-orange: #fb8500;
  --accent-green: #809f64;

  /* On-surface */
  --on-surface: #1a1a1a;
  --on-surface-variant: #3c494b;
  --on-surface-light: #5a6b6e;

  /* Outline */
  --outline-variant: #bbc9cb;

  /* Gradients */
  --gradient-cta: linear-gradient(135deg, var(--primary), var(--primary-container));
  --gradient-cta-hover: linear-gradient(180deg, var(--primary), var(--primary-container));
  --gradient-hero: radial-gradient(circle at 70% 30%, #05b8c8 0%, transparent 50%), radial-gradient(circle at 20% 80%, #fb8500 0%, transparent 50%);
  --hero-base: #ffffff;

  /* Shadows */
  --shadow-ambient: 0 20px 40px rgba(0, 31, 35, 0.06);
  --shadow-float: 0 12px 32px rgba(0, 31, 35, 0.10);

  /* Typography */
  --font-display: 'EB Garamond', 'Georgia', 'Noto Serif', serif;
  --font-body: 'Roboto', 'Inter', sans-serif;

  --display-lg: 3.5rem;
  --display-md: 2.75rem;
  --heading-lg: 2.25rem;
  --heading-md: 1.75rem;
  --heading-sm: 1.25rem;
  --body-lg: 1.125rem;
  --body-md: 1rem;
  --body-sm: 0.875rem;
  --label-sm: 0.75rem;

  /* Spacing scale (4px base) */
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --spacing-20: 80px;
  --spacing-24: 96px;
  --spacing-32: 128px;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 900px;

  /* Glass */
  --glass-bg: rgba(249, 249, 249, 0.72);
  --glass-bg-dark: rgba(0, 31, 35, 0.80);
  --glass-blur: 20px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--on-surface-variant);
  background-color: var(--surface);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-weight: 300;
  border-radius: 0; /* ZERO RADIUS — Architectural intent */
  border: none;
  outline: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--on-surface);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.display-lg {
  font-size: var(--display-lg);
  line-height: 1.1;
}

.display-md {
  font-size: var(--display-md);
  line-height: 1.15;
}

.heading-lg {
  font-size: var(--heading-lg);
}

.heading-md {
  font-size: var(--heading-md);
}

.heading-sm {
  font-size: var(--heading-sm);
  font-family: var(--font-body);
  font-weight: 300;
  letter-spacing: 0;
}

.body-lg {
  font-size: var(--body-lg);
}

.label-sm {
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  color: var(--on-surface-light);
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding: var(--spacing-24) 0;
}

.section--flush {
  padding: 0;
}

/* --- Glassmorphism Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: var(--spacing-4) 0;
  transition: background 0.3s ease;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  margin: 0 auto;
  max-width: 100%;
  padding: 0 var(--spacing-8);
}

.nav__logo img {
  display: block;
  height: 36px;
  width: auto;
}

.nav__logo-light {
  display: none;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  flex-shrink: 0;
}

.nav__lang-toggle {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--spacing-1);
  transition: color 0.2s ease;
}

.nav__lang-toggle:hover {
  color: var(--accent);
}

.nav__lang-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 400;
  letter-spacing: 0.08rem;
  text-transform: uppercase;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--body-sm);
  text-transform: uppercase;
  letter-spacing: 0.08rem;
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: 0; /* ZERO RADIUS */
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  line-height: 1.4;
}

.btn--primary {
  background: var(--accent-primary);
  color: var(--on-primary);
  border: none;
}

.btn--primary:hover {
  background: var(--secondary);
  color: var(--on-primary);
  box-shadow: var(--shadow-float);
}

.btn--secondary {
  background: var(--surface-container-highest);
  color: var(--on-surface);
  border: none;
}

.btn--secondary:hover {
  background: var(--surface-container-high);
}

.btn--ghost {
  background: transparent;
  color: var(--on-primary);
  outline: 1px solid rgba(255, 255, 255, 0.3);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  outline-color: rgba(255, 255, 255, 0.6);
  color: var(--on-primary);
}

.btn--sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--label-sm);
}

.btn--nav {
  padding: 0 var(--spacing-5);
  font-size: var(--label-sm);
  height: 36px;
  line-height: 36px;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn--outline {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn--outline:hover {
  background: var(--accent-primary);
  color: var(--on-primary);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 93vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--hero-base);
  color: var(--on-surface);
  padding-top: var(--spacing-20);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: var(--max-width);
  margin: auto;
  padding: 0 var(--spacing-6);
  width: 100%;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--display-lg);
  font-weight: 400;
  color: var(--on-surface);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 1100px;
  margin-bottom: var(--spacing-8);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--body-lg);
  color: var(--on-surface-variant);
  max-width: 680px;
  line-height: 1.8;
}

/* --- CKG Hero variant (background image + gradient overlay blend) --- */
.hero--ckg {
  background:
    linear-gradient(to bottom, rgba(255,255,255,0.95) 10%, rgba(255,255,255,0) 45%),
    linear-gradient(rgba(255,255,255,0.85), rgba(255,255,255,0.85)),
    url('../images/Discoverpage2.jpg') center / cover no-repeat;
  background-size: 100% 100%, 100% 100%, cover;
}

.hero--ckg::before {
  background: transparent;
  opacity: 0;
}

.hero--ckg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

/* --- Client Logos Marquee --- */
.logo-marquee {
  width: 100%;
  overflow: hidden;
  padding: var(--spacing-10) 0 var(--spacing-6);
  background: transparent;
}

.logo-marquee__track {
  display: flex;
  gap: var(--spacing-12);
  width: max-content;
  will-change: transform;
}

.logo-marquee__item {
  flex-shrink: 0;
  height: 28px;
  width: auto;
  object-fit: contain;
  opacity: 0.35;
  filter: grayscale(100%);
  padding: 0 var(--spacing-6);
}

/* --- Services Section --- */
.services {
  background: #fff;
  padding-top: calc(var(--spacing-12) * 2);
  padding-bottom: 0;
}

.services__header {
  margin-bottom: var(--spacing-12);
  text-align: center;
}

.service-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 0;
}

.service-item__media {
  position: relative;
  overflow: hidden;
  background: var(--surface-container);
  aspect-ratio: 16 / 9;
}

.service-item__media--vignette::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(238, 238, 238, 0.7) 100%);
  pointer-events: none;
  z-index: 1;
}

.service-item__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.service-item__media video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: absolute;
  top: 0;
  left: 0;
}

.service-item__media iframe {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.service-item__media--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-container-high);
}

.service-item__media--placeholder::after {
  content: '';
  width: 64px;
  height: 64px;
  border: 2px solid var(--outline-variant);
  opacity: 0.3;
  z-index: 2;
}

.service-item__body {
  padding: var(--spacing-12) var(--spacing-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.service-item:nth-child(odd) .service-item__body {
  background: var(--surface-container-low);
  padding-right: max(var(--spacing-6), calc((100vw - var(--max-width)) / 2 + var(--spacing-6)));
}

.service-item:nth-child(even) .service-item__body {
  background: var(--surface-container-low);
  padding-right: max(var(--spacing-6), calc((100vw - var(--max-width)) / 2 + var(--spacing-6)));
}

.service-item__number {
  font-family: var(--font-display);
  font-size: var(--display-md);
  color: var(--outline-variant);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: var(--spacing-4);
}

.service-item__title {
  font-family: var(--font-display);
  font-size: var(--heading-lg);
  color: var(--on-surface);
  margin-bottom: var(--spacing-6);
}

.service-item__text {
  font-size: var(--body-md);
  line-height: 1.8;
  margin-bottom: var(--spacing-6);
  color: var(--on-surface-variant);
}

.service-item__annotation {
  padding-top: 0;
}

.service-item__annotation-text {
  font-size: var(--body-sm);
  color: var(--on-surface-light);
  line-height: 1.6;
}

.service-item__annotation-text a {
  color: var(--primary);
  font-weight: 400;
}

.service-item__cta-btn {
  position: absolute;
  z-index: 1;
  bottom: var(--spacing-6);
  right: var(--spacing-6);
}

/* --- Services Carousel --- */
.services__carousel {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;          /* Firefox */
}

.services__carousel::-webkit-scrollbar {
  display: none;                  /* Chrome / Safari / Edge */
}

.services__track {
  display: flex;
}

.services__track .service-item {
  flex: 0 0 100%;
  width: 100%;
  min-width: 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.services__nav {
  display: flex;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.services__dot {
  flex: 1;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-3) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.services__dot::before {
  content: '';
  display: block;
  height: 2px;
  background: var(--outline-variant);
  transition: background 0.3s ease;
}

.services__dot.is-active::before {
  background: var(--accent-orange);
}

.services__dot span {
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.08rem;
  color: var(--on-surface-light);
  transition: color 0.3s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.services__dot.is-active span {
  color: var(--on-surface);
}

/* Learn carousel fills its media container — continuous horizontal marquee */
.service-item__media .learn-carousel {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  overflow: hidden;
}

.service-item__media .learn-carousel .learn-carousel__track {
  display: flex;
  height: 100%;
  will-change: transform;
}

.service-item__media .learn-carousel .learn-carousel__slide {
  flex-shrink: 0;
  height: 100%;
}

/* fill-w: image covers the full container width */
.service-item__media .learn-carousel .learn-carousel__slide--fill-w img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* fill-h: image fills the full height, natural width (no crop) */
.service-item__media .learn-carousel .learn-carousel__slide--fill-h img {
  height: 100%;
  width: auto;
  display: block;
}

/* --- About & Testimonials --- */
.about {
  background: #fff;
  padding-top: calc(var(--spacing-12) * 2);
  padding-bottom: 0;
}

.about__header {
  margin-bottom: var(--spacing-12);
  text-align: center;
}

.about__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.about__media {
  position: relative;
  overflow: hidden;
  background: var(--surface-container);
  aspect-ratio: 16 / 9;
}

.about__media img:not(.about__award-logos) {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about__award-logos {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 3%;
  width: auto;
  height: 90%;
  object-fit: contain;
  pointer-events: none;
  z-index: 1;
}

.about__media--placeholder {
  background: var(--surface-black);
}

.about__carousel {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.about__carousel::-webkit-scrollbar {
  display: none;
}

.about__track {
  display: flex;
  height: 100%;
}

.about__track > .about-item__body {
  flex: 0 0 100%;
  width: 100%;
  min-width: 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.about-item__body {
  padding: var(--spacing-12) var(--spacing-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--surface-container-low);
  padding-right: max(var(--spacing-6), calc((100vw - var(--max-width)) / 2 + var(--spacing-6)));
}

.about-item__title {
  font-family: var(--font-display);
  font-size: var(--heading-lg);
  color: var(--on-surface);
  margin-bottom: var(--spacing-6);
}

.about-item__text {
  font-size: var(--body-md);
  line-height: 1.8;
  color: var(--on-surface-variant);
}

.about-item__quote {
  margin: 0;
}

.about-item__quote-mark {
  display: block;
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 1;
  color: var(--primary-container);
  margin-bottom: var(--spacing-2);
}

.about-item__quote-text {
  font-family: var(--font-display);
  font-size: var(--heading-md);
  font-style: italic;
  line-height: 1.5;
  color: var(--on-surface);
  margin-bottom: var(--spacing-8);
}

.about-item__author {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--body-sm);
  color: var(--on-surface-light);
  text-transform: uppercase;
  letter-spacing: 0.08rem;
}

.about__nav {
  display: flex;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.about__dot {
  flex: 1;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-3) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.about__dot::before {
  content: '';
  display: block;
  height: 2px;
  background: var(--outline-variant);
  transition: background 0.3s ease;
}

.about__dot.is-active::before {
  background: var(--accent-orange);
}

.about__dot span {
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.08rem;
  color: var(--on-surface-light);
  transition: color 0.3s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.about__dot.is-active span {
  color: var(--on-surface);
}

/* --- Collaborate / Contact --- */
.collaborate {
  background: #fff;
  padding-top: calc(var(--spacing-12) * 2);
  padding-bottom: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.collaborate__header {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.collaborate__grid {
  position: relative;
  background: var(--hero-base);
  overflow: hidden;
  padding: var(--spacing-16) 0;
  flex: 1;
  display: flex;
  align-items: center;
}

.collaborate__grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--surface-container-low);
  pointer-events: none;
  z-index: 0;
}

.collaborate__grid-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  align-items: start;
  position: relative;
  z-index: 1;
}

.collaborate__text {
  font-family: var(--font-display);
  font-size: var(--heading-md);
  color: var(--on-surface);
  line-height: 1.4;
  margin-bottom: var(--spacing-8);
}

.collaborate__actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-10);
}

.collaborate__actions .btn--outline {
  width: fit-content;
}

.collaborate__cta-hint {
  font-size: var(--body-sm);
  color: var(--on-surface-light);
}

/* --- Form Styles --- */
.form-group {
  margin-bottom: var(--spacing-6);
}

.form-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  color: var(--on-surface-light);
  margin-bottom: var(--spacing-2);
}

.form-input,
.form-textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--outline-variant);
  padding: var(--spacing-3) 0;
  font-size: var(--body-md);
  color: var(--on-surface);
  font-weight: 300;
  transition: border-color 0.2s ease;
}

.form-input:focus,
.form-textarea:focus {
  border-bottom: 2px solid var(--primary);
  padding-bottom: calc(var(--spacing-3) - 1px);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--outline-variant);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-body);
}

.form-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-6);
}

.form-send-link {
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  color: var(--accent-primary);
  cursor: pointer;
  padding: 0;
  white-space: nowrap;
  text-decoration: none;
}

.form-send-link:hover {
  opacity: 0.75;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  margin-bottom: 0;
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--outline-variant);
  background: transparent;
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
  position: relative;
}

.form-checkbox input[type="checkbox"]:checked {
  background: var(--primary);
  border-color: var(--primary);
}

.form-checkbox input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 5px;
  width: 5px;
  height: 9px;
  border: solid var(--on-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.form-checkbox label {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  line-height: 1.5;
  cursor: pointer;
}

.form-checkbox label a {
  color: var(--primary);
}

.form-success,
.form-error {
  padding: var(--spacing-4) var(--spacing-6);
  margin-top: var(--spacing-4);
  font-size: var(--body-sm);
  display: none;
}

.form-success {
  background: var(--accent-green);
  color: var(--on-primary);
}

.form-error {
  background: var(--tertiary-container);
  color: var(--on-primary);
}

/* --- CKG Page Styles --- */
.ckg-hero {
  background: var(--gradient-hero);
  color: var(--on-primary);
  padding: var(--spacing-32) 0 var(--spacing-16);
  text-align: left;
}

.ckg-hero__title {
  font-family: var(--font-display);
  font-size: var(--display-md);
  color: var(--on-primary);
  max-width: 800px;
  margin-bottom: var(--spacing-6);
}

.ckg-hero__title .highlight {
  color: var(--primary-container);
}

.ckg-hero__subtitle {
  font-size: var(--body-lg);
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: var(--spacing-8);
}

.ckg-how-it-works {
  background: #fff;
  padding: 0;
}

.ckg-how__header {
  padding-top: calc(var(--spacing-12) * 2);
  margin-bottom: var(--spacing-12);
  text-align: center;
}

.ckg-steps-wrapper {
  background: var(--surface-container-low);
  padding-top: var(--spacing-10);
  padding-bottom: calc(var(--spacing-12) * 2);
}

.ckg-steps-cta {
  padding-top: var(--spacing-10);
  text-align: center;
}

.ckg-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0;
}

.ckg-step {
  padding: var(--spacing-8);
}

.ckg-step__number {
  font-family: var(--font-display);
  font-size: var(--display-md);
  color: var(--outline-variant);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: var(--spacing-3);
}

.ckg-step__title {
  font-family: var(--font-body);
  font-size: var(--heading-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.05rem;
  color: var(--on-surface);
  margin-bottom: var(--spacing-4);
}

.ckg-step__text {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  line-height: 1.7;
}

/* CKG Form Sections */
.ckg-form-section {
  padding: var(--spacing-20) 0;
  position: relative;
}

.ckg-form-section:nth-child(odd) {
  background: var(--surface);
}

.ckg-form-section:nth-child(even) {
  background: var(--surface-container-low);
}

.ckg-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: start;
}

.ckg-form-info {
  padding: var(--spacing-4);
}

.ckg-form-info > .label-sm {
  display: block;
  margin-bottom: var(--spacing-4);
}

.ckg-step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.ckg-form-info__step {
  display: block;
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  color: var(--accent-primary);
  margin-bottom: 0;
}

.ckg-form__continue {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  color: var(--accent-primary);
  text-decoration: none;
}

.ckg-form__continue:hover {
  opacity: 0.75;
}

.ckg-form-info__title {
  font-family: var(--font-display);
  font-size: var(--heading-md);
  color: var(--on-surface);
  margin-bottom: var(--spacing-6);
}

.ckg-form-info__examples {
  font-size: var(--body-sm);
  color: var(--on-surface-light);
  line-height: 1.8;
  white-space: pre-line;
  margin: 0;
}

.ckg-form-fields {
  padding: var(--spacing-4);
}

.ckg-form-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--outline-variant);
  padding: var(--spacing-3) 0;
  font-size: var(--body-md);
  color: var(--on-surface);
  font-weight: 300;
  transition: border-color 0.2s ease;
  margin-bottom: var(--spacing-4);
}

.ckg-form-input:focus {
  border-bottom: 2px solid var(--primary);
  padding-bottom: calc(var(--spacing-3) - 1px);
}

.ckg-form-input::placeholder {
  color: var(--outline-variant);
}

.ckg-progress {
  display: flex;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-8);
}

.ckg-progress__bar {
  flex: 1;
  height: 4px;
  background: var(--surface-container-high);
}

.ckg-progress__bar.is-active {
  background: var(--accent-orange);
}

.ckg-progress__bar.is-done {
  background: var(--accent-primary);
}

/* --- CKG Form Carousel --- */
.ckg-form {
  background: #fff;
}

.ckg-form__header {
  padding-top: calc(var(--spacing-12) * 2);
  padding-bottom: 0;
  margin-bottom: var(--spacing-12);
  text-align: center;
}

.ckg-form__nav {
  display: flex;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.ckg-form__dot {
  flex: 1;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-3) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.ckg-form__dot::before {
  content: '';
  display: block;
  height: 2px;
  background: var(--outline-variant);
  transition: background 0.3s ease;
}

.ckg-form__dot.is-active::before {
  background: var(--accent-orange);
}

.ckg-form__dot.is-done::before {
  background: var(--accent-primary);
}

.ckg-form__dot span {
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.08rem;
  color: var(--on-surface-light);
  transition: color 0.3s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ckg-form__dot.is-active span {
  color: var(--on-surface);
}

.ckg-form__carousel {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  background: var(--surface-container-low);
}

.ckg-form__carousel::-webkit-scrollbar {
  display: none;
}

.ckg-form__track {
  display: flex;
}

.ckg-form__slide {
  flex: 0 0 100%;
  width: 100%;
  min-width: 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  padding: var(--spacing-20) 0;
}

.ckg-submit-section {
  background: var(--surface-container-low);
  padding: var(--spacing-16) 0;
  text-align: center;
}

.ckg-submit-inner {
  margin: var(--spacing-8) auto;
  max-width: 400px;
}

.ckg-submit-section .form-checkbox,
.ckg-submit-inner .form-checkbox {
  justify-content: center;
  margin-bottom: var(--spacing-8);
}

.ckg-validation-errors {
  max-width: 500px;
  margin: var(--spacing-4) auto 0;
  text-align: left;
  display: none;
}

.ckg-validation-errors ul {
  list-style: disc;
  padding-left: var(--spacing-6);
}

.ckg-validation-errors li {
  font-size: var(--body-sm);
  color: var(--tertiary);
  margin-bottom: var(--spacing-2);
}

.ckg-success {
  position: relative;
  background: var(--hero-base);
  color: var(--on-surface);
  padding: var(--spacing-32) 0;
  text-align: center;
  display: none;
  overflow: hidden;
}

.ckg-success::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

.ckg-success > * {
  position: relative;
  z-index: 1;
}

.ckg-success__title {
  font-family: var(--font-display);
  font-size: var(--display-lg);
  font-weight: 400;
  color: var(--on-surface);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-8);
}

.ckg-success__text {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--body-lg);
  color: var(--on-surface-variant);
  line-height: 1.8;
}

.ckg-error-popup {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
}

.ckg-error-popup.is-visible {
  display: flex;
}

.ckg-error-popup__card {
  background: var(--surface-container-lowest);
  padding: var(--spacing-10);
  max-width: 500px;
  width: 90%;
  box-shadow: var(--shadow-float);
}

.ckg-error-popup__title {
  font-family: var(--font-display);
  font-size: var(--heading-sm);
  color: var(--tertiary);
  margin-bottom: var(--spacing-4);
}

.ckg-error-popup__text {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  margin-bottom: var(--spacing-6);
}

/* --- Nav Dark Mode (for dark hero pages like CKG) --- */
.nav--dark {
  background: transparent;
}

.nav--dark .nav__logo-dark {
  display: none;
}

.nav--dark .nav__logo-light {
  display: block;
}

.nav--dark .nav__link {
  color: rgba(255, 255, 255, 0.7);
}

.nav--dark .nav__link:hover {
  color: var(--on-primary);
}

.nav--dark .nav__lang-toggle {
  color: rgba(255, 255, 255, 0.7);
}

.nav--dark .nav__lang-toggle:hover {
  color: var(--on-primary);
}

.nav--dark .nav__lang-label {
  color: inherit;
}

/* --- Nav Link --- */
.nav__link {
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.08rem;
  color: var(--on-surface-light);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav__link:hover {
  color: var(--on-surface);
}

/* --- Footer --- */
.footer {
  background: var(--surface-black);
  color: rgba(255, 255, 255, 0.5);
  padding: var(--spacing-10) 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__text {
  font-size: var(--body-sm);
  color: rgba(255, 255, 255, 0.5);
}

.footer__links {
  display: flex;
  gap: var(--spacing-4);
}

.footer__links a {
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.footer__links a:hover {
  opacity: 1;
}

/* --- 404 Page --- */
.page-404 {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--hero-base);
  color: var(--on-surface);
  text-align: center;
  padding: var(--spacing-6);
  overflow: hidden;
}

.page-404::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

.page-404 > * {
  position: relative;
  z-index: 1;
}

.page-404__code {
  font-family: var(--font-display);
  font-size: 8rem;
  line-height: 1;
  color: var(--on-surface);
  opacity: 0.15;
  margin-bottom: var(--spacing-4);
}

.page-404__title {
  font-family: var(--font-display);
  font-size: var(--display-lg);
  font-weight: 400;
  color: var(--on-surface);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-8);
}

.page-404__text {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--body-lg);
  color: var(--on-surface-variant);
  line-height: 1.8;
  margin-bottom: var(--spacing-8);
}

/* --- Scroll Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  .nav__inner {
    padding: 0 var(--spacing-6);
  }

  .hero__title {
    font-size: var(--display-md);
  }

  .logo-marquee__track {
    gap: var(--spacing-6);
  }

  .logo-marquee__item {
    padding: 0 var(--spacing-4);
  }

  .service-item {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    gap: 0;
  }

  .service-item__media {
    aspect-ratio: 16 / 9;
    position: relative;
    order: -1; /* always show image/video before text in single-column */
  }

  .service-item:nth-child(odd) .service-item__body,
  .service-item:nth-child(even) .service-item__body {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }

  .service-item__body {
    justify-content: flex-start;
  }

  .services__dot span {
    display: none;
  }

  .about__layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }

  .about__media {
    aspect-ratio: 16 / 9;
    order: -1;
  }

  .about-item__body {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
    justify-content: flex-start;
  }

  .about__dot span {
    display: none;
  }

  .collaborate__grid {
    padding: var(--spacing-12) 0;
  }

  .collaborate__grid-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-10);
    text-align: center;
  }

  .collaborate__form {
    display: none;
  }

  .collaborate__actions {
    align-items: center;
  }

  .collaborate__actions .btn--outline {
    width: 100%;
    max-width: 360px;
  }

  .ckg-steps {
    grid-template-columns: 1fr;
  }

  .ckg-step:not(:last-child) {
    border-bottom: 1px solid var(--outline-variant);
  }

  .ckg-how__header {
    padding-top: calc(var(--spacing-16) * 2);
    margin-bottom: var(--spacing-16);
  }

  .ckg-form__header {
    padding-top: calc(var(--spacing-16) * 2);
    margin-bottom: var(--spacing-16);
  }

  .ckg-form__slide {
    padding: var(--spacing-12) 0;
  }

  .ckg-form-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
}

@media (max-width: 768px) {
  :root {
    --display-lg: 2.5rem;
    --display-md: 2rem;
    --heading-lg: 1.75rem;
    --heading-md: 1.5rem;
  }

  .section {
    padding: var(--spacing-16) 0;
  }

  .btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .btn--nav {
    min-height: 36px;
    height: 36px;
  }

  .hero {
    padding-top: var(--spacing-24);
  }

  .services {
    padding-top: calc(var(--spacing-16) * 2);
    padding-bottom: 0;
  }

  .services__header {
    margin-bottom: var(--spacing-16);
  }

  .service-item {
    margin-bottom: 0;
  }

  .service-item__body {
    overflow: auto;
  }

  .service-item__body {
    padding: var(--spacing-8) var(--spacing-6);
  }

  .logo-marquee__track {
    gap: var(--spacing-4);
  }

  .logo-marquee__item {
    padding: 0 var(--spacing-3);
  }

  .about {
    padding-top: calc(var(--spacing-16) * 2);
    padding-bottom: 0;
  }

  .about__header {
    margin-bottom: var(--spacing-16);
  }

  .about-item__body {
    overflow: auto;
    padding: var(--spacing-8) var(--spacing-6);
  }

  .about-item__quote-text {
    font-size: var(--heading-sm);
  }

  .about-item__quote-mark {
    font-size: 2.5rem;
  }

  .collaborate__grid-inner {
    gap: var(--spacing-8);
  }

  .collaborate__text {
    font-size: var(--heading-sm);
  }

  .form-textarea {
    min-height: 96px;
  }

  .page-404__code {
    font-size: 5rem;
  }

  .ckg-hero {
    padding-top: var(--spacing-20);
  }

  .ckg-form-grid {
    gap: var(--spacing-4);
  }

  .ckg-how__header {
    padding-top: calc(var(--spacing-12) * 2);
    margin-bottom: var(--spacing-16);
  }

  .ckg-form__header {
    padding-top: calc(var(--spacing-12) * 2);
    margin-bottom: var(--spacing-16);
  }

  .ckg-form__slide {
    padding: var(--spacing-8) 0;
  }

}

@media (max-width: 480px) {
  :root {
    --display-lg: 2rem;
    --display-md: 1.75rem;
    --heading-lg: 1.5rem;
  }

  .container {
    padding: 0 var(--spacing-4);
  }

  .nav__inner {
    padding: 0 var(--spacing-4);
  }

  .section {
    padding: var(--spacing-12) 0;
  }

  .hero__title,
  .hero__subtitle {
    word-break: break-word;
  }

  .services {
    padding-top: calc(var(--spacing-12) * 2);
    padding-bottom: 0;
  }

  .services__header {
    margin-bottom: var(--spacing-6);
  }

  .services__nav {
    gap: var(--spacing-3);
  }

  .about {
    padding-top: calc(var(--spacing-12) * 2);
    padding-bottom: 0;
  }

  .about__header {
    margin-bottom: var(--spacing-6);
  }

  .about__nav {
    gap: var(--spacing-3);
  }

  .page-404__code {
    font-size: 3.5rem;
  }

  .ckg-form__nav {
    gap: var(--spacing-3);
  }

  .ckg-form__dot span {
    font-size: 0.6rem;
  }

  .ckg-how__header {
    padding-top: calc(var(--spacing-12) * 2);
    margin-bottom: var(--spacing-6);
  }

  .ckg-form__header {
    padding-top: calc(var(--spacing-12) * 2);
    margin-bottom: var(--spacing-6);
  }

  .ckg-form__slide {
    padding: var(--spacing-6) 0;
  }
}