/* ==========================================================================
   Choicecabinstorypuls — Berlin Raumwerk Stylesheet
   Aesthetic: Swiss Minimalist (Strict grid, oversized typography, stark B/W, technical layouts)
   Card Style: Border Accent (Accent structural bars, precise architectural annotations)
   ========================================================================== */

:root {
  --color-black: #0c0d0e;
  --color-stone-900: #181a1b;
  --color-stone-700: #34373a;
  --color-stone-500: #62676c;
  --color-stone-300: #a4a9ad;
  --color-stone-100: #ebeff1;
  --color-stone-50: #f6f8f9;
  --color-white: #ffffff;
  --color-accent: #0c0d0e;
  --color-accent-subtle: #d3d7da;

  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Menlo", "Consolas", "Liberation Mono", monospace;

  --space-4: 4px;
  --space-8: 8px;
  --space-16: 16px;
  --space-24: 24px;
  --space-40: 40px;
  --space-64: 64px;

  --header-height-desktop: 60px;
  --header-height-mobile: 50px;
}

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

html {
  font-size: 16px;
  line-height: 1.5;
  background-color: var(--color-stone-50);
  color: var(--color-black);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-stone-50);
  color: var(--color-black);
}

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

a {
  color: var(--color-black);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover {
  text-decoration-thickness: 2px;
}

h1, h2, h3, h4, h5, h6, .brand-name, .nav-item {
  overflow-wrap: anywhere;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

/* Accessibility Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-black);
  outline-offset: 3px;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-24);
  padding-right: var(--space-24);
}

.grid {
  display: grid;
  gap: var(--space-40);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flex {
  display: flex;
}

.min-w-0 {
  min-width: 0;
}

/* Header */
.site-header {
  height: var(--header-height-desktop);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-stone-300);
  position: relative;
  z-index: 100;
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  text-decoration: none;
  color: var(--color-black);
}

.brand-mark {
  width: 28px;
  height: 28px;
  display: block;
}

.brand-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-black);
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--color-stone-500);
  margin-left: var(--space-4);
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-24);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-stone-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-4) 0;
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-black);
  border-bottom: 2px solid var(--color-black);
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-black);
  color: var(--color-white);
  padding: var(--space-8) var(--space-16);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid var(--color-black);
  cursor: pointer;
}

.header-cta-btn:hover {
  background-color: var(--color-stone-700);
  border-color: var(--color-stone-700);
  color: var(--color-white);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-8);
  align-items: center;
  justify-content: center;
}

.menu-toggle-icon {
  width: 24px;
  height: 24px;
  stroke: var(--color-black);
}

/* Card Style: Border Accent (Swiss technical) */
.accent-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-stone-300);
  border-left: 6px solid var(--color-black);
  padding: var(--space-24);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.accent-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(12, 13, 14, 0.06);
}

.card-spec-strip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-stone-500);
  border-bottom: 1px solid var(--color-stone-100);
  padding-bottom: var(--space-8);
  margin-bottom: var(--space-24);
  display: flex;
  justify-content: space-between;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-16);
}

.card-excerpt {
  color: var(--color-stone-700);
  font-size: 0.9375rem;
  margin-bottom: var(--space-24);
  line-height: 1.6;
}

.card-cta-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  color: var(--color-black);
  text-decoration: none;
  margin-top: auto;
}

.card-cta-link::after {
  content: "→";
  transition: transform 0.15s ease;
}

.card-cta-link:hover::after {
  transform: translateX(4px);
}

/* Sections */
.section {
  padding-top: var(--space-64);
  padding-bottom: var(--space-64);
}

.hero-section {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-stone-300);
  padding-top: var(--space-64);
  padding-bottom: var(--space-64);
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-stone-500);
  margin-bottom: var(--space-16);
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  max-width: 950px;
  margin-bottom: var(--space-24);
}

.hero-lead {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--color-stone-700);
  max-width: 760px;
  line-height: 1.6;
  margin-bottom: var(--space-40);
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-24);
  border-top: 1px solid var(--color-stone-300);
  padding-top: var(--space-24);
  margin-top: var(--space-40);
}

.stat-item {
  min-width: 0;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-black);
  line-height: 1;
  margin-bottom: 12px;
}

.stat-label {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-stone-500);
}

/* Sub-page Article Layout */
.article-header {
  border-bottom: 1px solid var(--color-stone-300);
  background-color: var(--color-white);
  padding-top: var(--space-64);
  padding-bottom: var(--space-40);
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-stone-500);
  margin-bottom: var(--space-16);
}

.article-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.1;
  margin-bottom: var(--space-24);
}

.article-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-16);
  border-top: 1px solid var(--color-stone-100);
  padding-top: var(--space-16);
  margin-top: var(--space-24);
}

.article-meta-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-stone-500);
}

.article-meta-item strong {
  display: block;
  font-size: 0.875rem;
  color: var(--color-black);
  margin-top: var(--space-4);
}

.article-body {
  padding-top: var(--space-64);
  padding-bottom: var(--space-64);
}

.article-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-64);
}

.article-aside {
  position: sticky;
  top: var(--space-24);
  height: fit-content;
  border-left: 1px solid var(--color-stone-300);
  padding-left: var(--space-24);
}

.aside-title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-16);
}

.aside-nav {
  list-style: none;
}

.aside-nav li {
  margin-bottom: var(--space-8);
}

.aside-nav a {
  font-size: 0.8125rem;
  color: var(--color-stone-700);
  text-decoration: none;
}

.aside-nav a:hover {
  color: var(--color-black);
  text-decoration: underline;
}

.prose {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-stone-700);
}

.prose h2 {
  color: var(--color-black);
  font-size: 1.75rem;
  margin-top: var(--space-40);
  margin-bottom: var(--space-16);
}

.prose h3 {
  color: var(--color-black);
  font-size: 1.25rem;
  margin-top: var(--space-24);
  margin-bottom: var(--space-16);
}

.prose p {
  margin-bottom: var(--space-24);
}

.prose ul, .prose ol {
  margin-bottom: var(--space-24);
  padding-left: var(--space-24);
}

.prose li {
  margin-bottom: var(--space-8);
}

.prose blockquote {
  border-left: 4px solid var(--color-black);
  padding-left: var(--space-24);
  margin: var(--space-40) 0;
  font-style: italic;
  color: var(--color-black);
  font-size: 1.125rem;
}

/* Technical Specification Table */
.spec-table-wrapper {
  overflow-x: auto;
  margin: var(--space-40) 0;
  border: 1px solid var(--color-stone-300);
  background-color: var(--color-white);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.spec-table th,
.spec-table td {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-stone-100);
}

.spec-table th {
  background-color: var(--color-stone-50);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-stone-700);
  border-bottom: 2px solid var(--color-stone-300);
}

.spec-table tr:last-child td {
  border-bottom: none;
}

/* Comparison Box */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
  margin: var(--space-40) 0;
}

.comp-column {
  background-color: var(--color-white);
  border: 1px solid var(--color-stone-300);
  border-top: 4px solid var(--color-black);
  padding: var(--space-24);
}

.comp-column h4 {
  font-size: 1.125rem;
  margin-bottom: var(--space-16);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-24);
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-8);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px var(--space-16);
  border: 1px solid var(--color-stone-300);
  background-color: var(--color-white);
  color: var(--color-black);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  border-radius: 0;
}

.form-input.is-invalid,
.form-textarea.is-invalid {
  border-color: #c92a2a;
}

.form-error {
  color: #c92a2a;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  margin-top: var(--space-4);
  display: none;
}

.form-error.is-visible {
  display: block;
}

.form-submit-btn {
  background-color: var(--color-black);
  color: var(--color-white);
  border: none;
  padding: var(--space-16) var(--space-40);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.form-submit-btn:hover {
  background-color: var(--color-stone-700);
  color: var(--color-white);
}

/* Static Map Block */
.map-canvas-block {
  background-color: #121416;
  color: var(--color-white);
  padding: var(--space-40);
  position: relative;
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--color-stone-700);
}

.map-technical-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.map-coords {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-stone-300);
  letter-spacing: 0.1em;
  z-index: 1;
}

.map-pin {
  z-index: 1;
  background: var(--color-white);
  color: var(--color-black);
  padding: var(--space-16);
  max-width: 280px;
  border-left: 4px solid var(--color-black);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-stone-300);
  padding-top: var(--space-64);
  padding-bottom: var(--space-40);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-40);
  margin-bottom: var(--space-40);
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-16);
  color: var(--color-stone-500);
}

.footer-nav {
  list-style: none;
}

.footer-nav li {
  margin-bottom: var(--space-8);
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--color-stone-700);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color-black);
  text-decoration: underline;
}

.footer-company-info {
  font-size: 0.8125rem;
  color: var(--color-stone-700);
  line-height: 1.6;
}

.footer-company-info p {
  margin-bottom: var(--space-8);
}

.footer-bottom {
  border-top: 1px solid var(--color-stone-100);
  padding-top: var(--space-24);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-16);
  font-size: 0.75rem;
  color: var(--color-stone-500);
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-black);
  color: var(--color-white);
  border-top: 2px solid var(--color-stone-700);
  padding: var(--space-24);
  z-index: 999;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
}

.cookie-banner[hidden] {
  display: none !important;
}

.cookie-banner-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-24);
}

.cookie-content {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-stone-100);
}

.cookie-content a {
  color: var(--color-white);
}

.cookie-actions {
  display: flex;
  flex-shrink: 0;
  gap: var(--space-8);
}

.cookie-btn {
  padding: var(--space-8) var(--space-16);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  border: 1px solid var(--color-white);
  background-color: transparent;
  color: var(--color-white);
}

.cookie-btn-primary {
  background-color: var(--color-white);
  color: var(--color-black);
}

.cookie-btn:hover {
  background-color: var(--color-stone-300);
  color: var(--color-black);
}

.cookie-btn-primary:hover {
  background-color: var(--color-stone-100);
}

/* Responsive Navigation & Breakpoints */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
  .article-aside {
    position: static;
    border-left: none;
    border-top: 1px solid var(--color-stone-300);
    padding-left: 0;
    padding-top: var(--space-24);
  }
}

@media (max-width: 767px) {
  .site-header {
    height: var(--header-height-mobile);
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height-mobile);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 2px solid var(--color-black);
    flex-direction: column;
    padding: var(--space-24);
    align-items: flex-start;
    gap: var(--space-16);
    z-index: 1000;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  }

  .main-nav.is-open {
    display: flex;
  }

  .header-cta-btn {
    display: none;
  }

  .grid-cols-2,
  .grid-cols-3,
  .hero-stats-row,
  .comparison-grid {
    grid-template-columns: 1fr;
  }

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

  .cookie-banner-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .cookie-actions {
    width: 100%;
    flex-direction: column;
  }

  .cookie-btn {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 399px) {
  .container {
    padding-left: var(--space-16);
    padding-right: var(--space-16);
  }
  .accent-card {
    padding: var(--space-16);
  }
  .hero-title {
    font-size: 1.875rem;
  }
  .map-canvas-block {
    padding: var(--space-16);
  }
}

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