/* ==========================================================================
   CONTORTED DA — Nordic Acoustic & Audio Engineering Research Institute
   Established 2012 | Bergen, Norway | Org. nr: 937 299 524
   ========================================================================== */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-subtle: #f1f5f9;
  --color-surface-card: #ffffff;
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-accent: #d97706;
  --color-accent-hover: #b45309;
  --color-accent-subtle: #fef3c7;
  --color-text-main: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  --color-border: #e2e8f0;
  --color-border-subtle: #cbd5e1;
  --color-success: #059669;
  --color-success-bg: #ecfdf5;
  --color-danger: #dc2626;
  
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Georgia', 'Cambria', 'Times New Roman', Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: 860px;
}

.section {
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
}

.section-subtle {
  background-color: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-dark {
  background-color: var(--color-primary);
  color: #ffffff;
}

.top-bar {
  background-color: #0b1120;
  color: #94a3b8;
  font-size: 0.8125rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.top-bar-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  color: #e2e8f0;
}

.top-bar-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.top-bar-links a {
  color: #94a3b8;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.top-bar-links a:hover {
  color: #ffffff;
}

.compliance-notice {
  background-color: #fef3c7;
  border-bottom: 1px solid #fde68a;
  color: #92400e;
  font-size: 0.8125rem;
  padding: 0.5rem 1rem;
  text-align: center;
}

.compliance-notice a {
  color: #78350f;
  font-weight: 600;
  text-decoration: underline;
  margin-left: 0.25rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.75rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
}

.brand-mark {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e293b 100%);
  border: 1px solid rgba(217, 119, 6, 0.4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  line-height: 1.1;
  text-transform: uppercase;
}

.brand-subtitle {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-accent);
  background-color: rgba(217, 119, 6, 0.06);
}

.nav-cta {
  background-color: var(--color-primary);
  color: #ffffff !important;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-left: 0.5rem;
}

.nav-cta:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-primary);
}

.mobile-menu {
  display: none;
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.mobile-menu.active {
  display: block;
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-bottom: 1px solid var(--color-surface-subtle);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw, 3.125rem); }
h2 { font-size: clamp(1.625rem, 3vw, 2.25rem); }
h3 { font-size: 1.375rem; }

p { margin-bottom: 1rem; }

.text-lead {
  font-size: 1.1875rem;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.hero {
  position: relative;
  background: radial-gradient(circle at top right, rgba(217, 119, 6, 0.08) 0%, transparent 60%),
              linear-gradient(180deg, #ffffff 0%, var(--color-surface-subtle) 100%);
  padding: 4.5rem 0 4rem;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-hover);
  border: 1px solid rgba(217, 119, 6, 0.2);
  margin-bottom: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-weight: 700;
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: var(--color-surface-subtle);
  border-color: var(--color-primary);
}

.stats-ribbon {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 2.125rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 0.375rem;
  font-weight: 500;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--color-border-subtle);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.card-desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  flex-grow: 1;
}

.article-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(217, 119, 6, 0.4);
}

.article-img-wrap {
  position: relative;
  aspect-ratio: 16 / 9;
  background-color: var(--color-surface-subtle);
  overflow: hidden;
}

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

.article-card:hover .article-img {
  transform: scale(1.04);
}

.article-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.article-tag {
  color: var(--color-accent-hover);
  background-color: var(--color-accent-subtle);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.article-title {
  font-size: 1.1875rem;
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.article-excerpt {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.calculator-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

.calc-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.calc-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
}

.calc-input, .calc-select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  font-size: 0.9375rem;
  transition: var(--transition);
}

.calc-input:focus, .calc-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

.calc-result-panel {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.calc-metric {
  font-size: 2.5rem;
  font-weight: 800;
  color: #f59e0b;
  line-height: 1;
  margin: 0.5rem 0;
}

.calc-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: #e2e8f0;
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.accordion-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.accordion-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
}

.accordion-icon {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  color: var(--color-accent);
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.accordion-item.open .accordion-content {
  padding-bottom: 1.25rem;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  cursor: pointer;
  transition: var(--transition);
}

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

.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
}

.form-control {
  width: 100%;
  padding: 0.8125rem 1rem;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  font-size: 0.9375rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
}

.form-feedback {
  display: none;
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-top: 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.form-feedback.success {
  display: block;
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(5, 150, 105, 0.3);
}

.form-feedback.error {
  display: block;
  background-color: #fef2f2;
  color: var(--color-danger);
  border: 1px solid rgba(220, 38, 38, 0.3);
}

.policy-page {
  padding: 3.5rem 0 5rem;
}

.policy-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-border);
}

.policy-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.policy-content {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
}

.policy-content h2 {
  font-size: 1.375rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-surface-subtle);
}

.policy-content h2:first-of-type {
  border-top: none;
  margin-top: 0;
}

.policy-content ul, .policy-content ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--color-text-main);
}

.policy-content li {
  margin-bottom: 0.375rem;
}

.policy-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}

.policy-table th, .policy-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.policy-table th {
  background-color: var(--color-surface-subtle);
  font-weight: 700;
  color: var(--color-primary);
}

.site-footer {
  background-color: #0b1120;
  color: #94a3b8;
  padding-top: 4.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-col-title {
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-disclaimer-box {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  margin-bottom: 2.5rem;
  color: #cbd5e1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.75rem 0;
  font-size: 0.8125rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.cookie-banner {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  max-width: 520px;
  background-color: #0f172a;
  color: #ffffff;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 999;
  display: none;
}

.cookie-banner.show {
  display: block;
}

.timeline {
  position: relative;
  margin: 2.5rem 0;
  padding-left: 2rem;
  border-left: 2px solid var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.45rem;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px var(--color-border);
}

.timeline-year {
  font-weight: 800;
  color: var(--color-accent);
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.375rem;
}

.timeline-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .stats-ribbon { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .calc-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .mobile-toggle { display: block; }
  .stats-ribbon { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .policy-content { padding: 1.5rem; }
}