:root {
  --main-bg: #F5F7F6;
  --surface: #FFFFFF;
  --deep-ink: #17202A;
  --data-blue: #2F6B8F;
  --signal-green: #3D7A5F;
  --warm-sand: #D8C5A3;
  --grid-line: #D8E0DD;
  --alert-amber: #C48A3A;
  --muted-text: #65706C;
  --focus-ring: rgba(47, 107, 143, 0.5);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--main-bg);
  color: var(--deep-ink);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--deep-ink);
}

a:focus, button:focus, input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--data-blue);
  outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--deep-ink);
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; margin-top: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
}

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

/* Layout & Grid System */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.grid-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}

.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }

@media (max-width: 768px) {
  .col-8, .col-6, .col-4 { grid-column: span 12; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}

/* Editorial Notebook Aesthetic */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--grid-line);
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--muted-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  display: block;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--grid-line);
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--deep-ink);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--deep-ink);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--data-blue);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--deep-ink);
  position: relative;
}
.mobile-menu-icon::before, .mobile-menu-icon::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--deep-ink);
  left: 0;
}
.mobile-menu-icon::before { top: -6px; }
.mobile-menu-icon::after { bottom: -6px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 2px;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--deep-ink);
  color: var(--surface);
}

.btn-primary:hover {
  background-color: var(--data-blue);
  color: var(--surface);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--grid-line);
  color: var(--deep-ink);
}

.btn-secondary:hover {
  border-color: var(--deep-ink);
  background-color: var(--surface);
}

/* Cards */
.card {
  background-color: var(--surface);
  border: 1px solid var(--grid-line);
  padding: 2rem;
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.card-number {
  font-family: var(--font-mono);
  color: var(--muted-text);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.card-text {
  color: var(--muted-text);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Flow Diagrams */
.flow-diagram {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 2rem;
  background-color: var(--surface);
  border: 1px solid var(--grid-line);
  margin: 2rem 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.flow-step {
  padding: 0.5rem 1rem;
  background-color: var(--main-bg);
  border: 1px solid var(--grid-line);
  color: var(--deep-ink);
}

.flow-arrow {
  color: var(--data-blue);
  font-weight: bold;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--surface);
}

.data-table th, .data-table td {
  border: 1px solid var(--grid-line);
  padding: 1rem;
  text-align: left;
}

.data-table th {
  background-color: var(--main-bg);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* Service Finder */
.service-finder-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.finder-btn {
  padding: 1.5rem;
  background-color: var(--surface);
  border: 1px solid var(--grid-line);
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.finder-btn:hover, .finder-btn.active {
  border-color: var(--data-blue);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.finder-result {
  display: none;
  background-color: var(--main-bg);
  border: 1px solid var(--grid-line);
  border-left: 4px solid var(--data-blue);
  padding: 2rem;
}
.finder-result.active {
  display: block;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.9375rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--grid-line);
  background-color: var(--surface);
  font-family: var(--font-sans);
  font-size: 1rem;
  border-radius: 2px;
}

.form-control:focus {
  border-color: var(--data-blue);
}

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

.form-error {
  color: var(--alert-amber);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: none;
}

/* Footer */
.site-footer {
  background-color: var(--deep-ink);
  color: var(--main-bg);
  padding: 4rem 0 2rem;
}

.site-footer a {
  color: var(--grid-line);
}

.site-footer a:hover {
  color: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  font-size: 0.9375rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  font-size: 0.875rem;
  color: var(--grid-line);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.disclaimer-text {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.6);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
  .service-finder-options { grid-template-columns: 1fr; }
}

/* Mobile Nav Styles */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 4.5rem;
  left: 0;
  width: 100%;
  height: calc(100vh - 4.5rem);
  background-color: var(--surface);
  z-index: 999;
  padding: 2rem 1.5rem;
  overflow-y: auto;
}

.mobile-nav-overlay.active {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-nav-links a {
  font-size: 1.25rem;
  color: var(--deep-ink);
  font-weight: 500;
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 0.5rem;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--deep-ink);
  color: var(--surface);
  padding: 1.5rem;
  z-index: 2000;
  display: none;
  box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
}
.cookie-banner.visible {
  display: block;
}

.cookie-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.cookie-text {
  font-size: 0.9375rem;
  color: var(--grid-line);
}
.cookie-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.cookie-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--surface);
  background: transparent;
  color: var(--surface);
  cursor: pointer;
  font-size: 0.875rem;
  font-family: var(--font-sans);
}
.cookie-btn-primary {
  background: var(--surface);
  color: var(--deep-ink);
}

/* Cookie Modal */
.cookie-modal {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(23, 32, 42, 0.8);
  z-index: 2001;
  display: none;
  align-items: center;
  justify-content: center;
}
.cookie-modal.visible {
  display: flex;
}
.cookie-modal-content {
  background: var(--surface);
  padding: 2rem;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  color: var(--deep-ink);
}
.cookie-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.cookie-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}
.cookie-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--grid-line);
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
@media (max-width: 992px) { .article-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .article-grid { grid-template-columns: 1fr; } }