/* CogniScale Inc — SAS Viya-inspired platform marketing */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

:root {
  --sas-blue: #0373BC;
  --sas-blue-dark: #005EA3;
  --sas-blue-light: #6EC2F5;
  --sas-navy: #002C4A;
  --sas-gray-bg: #F4F6F8;
  --sas-gray: #5A6872;
  --sas-gray-light: #8A9BA8;
  --white: #ffffff;
  --border: #D9E2E9;
  --font: 'IBM Plex Sans', 'Segoe UI', system-ui, sans-serif;
  --max: 1180px;
  --wide: 1280px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--sas-navy); background: var(--white); line-height: 1.6; font-size: 16px; }
img { max-width: 100%; display: block; height: auto; }
a { color: var(--sas-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }

.cs-container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.cs-container-wide { max-width: var(--wide); margin: 0 auto; padding: 0 24px; }

/* Header — SAS style */
.cs-header {
  background: var(--white); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.cs-header-inner {
  max-width: var(--wide); margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.cs-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.cs-logo img { height: 32px; }
.cs-logo span { font-size: 11px; color: var(--sas-gray); display: block; margin-top: 2px; }

.cs-nav { display: flex; gap: 4px; align-items: center; }
.cs-nav-item { position: relative; }
.cs-nav-item > span, .cs-nav-item > a {
  display: block; padding: 8px 14px; font-size: 14px; font-weight: 500;
  color: var(--sas-navy); border-radius: 4px; cursor: pointer;
}
.cs-nav-item > a:hover, .cs-nav-item > span:hover { background: var(--sas-gray-bg); text-decoration: none; }
.cs-dropdown {
  position: absolute; top: 100%; left: 0; min-width: 240px;
  background: #fff; border: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,44,74,0.12);
  padding: 8px; opacity: 0; visibility: hidden; transform: translateY(6px); transition: 0.2s;
}
.cs-nav-item:hover .cs-dropdown { opacity: 1; visibility: visible; transform: none; }
.cs-dropdown a { display: block; padding: 10px 12px; font-size: 14px; color: var(--sas-navy); border-radius: 4px; }
.cs-dropdown a:hover { background: var(--sas-gray-bg); text-decoration: none; color: var(--sas-blue); }

.cs-header-actions { display: flex; align-items: center; gap: 12px; }
.cs-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; font-size: 14px; font-weight: 600; border-radius: 4px;
  border: none; cursor: pointer; transition: 0.2s; font-family: inherit;
}
.cs-btn-primary { background: var(--sas-blue); color: #fff; }
.cs-btn-primary:hover { background: var(--sas-blue-dark); text-decoration: none; color: #fff; }
.cs-btn-outline { background: transparent; border: 2px solid var(--sas-blue); color: var(--sas-blue); }
.cs-btn-outline:hover { background: var(--sas-blue); color: #fff; text-decoration: none; }
.cs-btn-ghost { background: transparent; color: var(--sas-blue); padding: 10px 12px; }
.cs-menu-btn { display: none; background: none; border: none; font-size: 22px; cursor: pointer; }

.cs-drawer { position: fixed; inset: 0; z-index: 200; pointer-events: none; }
.cs-drawer.open { pointer-events: auto; }
.cs-drawer-bg { position: absolute; inset: 0; background: rgba(0,44,74,0.5); opacity: 0; transition: 0.3s; }
.cs-drawer.open .cs-drawer-bg { opacity: 1; }
.cs-drawer-panel {
  position: absolute; right: 0; top: 0; width: min(300px, 88vw); height: 100%;
  background: #fff; padding: 24px; transform: translateX(100%); transition: 0.3s; overflow-y: auto;
}
.cs-drawer.open .cs-drawer-panel { transform: none; }
.cs-drawer-close { background: none; border: none; font-size: 28px; cursor: pointer; margin-bottom: 16px; }
.cs-drawer-panel a { display: block; padding: 12px 0; border-bottom: 1px solid var(--border); font-weight: 500; color: var(--sas-navy); }

/* Hero — Viya style */
.cs-hero {
  background: linear-gradient(135deg, #002C4A 0%, #0373BC 100%);
  color: #fff; padding: 80px 0 96px; text-align: center;
}
.cs-hero-eyebrow { font-size: 14px; font-weight: 600; letter-spacing: 0.04em; margin-bottom: 16px; opacity: 0.9; }
.cs-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem); font-weight: 700; line-height: 1.15;
  max-width: 900px; margin: 0 auto 20px;
}
.cs-hero-lead {
  font-size: clamp(1rem, 2vw, 1.25rem); max-width: 780px; margin: 0 auto 32px;
  opacity: 0.92; font-weight: 400; line-height: 1.55;
}
.cs-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.cs-hero-actions .cs-btn-primary { background: #fff; color: var(--sas-blue); }
.cs-hero-actions .cs-btn-primary:hover { background: var(--sas-gray-bg); }
.cs-hero-actions .cs-btn-outline { border-color: rgba(255,255,255,0.6); color: #fff; }
.cs-hero-actions .cs-btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; text-decoration: none; }

/* Section intro */
.cs-section { padding: 72px 0; }
.cs-section-gray { background: var(--sas-gray-bg); }
.cs-section-dark { background: var(--sas-navy); color: #fff; }
.cs-section-dark a { color: var(--sas-blue-light); }
.cs-h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; line-height: 1.2; margin-bottom: 16px; }
.cs-h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 12px; }
.cs-lead { font-size: 18px; color: var(--sas-gray); max-width: 720px; margin-bottom: 32px; }
.cs-section-dark .cs-lead { color: rgba(255,255,255,0.75); }
.cs-text-center { text-align: center; }
.cs-text-center .cs-lead { margin-left: auto; margin-right: auto; }

/* Tabs — Viya three pillars */
.cs-tabs-section { padding: 0 0 72px; margin-top: -40px; position: relative; z-index: 2; }
.cs-tabs-card {
  background: #fff; border-radius: 8px; box-shadow: 0 12px 40px rgba(0,44,74,0.12);
  border: 1px solid var(--border); overflow: hidden; max-width: var(--wide); margin: 0 auto;
}
.cs-tab-header { display: flex; border-bottom: 1px solid var(--border); background: var(--sas-gray-bg); }
.cs-tab-btn {
  flex: 1; padding: 18px 16px; font-size: 15px; font-weight: 600; background: none; border: none;
  cursor: pointer; color: var(--sas-gray); border-bottom: 3px solid transparent; transition: 0.2s;
  font-family: inherit;
}
.cs-tab-btn.active { color: var(--sas-blue); background: #fff; border-bottom-color: var(--sas-blue); }
.cs-tab-pane { display: none; padding: 40px; }
.cs-tab-pane.active { display: block; }
.cs-tab-pane p { color: var(--sas-gray); margin-bottom: 16px; max-width: 640px; }
.cs-link { font-weight: 600; color: var(--sas-blue); display: inline-flex; align-items: center; gap: 6px; }
.cs-link:hover { text-decoration: none; gap: 10px; }
.cs-link::after { content: '→'; }

/* Pillar detail blocks */
.cs-pillar-block { padding: 64px 0; border-bottom: 1px solid var(--border); }
.cs-pillar-block:last-child { border-bottom: none; }
.cs-split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.cs-split.reverse .cs-split-media { order: 2; }
.cs-split-media img { border-radius: 8px; width: 100%; aspect-ratio: 16/10; object-fit: cover; box-shadow: var(--shadow, 0 8px 24px rgba(0,44,74,0.1)); }

/* Quote block */
.cs-quote-block {
  background: var(--sas-gray-bg); border-left: 4px solid var(--sas-blue);
  padding: 32px 40px; margin: 48px 0; font-size: 18px; font-style: italic; color: var(--sas-navy);
  line-height: 1.6;
}
.cs-quote-source { font-size: 14px; font-style: normal; color: var(--sas-gray); margin-top: 12px; }

/* Benefit grid — 4 cols */
.cs-benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; }
.cs-benefit {
  padding: 28px 24px; background: #fff; border: 1px solid var(--border); border-radius: 8px;
  transition: 0.25s;
}
.cs-benefit:hover { box-shadow: 0 8px 24px rgba(0,44,74,0.08); transform: translateY(-2px); }
.cs-benefit h3 { font-size: 17px; margin-bottom: 10px; color: var(--sas-navy); }
.cs-benefit p { font-size: 14px; color: var(--sas-gray); line-height: 1.55; }

/* Stats */
.cs-stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; text-align: center; padding: 48px 0; }
.cs-stat strong { display: block; font-size: 2.5rem; font-weight: 700; color: var(--sas-blue); line-height: 1; margin-bottom: 8px; }
.cs-stat span { font-size: 14px; color: var(--sas-gray); }
.cs-stat-note { font-size: 13px; color: var(--sas-gray-light); margin-top: 8px; font-style: italic; }

/* Reviews carousel */
.cs-reviews { padding: 48px 0; overflow: hidden; }
.cs-review-track { display: flex; gap: 24px; transition: transform 0.4s ease; }
.cs-review {
  flex: 0 0 min(100%, 520px); padding: 32px; background: #fff;
  border: 1px solid var(--border); border-radius: 8px; font-size: 16px; color: var(--sas-navy);
}
.cs-review q { display: block; font-style: italic; line-height: 1.6; margin-bottom: 12px; }
.cs-review cite { font-size: 13px; color: var(--sas-gray); font-style: normal; }
.cs-carousel-nav { display: flex; gap: 8px; justify-content: center; margin-top: 24px; }
.cs-carousel-btn {
  width: 40px; height: 40px; border: 1px solid var(--border); background: #fff;
  border-radius: 50%; cursor: pointer; font-size: 18px; color: var(--sas-blue);
}
.cs-carousel-btn:hover { background: var(--sas-gray-bg); }

/* Analyst cards */
.cs-analyst-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cs-analyst {
  padding: 28px; background: #fff; border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; color: var(--sas-gray); line-height: 1.6;
}
.cs-analyst q { display: block; font-style: italic; color: var(--sas-navy); margin-bottom: 12px; }

/* Impact cards */
.cs-impact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cs-impact {
  border-radius: 8px; overflow: hidden; background: #fff; border: 1px solid var(--border);
  transition: 0.25s;
}
.cs-impact:hover { box-shadow: 0 8px 24px rgba(0,44,74,0.1); }
.cs-impact img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.cs-impact-body { padding: 20px; }
.cs-impact-tag { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--sas-blue); margin-bottom: 8px; }
.cs-impact h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.cs-impact p { font-size: 13px; color: var(--sas-gray); }

/* Story block */
.cs-story { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 48px 0; border-top: 1px solid var(--border); }
.cs-story blockquote { font-size: 22px; font-weight: 500; line-height: 1.45; color: var(--sas-navy); margin-bottom: 16px; }
.cs-story cite { font-size: 14px; color: var(--sas-gray); font-style: normal; display: block; }

/* FAQ */
.cs-faq { max-width: 800px; margin: 0 auto; }
.cs-faq-item { border-bottom: 1px solid var(--border); }
.cs-faq-q {
  width: 100%; text-align: left; padding: 20px 0; background: none; border: none;
  font-size: 16px; font-weight: 600; color: var(--sas-navy); cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; font-family: inherit;
}
.cs-faq-q::after { content: '+'; font-size: 22px; color: var(--sas-blue); font-weight: 400; }
.cs-faq-item.open .cs-faq-q::after { content: '−'; }
.cs-faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.cs-faq-item.open .cs-faq-a { max-height: 400px; }
.cs-faq-a p { padding: 0 0 20px; font-size: 15px; color: var(--sas-gray); line-height: 1.65; }

/* CTA triplet */
.cs-cta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cs-cta-card {
  padding: 36px 28px; background: var(--sas-gray-bg); border-radius: 8px; text-align: center;
  border: 1px solid var(--border); transition: 0.25s;
}
.cs-cta-card:hover { border-color: var(--sas-blue); box-shadow: 0 8px 24px rgba(3,115,188,0.1); }
.cs-cta-card h3 { font-size: 20px; margin-bottom: 10px; }
.cs-cta-card p { font-size: 14px; color: var(--sas-gray); margin-bottom: 20px; }

/* Page hero */
.cs-page-hero {
  background: linear-gradient(135deg, #002C4A, #0373BC); color: #fff; padding: 72px 0 48px;
}
.cs-breadcrumb { font-size: 13px; opacity: 0.7; margin-bottom: 12px; }
.cs-breadcrumb a { color: rgba(255,255,255,0.85); }
.cs-page-hero h1 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); font-weight: 700; margin-bottom: 12px; }
.cs-page-hero p { font-size: 17px; opacity: 0.88; max-width: 640px; }

/* Content */
.cs-content { padding: 56px 0 80px; }
.cs-content .hero-img { width: 100%; max-height: 400px; object-fit: cover; border-radius: 8px; margin-bottom: 28px; }
.cs-intro { font-size: 18px; color: var(--sas-gray); margin-bottom: 28px; max-width: 720px; }
.cs-h2-content { font-size: 22px; font-weight: 600; margin: 32px 0 12px; color: var(--sas-navy); }
.cs-list { margin: 0 0 20px 1.2em; }
.cs-list li { margin-bottom: 8px; color: var(--sas-gray); list-style: disc; }
.cs-card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.cs-card {
  border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: #fff;
  transition: 0.25s; display: block; color: inherit;
}
.cs-card:hover { box-shadow: 0 8px 24px rgba(0,44,74,0.1); text-decoration: none; transform: translateY(-2px); }
.cs-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.cs-card-body { padding: 20px; }
.cs-card-body h3 { font-size: 17px; margin-bottom: 8px; }
.cs-card-body p { font-size: 14px; color: var(--sas-gray); }
.cs-sidebar { padding: 24px; background: var(--sas-gray-bg); border-radius: 8px; border: 1px solid var(--border); }
.cs-sidebar h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 12px; }
.cs-article-grid { display: grid; grid-template-columns: 1fr 280px; gap: 40px; }
.cs-process { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin: 24px 0; }
.cs-process-step { padding: 20px; border: 1px solid var(--border); border-radius: 8px; background: var(--sas-gray-bg); }
.cs-process-step em { font-size: 11px; font-weight: 700; color: var(--sas-blue); text-transform: uppercase; }
.cs-process-step strong { display: block; margin: 8px 0 4px; }
.cs-process-step span { font-size: 13px; color: var(--sas-gray); }
.cs-notice { font-size: 13px; color: var(--sas-gray-light); margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--border); }
.cs-form label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.cs-form input, .cs-form textarea, .cs-form select {
  width: 100%; padding: 12px; margin-bottom: 16px; border: 1px solid var(--border);
  border-radius: 4px; font: inherit;
}
.cs-form textarea { min-height: 120px; resize: vertical; }
.cs-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }

/* Footer — SAS dark */
.cs-footer { background: var(--sas-navy); color: rgba(255,255,255,0.7); padding: 56px 0 0; font-size: 14px; }
.cs-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.cs-footer h4 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 16px; }
.cs-footer a { display: block; color: rgba(255,255,255,0.6); margin-bottom: 8px; }
.cs-footer a:hover { color: var(--sas-blue-light); text-decoration: none; }
.cs-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px;
}

@media (max-width: 960px) {
  .cs-nav, .cs-header-actions .cs-btn-primary { display: none; }
  .cs-menu-btn { display: block; }
  .cs-split, .cs-story, .cs-article-grid, .cs-contact-grid, .cs-footer-grid { grid-template-columns: 1fr; }
  .cs-benefit-grid, .cs-impact-grid, .cs-cta-grid, .cs-analyst-grid { grid-template-columns: 1fr 1fr; }
  .cs-stats-row { grid-template-columns: 1fr; }
  .cs-tab-header { flex-direction: column; }
  .cs-split.reverse .cs-split-media { order: 0; }
}
@media (max-width: 600px) {
  .cs-benefit-grid, .cs-impact-grid, .cs-cta-grid, .cs-analyst-grid { grid-template-columns: 1fr; }
}