/* =====================================================
   NORTHBRIDGE RESEARCH — Landing Page Stylesheet
   Design: Intelligent, clean, typography-forward.
   Think: The design equivalent of a well-written
   research report. Dark, editorial, no hype.
   ===================================================== */

/* ————— Google Fonts ————— */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,300;1,9..144,400;1,9..144,600&display=swap');

/* ————— Design Tokens ————— */
:root {
  --bg-primary: #0c0c10;
  --bg-surface: #12121a;
  --bg-card: #161620;
  --bg-card-hover: #1b1b26;
  --border: #24242f;
  --border-subtle: #1c1c28;
  --text-primary: #eee8d6;
  --text-secondary: #888890;
  --text-muted: #525260;
  --accent: #c8a14a;
  --accent-bright: #e2b95a;
  --accent-dim: #8a6d30;
  --accent-glow: rgba(200, 161, 74, 0.08);
  --accent-glow-strong: rgba(200, 161, 74, 0.14);

  --font-display: 'Syne', sans-serif;
  --font-body: 'Fraunces', Georgia, serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --max-w: 1100px;
  --section-pad: clamp(72px, 10vw, 120px);
  --gutter: clamp(20px, 5vw, 60px);

  --transition: 0.22s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: clamp(16px, 1.1vw, 18px);
  line-height: 1.65;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Text selection */
::selection { background: var(--accent-dim); color: var(--bg-primary); }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ————— Typography Scale ————— */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* ————— Layout Utilities ————— */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section-label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent-dim);
}

/* ————— Navigation ————— */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 var(--gutter);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(12, 12, 16, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-mark {
  width: 26px;
  height: 26px;
  border: 1.5px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0;
}

.nav-tagline {
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.nav-cta {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  background: transparent;
}

.nav-cta:hover {
  background: var(--accent-glow-strong);
  border-color: var(--accent);
  color: var(--accent-bright);
}

/* ————— Hero ————— */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(64px + clamp(60px, 8vw, 100px)) var(--gutter) clamp(60px, 8vw, 100px);
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  position: relative;
}

.hero-inner {
  max-width: 780px;
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--accent-dim);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(52px, 7.5vw, 104px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 36px;
}

.hero-headline em {
  font-style: normal;
  color: var(--accent);
}

.hero-headline .sub {
  display: block;
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: -0.02em;
  margin-top: 6px;
}

.hero-description {
  font-size: clamp(16px, 1.4vw, 20px);
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 44px;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.btn-primary {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(200, 161, 74, 0.25);
}

.btn-primary:active { transform: translateY(0); }

.btn-primary svg { flex-shrink: 0; }

.hero-meta {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ————— Stagger Divider ————— */
.divider-stagger {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-subtle);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.divider-stagger span {
  background: var(--bg-primary);
  padding: 16px 24px;
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ————— Section: What We Do ————— */
.section {
  padding: var(--section-pad) var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-narrow {
  max-width: 700px;
}

.section-headline {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 24px;
  line-height: 1.1;
}

.section-body {
  font-size: clamp(16px, 1.2vw, 18px);
  color: var(--text-secondary);
  line-height: 1.75;
  font-weight: 300;
}

.section-body + .section-body {
  margin-top: 16px;
}

.lead-text {
  font-size: clamp(18px, 1.6vw, 22px);
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.65;
}

/* ————— Pillars Grid ————— */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 56px;
}

.pillar {
  background: var(--bg-surface);
  padding: 40px 36px;
  transition: var(--transition);
  position: relative;
}

.pillar:hover {
  background: var(--bg-card);
}

.pillar-icon {
  width: 36px;
  height: 36px;
  margin-bottom: 20px;
  color: var(--accent-dim);
}

.pillar-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.pillar-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  font-weight: 300;
}

/* ————— Sample Content (Brief Teasers) ————— */
.brief-teasers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.brief-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.brief-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent-dim);
  transition: var(--transition);
}

.brief-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border);
}

.brief-card:hover::before {
  background: var(--accent);
}

.brief-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.brief-badge {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.brief-date {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--text-muted);
}

.brief-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  line-height: 1.2;
}

.brief-excerpt {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  font-weight: 300;
}

.brief-read-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  transition: var(--transition);
}

.brief-read-link:hover {
  color: var(--accent-bright);
  gap: 10px;
}

/* ————— Content Categories ————— */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 48px;
}

.category-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.category-chip:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.category-name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.category-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  font-weight: 300;
}

/* ————— About the Founder ————— */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: start;
}

.about-credentials {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.credential-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.credential-label {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.credential-value {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.about-body {
  font-size: clamp(16px, 1.2vw, 18px);
  color: var(--text-secondary);
  line-height: 1.75;
  font-weight: 300;
}

.about-body p + p { margin-top: 16px; }

/* ————— Newsletter CTA ————— */
.newsletter-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.newsletter-inner {
  max-width: 640px;
  text-align: center;
  margin: 0 auto;
  padding: var(--section-pad) var(--gutter);
}

.newsletter-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  line-height: 1.1;
}

.newsletter-sub {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.65;
  font-weight: 300;
}

.newsletter-form {
  display: flex;
  gap: 10px;
  max-width: 480px;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 18px;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
}

.newsletter-input::placeholder {
  color: var(--text-muted);
}

.newsletter-input:focus {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.newsletter-btn {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.newsletter-btn:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(200, 161, 74, 0.2);
}

.newsletter-btn:active { transform: translateY(0); }

.newsletter-note {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-display);
  letter-spacing: 0.02em;
}

/* ————— Footer ————— */
.footer {
  padding: 40px var(--gutter);
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-link {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-link:hover { color: var(--text-secondary); }

.footer-disclaimer {
  width: 100%;
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-display);
  line-height: 1.6;
  letter-spacing: 0.02em;
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  margin-top: 8px;
}

/* ————— Responsive ————— */
@media (max-width: 768px) {
  .nav-cta { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .newsletter-form { flex-direction: column; }
  .divider-stagger { display: none; }
  .hero-headline { font-size: clamp(42px, 10vw, 72px); }
  .hero-headline .sub { font-size: clamp(22px, 5.5vw, 36px); }
  .brief-teasers { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 16px; }
}