/* ─────────────────────────────────────────────────────────────
   Data GOLD — styles.css
   Dark theme matching Second Brain OS product description
   Palette: obsidian backgrounds · gold accents · paper text
   Fonts:   Cormorant Garamond (display) · DM Mono (labels/nav)
───────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500&family=DM+Mono:wght@300;400;500&display=swap');

/* ── TOKENS ── */
:root {
  --gold:        #C9A84C;
  --gold-light:  #E8C97A;
  --gold-dim:    #8B6F2E;
  --gold-faint:  rgba(201, 168, 76, 0.07);
  --obsidian:    #0A0A0A;
  --charcoal:    #141414;
  --slate:       #1E1E1E;
  --ash:         #2A2A2A;
  --border:      #2E2E2E;
  --fog:         #6B6B6B;
  --smoke:       #9A9A9A;
  --paper:       #F2EDE4;
  --paper-dim:   #C8C0B4;
  --urgent:      #C85C3A;

  --display: 'Cormorant Garamond', Georgia, serif;
  --mono:    'DM Mono', 'Courier New', monospace;
  --sans:    'DM Mono', 'Courier New', monospace;

  --ink-muted: var(--smoke);
  --radius:    2px;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ── BASE ── */
body {
  background: var(--obsidian);
  color: var(--paper);
  font-family: var(--display);
  font-size: 17px;
  font-weight: 300;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}

/* grain texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.35;
}

h1, h2, h3, h4, h5 {
  font-family: var(--display);
  font-weight: 400;
  line-height: 1.15;
  color: var(--paper);
}

h1 { font-size: clamp(36px, 5vw, 60px); }
h2 { font-size: clamp(28px, 3.5vw, 40px); }
h3 { font-size: 22px; }
h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold-dim); font-weight: 400; }

h1 em, h2 em { font-style: italic; color: var(--gold-light); }

p { color: var(--smoke); margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }
p strong { color: var(--paper); font-weight: 600; }
p em { color: var(--paper-dim); font-style: italic; }

a { color: var(--gold); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--gold-light); }

ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ── LAYOUT ── */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 36px;
}

/* ── EYEBROW ── */
.eyebrow {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: 14px;
}

/* ── LEAD ── */
.lead {
  font-size: 18px;
  font-weight: 300;
  font-style: italic;
  color: var(--smoke);
  line-height: 1.65;
  margin-bottom: 20px;
}

/* ── GOLD RULE ── */
hr.gold-rule {
  border: none;
  border-top: 1px solid var(--gold-dim);
  margin: 40px 0;
  opacity: 0.5;
}

/* ── BUTTONS ── */
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 13px 28px;
  cursor: pointer;
  transition: all 0.15s;
  border: none;
  font-weight: 500;
  text-decoration: none;
}

.btn-primary {
  background: var(--gold-dim);
  color: var(--obsidian);
}
.btn-primary:hover {
  background: var(--gold);
  color: var(--obsidian);
}

.btn-secondary {
  background: none;
  border: 1px solid var(--border);
  color: var(--smoke);
}
.btn-secondary:hover {
  border-color: var(--gold-dim);
  color: var(--gold);
}

/* ── HEADER / NAV ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ash);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 36px;
  max-width: 1080px;
  margin: 0 auto;
}

.nav-logo img { height: 36px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
  padding: 8px 14px;
  transition: color 0.15s;
  text-decoration: none;
}

.nav-links a:hover { color: var(--paper); }
.nav-links a.active { color: var(--gold); }

.nav-cta {
  background: var(--gold-dim) !important;
  color: var(--obsidian) !important;
  padding: 8px 18px !important;
}
.nav-cta:hover { background: var(--gold) !important; }
.nav-cta.active { background: var(--gold) !important; color: var(--obsidian) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--smoke);
  font-size: 22px;
  cursor: pointer;
}

/* ── PAGE HEADER ── */
.page-header {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--ash);
}

/* ── HERO ── */
.hero {
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--ash);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: center;
}

.hero-visual svg {
  width: 100%;
  max-width: 320px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
}

/* ── PILLARS ── */
.pillars-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--ash);
}

.pillars-header {
  max-width: 600px;
  margin-bottom: 56px;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--ash);
  border: 1px solid var(--ash);
}

.pillar {
  background: var(--charcoal);
  padding: 32px 28px;
  transition: background 0.15s;
}

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

.pillar-letter {
  font-family: var(--display);
  font-size: 48px;
  font-weight: 300;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 16px;
}

.pillar h3 {
  font-size: 18px;
  font-weight: 400;
  margin-bottom: 10px;
  color: var(--paper);
}

.pillar p {
  font-size: 14px;
  color: var(--fog);
  line-height: 1.6;
}

/* ── AUDIENCE ── */
.audience-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--ash);
}

.audience-header {
  margin-bottom: 48px;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--ash);
  border: 1px solid var(--ash);
}

.audience-card {
  background: var(--charcoal);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: background 0.15s;
}

.audience-card:hover { background: var(--slate); }

.audience-card h3 {
  font-size: 22px;
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--paper);
}

.audience-card p {
  font-size: 14px;
  color: var(--fog);
  line-height: 1.65;
  flex: 1;
}

.card-link {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-dim);
  transition: color 0.15s;
  text-decoration: none;
}

.card-link:hover { color: var(--gold); }

/* ── PROOF ── */
.proof-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--ash);
}

.proof-section h2 {
  font-size: 18px;
  font-weight: 300;
  font-style: italic;
  color: var(--smoke);
  margin-bottom: 28px;
}

.proof-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.proof-list span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
  border: 1px solid var(--ash);
  padding: 7px 14px;
  background: var(--charcoal);
}

/* ── CTA SECTION ── */
.cta-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--ash);
  text-align: center;
}

.cta-section h2 { margin-bottom: 12px; }
.cta-section .lead { max-width: 520px; margin: 0 auto 32px; }

/* ── FRAMEWORK SECTIONS ── */
.framework-section {
  padding: 72px 0;
  border-bottom: 1px solid var(--ash);
  background: var(--obsidian);
}

.framework-section.alt {
  background: var(--charcoal);
}

.framework-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 56px;
  align-items: start;
}

.framework-letter {
  font-family: var(--display);
  font-size: 96px;
  font-weight: 300;
  color: var(--gold);
  line-height: 1;
  padding-top: 8px;
}

.deliverables {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--ash);
  border: 1px solid var(--ash);
}

.deliverables li {
  background: var(--charcoal);
  padding: 12px 18px;
  font-size: 14px;
  color: var(--smoke);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.15s;
}

.deliverables li:hover { background: var(--slate); }

.deliverables li::before {
  content: '→';
  color: var(--gold-dim);
  font-family: var(--mono);
  font-size: 11px;
  flex-shrink: 0;
}

/* ── CLIMBER SECTIONS ── */
.climber-section {
  padding: 72px 0;
  border-bottom: 1px solid var(--ash);
  background: var(--obsidian);
}

.climber-section.alt {
  background: var(--charcoal);
}

.climber-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 56px;
  align-items: start;
}

.climber-portrait {
  position: sticky;
  top: 100px;
}

.climber-portrait h2 {
  font-size: 32px;
  margin-bottom: 8px;
}

.climber-portrait .who {
  font-size: 14px;
  font-style: italic;
  color: var(--fog);
  margin-top: 8px;
}

.climber-content h3 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin: 32px 0 10px;
}

.climber-content h3:first-child { margin-top: 0; }

/* ── ABOUT ── */
.section-tight {
  padding: 72px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.about-photo img {
  width: 100%;
  filter: grayscale(20%) contrast(1.05);
  border: 1px solid var(--ash);
}

.caption {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--fog);
  margin-top: 10px;
  text-transform: uppercase;
}

.about-content h2 {
  margin-bottom: 16px;
  font-size: 30px;
}

.body-dark {
  background: var(--slate);
  border-left: 2px solid var(--gold);
  padding: 16px 20px;
  color: var(--paper-dim) !important;
  font-style: italic;
  font-size: 15px;
  line-height: 1.65;
}

/* ── BOOK CALLOUT ── */
.book-callout {
  background: var(--slate);
  border: 1px solid var(--ash);
  border-left: 3px solid var(--gold);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.book-callout h3 {
  font-size: 22px;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 6px;
}

.book-callout p {
  font-style: italic;
  color: var(--smoke);
  font-size: 15px;
}

/* ── FRAMEWORK LIST (about page) ── */
.framework-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--ash);
  border: 1px solid var(--ash);
  margin-top: 8px;
}

.framework-list li {
  background: var(--charcoal);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  transition: background 0.15s;
}

.framework-list li:hover { background: var(--slate); }

.framework-list .name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
  line-height: 1.5;
  padding-top: 2px;
}

.framework-list .desc {
  font-size: 13px;
  color: var(--fog);
  line-height: 1.6;
}

/* ── CONTACT ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h3 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin: 32px 0 10px;
  font-weight: 400;
}

.contact-info h3:first-child { margin-top: 0; }

.contact-info p { font-size: 15px; }

.contact-info a {
  color: var(--gold);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.contact-info a:hover { color: var(--gold-light); }

/* ── CONTACT FORM ── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: var(--charcoal);
  border: 1px solid var(--ash);
  padding: 36px 32px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-dim);
  font-weight: 400;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--slate);
  border: 1px solid var(--border);
  color: var(--paper);
  font-family: var(--display);
  font-size: 16px;
  font-weight: 300;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--fog);
  font-style: italic;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--gold-dim);
}

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

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238B6F2E' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}

.form-group select option {
  background: var(--slate);
  color: var(--paper);
}

.form-note {
  font-size: 12px !important;
  color: var(--fog) !important;
  font-style: italic;
  text-align: center;
  margin-top: -4px;
}

/* ── FOOTER ── */
.site-footer {
  background: var(--charcoal);
  border-top: 1px solid var(--ash);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand img { height: 32px; margin-bottom: 12px; }

.footer-brand p {
  font-size: 13px;
  font-style: italic;
  color: var(--fog);
}

.footer-col h4 {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: 16px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

.footer-col ul li a {
  font-size: 13px;
  color: var(--fog);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col ul li a:hover { color: var(--paper); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--ash);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--fog);
  letter-spacing: 0.1em;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .pillars { grid-template-columns: 1fr 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .framework-row { grid-template-columns: 80px 1fr; gap: 32px; }
  .framework-letter { font-size: 64px; }
  .climber-grid { grid-template-columns: 1fr; }
  .climber-portrait { position: static; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 280px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .framework-list li { grid-template-columns: 1fr; gap: 6px; }
}

@media (max-width: 600px) {
  .nav { padding: 16px 20px; }
  .container { padding: 0 20px; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--charcoal);
    border-bottom: 1px solid var(--ash);
    padding: 16px 20px;
    gap: 4px;
    z-index: 100;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .pillars { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .hero { padding: 64px 0 48px; }
  .page-header { padding: 56px 0 48px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; }
}