/* ============================================
   Five Stacks — Landing Page
   Light theme, esgforsuppliers aesthetic
   ============================================ */

:root {
  --color-bg: #FDFBF7;
  --color-bg-alt: #F4F1EB;
  --color-surface: #FFFFFF;
  --color-ink: #2A2A2A;
  --color-text: #3A3A3A;
  --color-text-muted: #6B6B6B;
  --color-accent: #2E7D5E;
  --color-accent-hover: #245F49;
  --color-accent-light: #E8F3ED;
  --color-border: #E5E3DE;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Hero ---- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.75rem;
  color: var(--color-accent);
  margin-bottom: 24px;
  font-weight: 600;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.1;
  margin-bottom: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--color-ink);
}

.tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: #257050;
  font-weight: 500;
  margin-bottom: 16px;
}

.subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto 40px;
}

.cta-button {
  display: inline-block;
  padding: 14px 40px;
  background: var(--color-accent);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.cta-button:hover {
  background: var(--color-accent-hover);
}

/* ---- Sections ---- */

.section {
  padding: 100px 24px;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 20px;
  text-align: center;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* ---- Option A / B ---- */

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.col {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 32px;
}

.col h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.col p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.col-highlight {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.col-highlight h3 {
  color: var(--color-accent);
}

.col-highlight p {
  color: var(--color-text);
}

.centered-note {
  text-align: center;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 1.05rem;
}

/* ---- Stacks ---- */

.stacks {
  display: grid;
  gap: 2px;
}

.stack {
  background: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  padding: 32px 32px 32px 40px;
  position: relative;
}

.stack-number {
  position: absolute;
  left: -3px;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.stack h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
  color: var(--color-ink);
}

.stack-quote {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-accent);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.stack p:last-child {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ---- Four Properties ---- */

.section-properties {
  background: #EBF2ED;
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 720px;
  margin: 0 auto;
}

.prop {
  text-align: left;
  padding: 28px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.prop-icon {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.prop h3 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--color-accent);
  font-weight: 600;
}

.prop p {
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 450;
  line-height: 1.6;
}

.prop-closer {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

/* ---- Persona Cards ---- */

.persona-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 780px;
  margin: 0 auto 56px;
}

.persona-card {
  background: var(--color-bg-alt);
  padding: 28px 24px;
  text-align: left;
  line-height: 1.8;
}

.persona-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 10px;
  font-weight: 600;
}

.persona-card p {
  color: var(--color-text);
  font-size: 0.95rem;
}

.persona-card .highlight {
  color: var(--color-accent);
  font-style: normal;
  font-weight: 600;
}

/* ---- Manifesto ---- */

.manifesto {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.manifesto-soft {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.manifesto-strong {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ---- Waitlist CTA ---- */

.section-cta {
  background: var(--color-bg-alt);
  text-align: center;
}

.tally-embed {
  max-width: 460px;
  margin: 0 auto 16px;
}

.small-print {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---- Footer ---- */

.footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
  }

  .persona-cards {
    grid-template-columns: 1fr;
  }

  .stack {
    padding-left: 48px;
  }
}

@media (max-width: 560px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 64px 24px;
  }
}