/* 
  SDG Strategy — AI Opportunity Assessment Landing Page
  - Palette toggle supports two schemes:
    1) Brand: (fill in your existing brand colors below)
    2) Yellow/Black variant
*/

:root {
  /* ---------- Brand Palette (Variant A) ---------- */
  /* TODO: Replace these with your actual brand colors */
  --brand-primary: #0F4C81;  /* Primary */
  --brand-accent:  #14B8A6;  /* Accent */
  --brand-bg:      #0A0F14;  /* Dark bg for hero overlays */
  --brand-surface: #0F172A;  /* Section alt bg */
  --brand-text:    #E5E7EB;  /* On dark text */
  --brand-muted:   #93A3B5;

  /* ---------- Yellow / Black (Variant B) ---------- */
  --yb-primary: #FFC300;
  --yb-black:   #111111;
  --yb-off:     #F7F7F7;
  --yb-gray:    #6B7280;
  --yb-accent:  #FFE475;

  /* Global tokens */
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 10px 30px rgba(0,0,0,0.15);
}

/* Default to Yellow/Black; toggled class .brand-palette will switch */
body {
  --color-primary: var(--yb-primary);
  --color-bg: var(--yb-off);
  --color-surface: #FFFFFF;
  --color-ink: #1F2937;
  --color-muted: var(--yb-gray);
  --color-hero-overlay: rgba(17,17,17,0.55);
  --color-header-bg: rgba(255, 255, 255, 0.8);
  --color-header-border: rgba(0,0,0,0.06);
}

/* Brand palette (Variant A) */
body.brand-palette {
  --color-primary: var(--brand-primary);
  --color-bg: var(--brand-bg);
  --color-surface: var(--brand-surface);
  --color-ink: var(--brand-text);
  --color-muted: var(--brand-muted);
  --color-hero-overlay: rgba(10,15,20,0.55);
  --color-header-bg: rgba(10,15,20,0.7);
  --color-header-border: rgba(255,255,255,0.12);
}

/* Base */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Montserrat', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-header-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.logo { height: 36px; width: auto; display: block; }
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.icon-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1.125rem;
  padding: 8px 10px;
  border-radius: 10px;
  transition: transform 0.15s ease;
}
.icon-btn:hover { transform: translateY(-1px); }
.toggle-label { font-size: 0.9rem; color: var(--color-muted); margin-left: 6px; }

/* Buttons */
.btn {
  --btn-bg: var(--color-primary);
  --btn-ink: #111;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 18px;
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-ink);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.btn:hover { transform: translateY(-2px); filter: brightness(0.98); }
.btn-lg { padding: 14px 22px; font-size: 1.05rem; }
.btn-primary { }
.pulse i { animation: pulse 1.8s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(2px); }
}

/* Hero */
.hero {
  position: relative;
  color: #fff;
  overflow: clip;
}
.hero .hero-bg {
  position: absolute; 
  inset: 0;
  z-index: 0;
}
.hero .hero-bg img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(0.9) contrast(1.1) brightness(0.9);
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--color-hero-overlay), rgba(0,0,0,0.55)); 
  z-index: 1;
}
.hero .hero-content {
  position: relative;
  padding: 110px 0 90px;
  color: #fff;
  z-index: 2;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  opacity: 0.9;
}
.hero h1 {
  font-size: clamp(1.8rem, 2.4rem + 1vw, 3.2rem);
  line-height: 1.15;
  margin: 10px 0 12px;
  font-weight: 800;
}
.hero .subhead {
  max-width: 720px;
  opacity: 0.95;
  font-weight: 500;
}
.hero-cta { margin-top: 22px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.price-note { color: #fff; opacity: 0.9; font-weight: 600; }

/* Sections */
.section { padding: 72px 0; background: var(--color-bg); }
.section.alt { background: var(--color-surface); color: inherit; }
.section-title {
  font-size: clamp(1.6rem, 1.2rem + 1vw, 2.2rem);
  margin: 0 0 24px;
  line-height: 1.2;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.step-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease;
}
body.brand-palette .step-card { background: #0e1320; color: var(--color-ink); }
.step-card:hover { transform: translateY(-3px); }
.step-icon { font-size: 1.6rem; margin-bottom: 10px; color: var(--color-primary); }

/* Deliverables */
.deliverables {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.deliverable {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  align-items: start;
}
body.brand-palette .deliverable { background: #0e1320; color: var(--color-ink); }
.del-icon { font-size: 1.7rem; color: var(--color-primary); }
.checklist { margin: 8px 0 0 0; padding-left: 18px; }
.checklist li { margin: 6px 0; }

.price-reminder {
  margin-top: 20px;
  color: var(--color-muted);
  font-weight: 600;
}

/* Why Now */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.pillar {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
body.brand-palette .pillar { background: #0e1320; color: var(--color-ink); }
.pillar-icon { font-size: 1.6rem; color: var(--color-primary); margin-bottom: 8px; }

/* Objections */
.objections details {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  margin-bottom: 12px;
}
body.brand-palette .objections details { background: #0e1320; color: var(--color-ink); }
.objections summary {
  cursor: pointer;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* About */
.about {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 28px;
  align-items: center;
}
.about-placeholder {
  height: 220px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255,255,255,0.6), rgba(255,255,255,0.2));
  display: grid;
  place-items: center;
  color: #444;
  box-shadow: var(--shadow);
  font-size: 3rem;
}
body.brand-palette .about-placeholder {
  background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  color: var(--color-muted);
}

/* CTA Band */
.cta-band {
  background: var(--color-primary);
  color: #111;
  text-align: center;
  padding: 56px 0;
}
.cta-sub {
  margin-top: 8px;
  font-weight: 600;
}

/* Ethics */
.ethics { padding: 28px 0; }
.ethics p { color: var(--color-muted); margin: 0; text-align: center; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-header-border);
  padding: 18px 0;
  background: rgba(255,255,255,0.6);
}
body.brand-palette .site-footer {
  background: rgba(10,15,20,0.5);
}

/* Reveal Animations */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.visible { opacity: 1; transform: translateY(0); transition: all 420ms ease-out; }

/* Responsive */
@media (max-width: 1024px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .deliverables { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr; }
  .about { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .hero .hero-content { padding: 90px 0 72px; }
  .header-inner { padding: 10px 0; }
}