/* ========================================
   ECHO — Landing Page Stylesheet
   ======================================== */

:root {
  --bg: #FAF7F0;
  --fg: #0D0D0D;
  --fg-secondary: #555555;
  --accent: #3B82F6;
  --accent-light: #DBEAFE;
  --surface: #FFFFFF;
  --border: #E0E0E0;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Navigation ---- */
.nav {
  padding: 24px 48px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 240, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 16px; }
.nav-logo {
  font-family: 'Outfit', sans-serif;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--fg);
}
.nav-tagline {
  font-size: 13px;
  color: var(--fg-secondary);
  font-weight: 400;
  padding-left: 16px;
  border-left: 1px solid var(--border);
}

/* ---- Shared section styles ---- */
.section-inner { max-width: 1160px; margin: 0 auto; padding: 0 48px; }
.section-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.section-heading {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--fg);
  margin-bottom: 56px;
}

/* ---- Hero ---- */
.hero { padding: 80px 0 100px; }
.hero-grid {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero-headline {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 28px;
}
.hero-sub {
  font-size: 18px;
  color: #444444;
  line-height: 1.65;
  margin-bottom: 36px;
  max-width: 460px;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  font-size: 12px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  background: var(--fg);
  color: var(--bg);
}

/* Briefing card */
.briefing-card {
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.briefing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.briefing-logo {
  font-family: 'Outfit', sans-serif;
  font-size: 16px;
  font-weight: 800;
  color: var(--accent);
}
.briefing-date { font-size: 11px; color: #888888; }
.briefing-section { margin-bottom: 20px; }
.briefing-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--fg-secondary);
  margin-bottom: 12px;
}
.briefing-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; }
.briefing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--fg-secondary);
  margin-top: 6px;
  flex-shrink: 0;
}
.briefing-item p { font-size: 13px; color: #333333; line-height: 1.5; }
.briefing-alert .briefing-dot { background: #EF4444; }
.briefing-alert p { color: #111111; font-weight: 500; }

/* ---- What It Does ---- */
.what-it-does { padding: 100px 0; background: var(--surface); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.feature-card { padding: 0; }
.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 18px;
}
.feature-title {
  font-family: 'Outfit', sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 14px;
  color: #555555;
  line-height: 1.6;
}

/* ---- How It Works ---- */
.how-it-works { padding: 100px 0; background: var(--bg); }
.steps-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}
.step { flex: 1; }
.step-number {
  font-family: 'Outfit', sans-serif;
  font-size: 40px;
  font-weight: 800;
  color: var(--accent);
  display: block;
  margin-bottom: 16px;
  letter-spacing: -2px;
}
.step-title {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
}
.step-desc { font-size: 14px; color: #555555; line-height: 1.6; }
.step-connector { display: flex; align-items: center; padding-top: 20px; flex-shrink: 0; }

/* ---- Why Echo ---- */
.why-echo { padding: 100px 0; background: var(--surface); }
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.why-body { font-size: 16px; color: #444444; line-height: 1.7; margin-bottom: 20px; }

/* Comparison table */
.comparison { background: var(--bg); border-radius: 16px; padding: 32px; border: 1px solid var(--border); }
.comp-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.comp-row:last-child { border-bottom: none; }
.comp-label { font-size: 14px; color: var(--fg-secondary); font-weight: 500; }
.comp-val { font-size: 14px; font-weight: 600; color: var(--fg); }
.comp-highlight { color: var(--accent); font-size: 16px; }

/* ---- Closing ---- */
.closing { padding: 100px 0; background: var(--fg); }
.closing-text {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 700;
  color: var(--bg);
  line-height: 1.2;
  letter-spacing: -1px;
  text-align: center;
  margin-bottom: 24px;
}
.closing-sub {
  font-size: 16px;
  color: #AAAAAA;
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---- Footer ---- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-logo {
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: var(--fg);
  display: block;
  margin-bottom: 10px;
}
.footer-desc { font-size: 13px; color: var(--fg-secondary); max-width: 380px; line-height: 1.6; }
.footer-copy { font-size: 12px; color: #AAAAAA; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 48px; }
  .steps-row { flex-direction: column; }
  .step-connector { display: none; }
  .section-inner { padding: 0 24px; }
  .hero-grid { padding: 0 24px; }
  .nav { padding: 20px 24px; }
  .footer-inner { flex-direction: column; gap: 24px; text-align: center; }
}

@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero-headline { font-size: 36px; }
}