/* SignalWatch — Dark, authoritative, sharp */

:root {
  --bg: #0c0c0e;
  --bg-2: #111115;
  --bg-3: #18181d;
  --fg: #f0ece4;
  --fg-2: #8a8691;
  --fg-3: #504e59;
  --accent: #e9c46a;
  --accent-dim: #c9a83a;
  --red: #e63946;
  --green: #2a9d8f;
  --border: rgba(240, 236, 228, 0.08);
  --border-strong: rgba(240, 236, 228, 0.14);
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 40px;
  background: rgba(12, 12, 14, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.tagline {
  font-size: 12px;
  color: var(--fg-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 400;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 40px 100px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(233, 196, 106, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
}
.hero-inner {
  max-width: 760px;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 28px;
}
.pulse-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(233, 196, 106, 0.4);
  animation: pulse-anim 2s infinite;
}
@keyframes pulse-anim {
  0% { box-shadow: 0 0 0 0 rgba(233, 196, 106, 0.4); }
  70% { box-shadow: 0 0 0 8px rgba(233, 196, 106, 0); }
  100% { box-shadow: 0 0 0 0 rgba(233, 196, 106, 0); }
}
.hero-headline {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(52px, 7vw, 88px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 32px;
}
.hero-headline em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--fg-2);
  max-width: 560px;
  font-weight: 300;
}

/* WHAT */
.what {
  padding: 100px 40px;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.what-inner { max-width: 1100px; margin: 0 auto; }
.what-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-3);
  margin-bottom: 56px;
  font-weight: 500;
}
.what-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.what-item {
  padding: 36px 32px;
  background: var(--bg-3);
  border: 1px solid var(--border);
}
.what-icon {
  color: var(--accent);
  margin-bottom: 20px;
  opacity: 0.9;
}
.what-item h3 {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}
.what-item p {
  font-size: 14px;
  color: var(--fg-2);
  line-height: 1.65;
}

/* HOW */
.how {
  padding: 100px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.how-inner { max-width: 760px; margin: 0 auto; }
.how-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-3);
  margin-bottom: 64px;
  font-weight: 500;
}
.how-steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}
.step:first-child { border-top: 1px solid var(--border); }
.step-num {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 48px;
  font-weight: 300;
  color: var(--fg-3);
  line-height: 1;
}
.step-content h3 {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}
.step-content p {
  font-size: 15px;
  color: var(--fg-2);
  line-height: 1.65;
  max-width: 500px;
}

/* PREVIEW / DASHBOARD */
.preview {
  padding: 100px 40px;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.preview-inner { max-width: 860px; margin: 0 auto; }
.preview-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-3);
  margin-bottom: 36px;
  font-weight: 500;
}
.preview-frame {
  background: var(--bg-3);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  overflow: hidden;
}
.email-frame { padding: 0; }
.email-header {
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.email-from {
  display: flex;
  align-items: center;
  gap: 14px;
}
.sw-badge {
  width: 36px; height: 36px;
  background: var(--accent);
  color: #0c0c0e;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Crimson Pro', serif;
  font-weight: 700;
  font-size: 14px;
}
.email-sender {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
}
.email-subject {
  font-size: 12px;
  color: var(--fg-2);
  margin-top: 1px;
}
.email-body { padding: 28px; }
.brief-section { margin-bottom: 28px; }
.brief-section:last-of-type { margin-bottom: 0; }
.brief-section-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-3);
  font-weight: 500;
  margin-bottom: 12px;
}
.brief-item {
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 8px;
}
.brief-item:last-child { margin-bottom: 0; }
.source-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(233, 196, 106, 0.12);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
}
.brief-item p {
  font-size: 13px;
  color: var(--fg-2);
  line-height: 1.55;
}
.brief-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--fg-3);
  font-style: italic;
  font-family: 'Crimson Pro', serif;
}

/* CLOSING */
.closing {
  padding: 120px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.closing::before {
  content: 'informed';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: 'Crimson Pro', serif;
  font-size: clamp(80px, 15vw, 180px);
  font-weight: 700;
  color: rgba(240, 236, 228, 0.02);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.04em;
}
.closing-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}
.closing-content h2 {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--fg);
}
.closing-content p {
  font-size: 17px;
  color: var(--fg-2);
  line-height: 1.7;
  font-weight: 300;
}

/* FOOTER */
footer {
  padding: 48px 40px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner { max-width: 1100px; margin: 0 auto; text-align: center; }
.footer-logo {
  font-family: 'Crimson Pro', serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--fg-3);
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 12px;
  color: var(--fg-3);
  margin-bottom: 20px;
  letter-spacing: 0.06em;
}
.footer-copy {
  font-size: 11px;
  color: var(--fg-3);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  nav { padding: 16px 20px; }
  .hero { padding: 100px 20px 80px; }
  .what { padding: 60px 20px; }
  .how { padding: 60px 20px; }
  .preview { padding: 60px 20px; }
  .closing { padding: 80px 20px; }
  footer { padding: 40px 20px; }
  .what-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 60px 1fr; gap: 20px; padding: 36px 0; }
  .step-num { font-size: 36px; }
}
@media (max-width: 480px) {
  .hero-headline { font-size: 44px; }
  .hero-sub { font-size: 16px; }
  .tagline { display: none; }
}