:root {
  --bg: #0a0e1a;
  --bg-surface: #111827;
  --bg-card: #1a2035;
  --fg: #e8e6e1;
  --fg-muted: #8b8a87;
  --fg-dim: #5a5957;
  --accent: #e8a634;
  --accent-glow: rgba(232, 166, 52, 0.15);
  --accent-soft: #f5d89a;
  --urgent: #e85454;
  --success: #4ade80;
  --info: #60a5fa;
  --radius: 12px;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  padding: 6rem 5vw 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232,166,52,0.2), transparent);
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(232,166,52,0.3);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero h1 .highlight {
  color: var(--accent);
  position: relative;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 480px;
  line-height: 1.7;
}

/* Briefing Card Mock */
.briefing-card {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  transform: perspective(800px) rotateY(-2deg) rotateX(1deg);
  transition: transform 0.4s ease;
}

.briefing-card:hover {
  transform: perspective(800px) rotateY(0deg) rotateX(0deg);
}

.briefing-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
  margin-bottom: 1.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.briefing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.briefing-line {
  padding: 0.6rem 0;
  font-size: 0.9rem;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.briefing-line:last-of-type { border-bottom: none; }

.tag {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  flex-shrink: 0;
}

.tag.urgent { background: rgba(232,84,84,0.15); color: var(--urgent); }
.tag.action { background: rgba(232,166,52,0.15); color: var(--accent); }
.tag.info { background: rgba(96,165,250,0.12); color: var(--info); }
.tag.done { background: rgba(74,222,128,0.12); color: var(--success); }

.briefing-footer {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  color: var(--fg-dim);
  font-family: var(--font-display);
  letter-spacing: 0.02em;
}

/* === HOW IT WORKS === */
.how-it-works {
  padding: 8rem 5vw;
  background: var(--bg-surface);
  position: relative;
}

.how-it-works::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232,166,52,0.15), transparent);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.how-it-works h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 4rem;
  max-width: 600px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.step:last-child { border-bottom: none; }

.step-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(232,166,52,0.2);
  line-height: 1;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--accent-soft);
}

.step-content p {
  color: var(--fg-muted);
  max-width: 550px;
  line-height: 1.7;
}

/* === BRIEFING SECTION === */
.briefing-section {
  padding: 8rem 5vw;
  position: relative;
}

.briefing-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.briefing-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.briefing-text p {
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.stat-row {
  display: flex;
  gap: 3rem;
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-dim);
}

/* Inbox Stack */
.inbox-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.inbox-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  font-size: 0.85rem;
  transition: background 0.2s;
}

.inbox-item:first-child { border-radius: var(--radius) var(--radius) 0 0; }
.inbox-item:last-child { border-radius: 0 0 var(--radius) var(--radius); }

.inbox-item + .inbox-item { border-top: none; }

.inbox-item.flagged {
  background: rgba(232,84,84,0.06);
  border-color: rgba(232,84,84,0.15);
}

.sender {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--fg);
}

.subject {
  color: var(--fg-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-badge {
  font-size: 0.7rem;
  font-family: var(--font-display);
  font-weight: 500;
  white-space: nowrap;
  color: var(--success);
}

.inbox-item.flagged .status-badge { color: var(--urgent); }

/* === PHILOSOPHY === */
.philosophy {
  padding: 8rem 5vw;
  background: var(--bg-surface);
  position: relative;
}

.philosophy::before,
.philosophy::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232,166,52,0.15), transparent);
}

.philosophy::before { top: 0; }
.philosophy::after { bottom: 0; }

.manifesto h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
  max-width: 700px;
}

.principles {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.principle-contrast {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.principle-contrast .old {
  font-size: 1.1rem;
  color: var(--fg-dim);
  text-decoration: line-through;
  text-decoration-color: rgba(255,255,255,0.15);
}

.principle-contrast .new {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-soft);
}

/* === CLOSING === */
.closing {
  padding: 10rem 5vw;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.closing-content {
  position: relative;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.closing p {
  color: var(--fg-muted);
  max-width: 550px;
  margin: 0 auto;
  font-size: 1.1rem;
  line-height: 1.7;
}

/* === FOOTER === */
.site-footer {
  padding: 3rem 5vw;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
}

.footer-note {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 4rem 5vw 3rem;
    gap: 3rem;
  }

  .hero-visual {
    order: -1;
  }

  .briefing-card {
    transform: none;
  }

  .step {
    grid-template-columns: 50px 1fr;
    gap: 1rem;
  }

  .step-number {
    font-size: 2rem;
  }

  .briefing-split {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .stat-row {
    gap: 2rem;
  }

  .inbox-item {
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
  }

  .inbox-item .subject {
    display: none;
  }

  .how-it-works,
  .briefing-section,
  .philosophy {
    padding: 5rem 5vw;
  }

  .closing {
    padding: 6rem 5vw;
  }
}