:root {
  --bg: #0a0f1a;
  --bg-elevated: #111827;
  --bg-card: #1a2235;
  --fg: #e8edf5;
  --fg-muted: #8b97b0;
  --accent: #4ade80;
  --accent-dim: rgba(74, 222, 128, 0.12);
  --accent-glow: rgba(74, 222, 128, 0.25);
  --border: rgba(139, 151, 176, 0.12);
  --tag-new: #60a5fa;
  --tag-alert: #f87171;
  --tag-move: #fbbf24;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.accent { color: var(--accent); }

/* ── Hero ── */
.hero {
  padding: 120px 40px 100px;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 460px;
  line-height: 1.7;
}

/* ── Monitor Card ── */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pulse-ring {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 1px solid var(--accent-glow);
  animation: pulse 4s ease-out infinite;
}

.delay-1 { animation-delay: 1.3s; }
.delay-2 { animation-delay: 2.6s; }

@keyframes pulse {
  0% { transform: scale(0.8); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

.monitor-card {
  position: relative;
  z-index: 2;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.4);
}

.monitor-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 0.8rem;
  color: var(--fg-muted);
  font-family: var(--font-display);
}

.monitor-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 2s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.monitor-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

.tag {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  margin-top: 2px;
}

.tag-new { background: rgba(96, 165, 250, 0.15); color: var(--tag-new); }
.tag-alert { background: rgba(248, 113, 113, 0.15); color: var(--tag-alert); }
.tag-move { background: rgba(251, 191, 36, 0.15); color: var(--tag-move); }

/* ── Problem ── */
.problem {
  padding: 120px 40px;
  background: var(--bg-elevated);
}

.problem-container {
  max-width: 1000px;
  margin: 0 auto;
}

.problem h2 {
  font-size: 2.5rem;
  margin-bottom: 48px;
  text-align: center;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.problem-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.problem-number {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.problem-label {
  font-size: 0.9rem;
  color: var(--fg-muted);
}

.problem-statement {
  text-align: center;
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ── How ── */
.how {
  padding: 120px 40px;
  max-width: 900px;
  margin: 0 auto;
}

.how-header {
  margin-bottom: 64px;
}

.how-header h2 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.how-header p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 560px;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  align-items: start;
}

.step-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
}

.step-content h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

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

/* ── Features ── */
.features {
  padding: 120px 40px;
  background: var(--bg-elevated);
}

.features-container {
  max-width: 1000px;
  margin: 0 auto;
}

.features h2 {
  font-size: 2.5rem;
  margin-bottom: 56px;
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.feature-card {
  padding: 40px;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--accent-glow);
}

.feature-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ── Closing ── */
.closing {
  padding: 140px 40px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.closing h2 {
  font-size: 2.8rem;
  margin-bottom: 32px;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto;
}

/* ── Footer ── */
.site-footer {
  padding: 60px 40px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-bottom: 4px;
}

.footer-meta {
  font-size: 0.8rem;
  color: var(--fg-muted);
  opacity: 0.5;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero { padding: 80px 24px 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero h1 { font-size: 2.4rem; }
  .hero-visual { display: none; }
  .problem { padding: 80px 24px; }
  .problem h2 { font-size: 1.8rem; }
  .problem-grid { grid-template-columns: 1fr; gap: 16px; }
  .problem-card { padding: 24px 16px; }
  .problem-number { font-size: 2rem; }
  .how { padding: 80px 24px; }
  .how-header h2 { font-size: 1.8rem; }
  .step { grid-template-columns: 48px 1fr; gap: 16px; }
  .step-num { font-size: 2rem; }
  .features { padding: 80px 24px; }
  .features h2 { font-size: 1.8rem; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 24px; }
  .closing { padding: 80px 24px; }
  .closing h2 { font-size: 2rem; }
  .site-footer { padding: 40px 24px; }
}