:root {
  --bg-deep: #0a0f0d;
  --bg-card: #111916;
  --bg-surface: #182019;
  --fg: #e8ede9;
  --fg-muted: #8a9b8e;
  --fg-dim: #5a6b5e;
  --accent: #4ecdc4;
  --accent-warm: #f7b267;
  --accent-glow: rgba(78, 205, 196, 0.15);
  --border: rgba(78, 205, 196, 0.12);
  --radius: 16px;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

body {
  background: var(--bg-deep);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
}

/* ---- Hero ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  max-width: 780px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 16px 6px 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 2.5rem;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

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

.hero .lede {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.6;
}

.hero-visual {
  margin-top: 4rem;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  max-width: 500px;
}

.bss-type {
  aspect-ratio: 1;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--fg-muted);
  transition: all 0.3s ease;
}

.bss-type.active {
  background: var(--accent);
  color: var(--bg-deep);
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-glow);
}

/* ---- Problem Section ---- */
.problem {
  padding: 6rem 2rem;
  border-top: 1px solid var(--border);
}

.problem-inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.problem-stat {
  font-family: var(--font-display);
}

.problem-stat .number {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  color: var(--accent-warm);
  line-height: 1;
  letter-spacing: -0.04em;
}

.problem-stat .label {
  font-size: 1rem;
  color: var(--fg-muted);
  margin-top: 0.5rem;
  line-height: 1.5;
}

.problem-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.problem-text p {
  color: var(--fg-muted);
  font-size: 1rem;
}

/* ---- Features ---- */
.features {
  padding: 6rem 2rem;
}

.features-inner {
  max-width: 900px;
  margin: 0 auto;
}

.features-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.features h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 3.5rem;
  max-width: 600px;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color 0.3s ease;
}

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

.feature-card .icon {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* ---- Privacy Section ---- */
.privacy {
  padding: 6rem 2rem;
  border-top: 1px solid var(--border);
}

.privacy-inner {
  max-width: 900px;
  margin: 0 auto;
}

.privacy-banner {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3.5rem;
  position: relative;
  overflow: hidden;
}

.privacy-banner::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(247, 178, 103, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.privacy-banner .lock-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  display: block;
}

.privacy-banner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.privacy-banner p {
  color: var(--fg-muted);
  font-size: 1.05rem;
  max-width: 550px;
  margin-bottom: 2rem;
}

.privacy-points {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.privacy-point {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-deep);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg);
}

.privacy-point .check {
  color: var(--accent);
  font-weight: 700;
}

/* ---- Closing ---- */
.closing {
  padding: 8rem 2rem 4rem;
  text-align: center;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.closing h2 .warm {
  color: var(--accent-warm);
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.65;
}

.closing .dedication {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--fg-dim);
  font-style: italic;
}

/* ---- Footer ---- */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--fg);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-note {
  font-size: 0.8rem;
  color: var(--fg-dim);
  margin-top: 1.5rem;
  text-align: center;
  width: 100%;
}

/* ---- Responsive ---- */
@media (max-width: 680px) {
  .problem-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 4rem 1.5rem 3rem;
    min-height: auto;
  }

  .privacy-banner {
    padding: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 1rem;
  }

  .hero-visual {
    max-width: 100%;
  }
}