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

:root {
  --bg: #0a0a1a;
  --bg-elevated: #12122a;
  --bg-card: #1a1a35;
  --text: #e0e0f0;
  --text-muted: #8888aa;
  --accent: #6c8cff;
  --accent-hover: #8aa4ff;
  --border: #2a2a4a;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-small {
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  background: var(--accent);
  color: #fff;
}

.btn-small:hover {
  background: var(--accent-hover);
}

/* Hero */
.hero {
  padding: 10rem 0 6rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.2;
  margin-bottom: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.hint {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Sections */
section {
  padding: 5rem 0;
}

section h2 {
  font-size: 1.8rem;
  margin-bottom: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

section p {
  color: var(--text-muted);
  max-width: 640px;
}

/* Problem */
.problem {
  border-top: 1px solid var(--border);
}

.problem p {
  margin-bottom: 1rem;
}

.problem strong {
  color: var(--text);
}

/* Steps */
.how-it-works {
  background: var(--bg-elevated);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.step-number {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.95rem;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.feature h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.feature p {
  font-size: 0.9rem;
  max-width: none;
}

.feature code {
  background: rgba(108, 140, 255, 0.15);
  color: var(--accent);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.85em;
}

/* Evidence */
.evidence {
  background: var(--bg-elevated);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.evidence-item {
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
}

.evidence-item strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.evidence-item p {
  font-size: 0.9rem;
  max-width: none;
}

/* Privacy */
.privacy ul {
  list-style: none;
  max-width: 640px;
}

.privacy li {
  padding: 0.5rem 0;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.privacy li::before {
  content: "✓ ";
  color: var(--accent);
  font-weight: 700;
}

.privacy li code {
  background: rgba(108, 140, 255, 0.15);
  color: var(--accent);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.85em;
}

/* CTA */
.cta {
  text-align: center;
  padding: 6rem 0;
  background: var(--bg-elevated);
}

.cta h2 {
  font-size: 2rem;
}

.cta p {
  color: var(--text-muted);
  margin: 0 auto 2rem;
}

/* Footer */
footer {
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}