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

:root {
  --bg: #061112;
  --bg-soft: #0b1f22;
  --panel: rgba(255, 255, 255, 0.07);
  --panel-border: rgba(255, 255, 255, 0.14);
  --text: #f5fbfc;
  --muted: #a9bdc2;
  --accent: #38d5e6;
  --accent-soft: rgba(56, 213, 230, 0.14);
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

html {
  font-size: 16px;
}

body {
  background: var(--bg);
  background-image: radial-gradient(ellipse at 50% 0%, #0d3038 0%, var(--bg) 60%);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── NAV ── */

header {
  border-bottom: 1px solid var(--panel-border);
  background: rgba(6, 17, 18, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 52px;
  display: flex;
  align-items: center;
}

.nav-brand {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin-left: auto;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}

/* ── MAIN ── */

main {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  width: 100%;
}

/* ── HERO (home page) ── */

.hero {
  text-align: center;
  padding: 4rem 0 3.5rem;
}

.hero-orb {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, #7cf5ff, #20c0d0 48%, #0a5a64);
  box-shadow: 0 0 48px rgba(56, 213, 230, 0.30), 0 0 12px rgba(56, 213, 230, 0.20);
  margin: 0 auto 2rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 1.5rem;
  line-height: 1.5;
}

.hero-intro {
  font-size: 0.975rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ── FEATURE GRID ── */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 3rem 0 2.5rem;
}

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

.card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}

.card p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ── WELLNESS NOTE ── */

.wellness-note {
  background: var(--accent-soft);
  border: 1px solid rgba(56, 213, 230, 0.22);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
  margin: 2rem 0;
}

/* ── BUTTONS / CTA ── */

.cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  justify-content: center;
}

.btn-outline {
  display: inline-block;
  padding: 0.55rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background 0.15s, color 0.15s;
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--bg);
}

/* ── CONTENT PAGES ── */

.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--panel-border);
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.page-header .subtitle {
  color: var(--muted);
  font-size: 0.9rem;
}

.content-section {
  margin-bottom: 2rem;
}

.content-section h2 {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.content-section p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.content-section p + p {
  margin-top: 0.75rem;
}

/* ── FOOTER ── */

footer {
  border-top: 1px solid var(--panel-border);
  background: var(--bg-soft);
  padding: 1.25rem 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.footer-sep {
  margin: 0 0.5rem;
  opacity: 0.35;
}

/* ── RESPONSIVE ── */

@media (max-width: 600px) {
  .hero h1 {
    font-size: 2.25rem;
  }

  .hero-tagline {
    font-size: 1.05rem;
  }

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

  .page-header h1 {
    font-size: 1.75rem;
  }
}

@media (max-width: 420px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}