/* Your Body Battery — marketing site (yourbodybattery.online) */

:root {
  --bg-deep: #070a08;
  --bg-elevated: #0f1411;
  --bg-card: rgba(20, 28, 24, 0.72);
  --stroke: rgba(255, 255, 255, 0.08);
  --text: #e8f0eb;
  --muted: #8a9a90;
  --accent: #34c759;
  --accent-dim: rgba(52, 199, 89, 0.15);
  --sleep: #5e5ce6;
  --stress: #bf5af2;
  --strain: #ff9f0a;
  --glow: rgba(52, 199, 89, 0.35);
  --radius: 20px;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #000;
  z-index: 100;
}

.skip-link:focus {
  left: 0;
}

/* Background */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(52, 199, 89, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 30%, rgba(94, 92, 230, 0.12), transparent 50%),
    radial-gradient(ellipse 50% 35% at 0% 70%, rgba(191, 90, 242, 0.1), transparent 45%),
    var(--bg-deep);
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 75%);
}

.wrap {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(7, 10, 8, 0.75);
  border-bottom: 1px solid var(--stroke);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.25);
  box-shadow: 0 0 24px var(--glow);
}

.logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.logo-mark svg {
  width: 20px;
  height: 20px;
}

nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
}

nav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(4rem, 10vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  nav ul {
    display: none;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 0 0 1rem;
}

.hero-highlight {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text);
  max-width: 40ch;
  margin: 0 0 1rem;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 36ch;
  margin: 0 0 1.75rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(180deg, #3dd66a 0%, var(--accent) 100%);
  color: #052210;
  box-shadow: 0 4px 24px rgba(52, 199, 89, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 32px rgba(52, 199, 89, 0.45);
}

.btn-placeholder {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
  border: 1px solid var(--stroke);
  cursor: not-allowed;
}

.btn-placeholder svg {
  opacity: 0.5;
}

.platform-note {
  font-size: 0.85rem;
  color: var(--muted);
}

.platform-note strong {
  color: var(--text);
  font-weight: 600;
}

/* Illustration column */
.hero-art {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 320px;
}

.phone-watch {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 1 / 1;
}

/* Sections */
section {
  padding: clamp(3rem, 6vw, 5rem) 0;
}

section h2 {
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.section-intro {
  color: var(--muted);
  max-width: 56ch;
  margin: 0 0 2.5rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  backdrop-filter: blur(12px);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.metric-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.4rem;
  vertical-align: middle;
}

.dot-bb {
  background: var(--accent);
}
.dot-sleep {
  background: var(--sleep);
}
.dot-stress {
  background: var(--stress);
}
.dot-strain {
  background: var(--strain);
}

/* Feature rows with drawings */
.feature-showcase {
  display: grid;
  gap: 3rem;
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(52, 199, 89, 0.06), rgba(20, 28, 24, 0.5));
  border: 1px solid var(--stroke);
  border-radius: calc(var(--radius) + 4px);
}

.feature-block:nth-child(even) {
  background: linear-gradient(135deg, rgba(94, 92, 230, 0.06), rgba(20, 28, 24, 0.5));
}

.feature-block:nth-child(3) {
  background: linear-gradient(135deg, rgba(191, 90, 242, 0.06), rgba(20, 28, 24, 0.5));
}

.feature-block:nth-child(4) {
  background: linear-gradient(135deg, rgba(255, 159, 10, 0.08), rgba(20, 28, 24, 0.5));
}

@media (max-width: 800px) {
  .feature-block {
    grid-template-columns: 1fr;
  }

  .feature-block .draw-col {
    order: -1;
  }
}

.feature-block h3 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.feature-block ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.feature-block li {
  margin-bottom: 0.4rem;
}

.draw-col {
  display: flex;
  justify-content: center;
}

/* Copy blocks */
.copy-slab {
  border-left: 3px solid var(--accent);
  padding: 1rem 0 1rem 1.25rem;
  margin: 2rem 0;
  background: rgba(52, 199, 89, 0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.copy-slab p {
  margin: 0;
  color: var(--text);
  font-size: 0.98rem;
}

.copy-slab + .copy-slab {
  margin-top: 1rem;
}

.promo-lines {
  font-style: italic;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 52ch;
}

.promo-lines p {
  margin: 0 0 1rem;
}

.promo-lines p:last-child {
  margin-bottom: 0;
}

/* Watch section */
.watch-band {
  text-align: center;
  padding: 3rem 1.5rem;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
}

.watch-band p {
  max-width: 48ch;
  margin-inline: auto;
  color: var(--muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--stroke);
  padding: 2.5rem 0 3rem;
  margin-top: 2rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  align-items: flex-start;
}

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

.footer-links a {
  color: var(--muted);
  font-size: 0.9rem;
}

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

.copyright {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 1.5rem 0 0;
}

/* Privacy page */
.article {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 0 4rem;
}

.article h1 {
  font-size: 2rem;
}

.article h2 {
  font-size: 1.2rem;
  margin-top: 2rem;
}

.article p,
.article ul {
  color: var(--muted);
}

.article ul {
  padding-left: 1.2rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-weight: 500;
}