/* ===== BodyBuddy Landing Page ===== */

:root {
  --bg: #0d1117;
  --bg-alt: #14161a;
  --bg-card: rgba(255, 255, 255, 0.035);
  --border-soft: rgba(255, 255, 255, 0.09);
  --accent: rgb(213, 255, 95);
  --accent-soft: rgba(213, 255, 95, 0.12);
  --accent-border: rgba(213, 255, 95, 0.4);
  --text-main: #f2f4f0;
  --text-muted: #9aa3ac;
  --font-display: "Suez One", "Heebo", sans-serif;
  --font-body: "Heebo", sans-serif;
  --radius-lg: 28px;
  --radius-md: 20px;
  --max-width: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

/* ---------- Ambient background ---------- */

.bg-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(560px 420px at 18% -5%, rgba(213, 255, 95, 0.10), transparent 65%),
    radial-gradient(680px 520px at 105% 20%, rgba(213, 255, 95, 0.06), transparent 60%),
    radial-gradient(900px 700px at 50% 115%, rgba(213, 255, 95, 0.05), transparent 60%),
    var(--bg);
}

.bg-fx::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at 50% 0%, black, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, black, transparent 75%);
  opacity: 0.5;
}

main, header, footer { position: relative; z-index: 1; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(13, 17, 23, 0.72);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-logo { width: 34px; height: 34px; object-fit: contain; }

.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 15px 32px;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, opacity 0.25s ease;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
  box-shadow: 0 0 0 0 rgba(213, 255, 95, 0);
}

.btn-primary:hover {
  background: rgba(213, 255, 95, 0.2);
  box-shadow: 0 6px 28px rgba(213, 255, 95, 0.18);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  border-color: var(--accent-border);
  color: var(--accent);
}

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

.btn-small { padding: 10px 22px; font-size: 0.88rem; }

.btn-link {
  color: var(--text-muted);
  padding: 15px 6px;
  font-weight: 500;
}

.btn-link:hover { color: var(--accent); }

/* ---------- Hero ---------- */

.hero {
  padding: 96px 24px 72px;
  display: flex;
  justify-content: center;
}

.hero-inner {
  max-width: 680px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo-wrap {
  width: 132px;
  height: 132px;
  margin-bottom: 28px;
  filter: drop-shadow(0 12px 40px rgba(213, 255, 95, 0.16));
}

.hero-logo { width: 100%; height: 100%; object-fit: contain; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  line-height: 1.1;
  margin-bottom: 18px;
}

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

.hero-tagline {
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- About ---------- */

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.about { padding: 20px 0 88px; }

.about-text {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  font-size: 1.12rem;
  color: var(--text-muted);
}

/* ---------- Section titles ---------- */

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  text-align: center;
  margin-bottom: 48px;
}

/* ---------- Features ---------- */

.features { padding: 20px 0 96px; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-border);
  background: rgba(213, 255, 95, 0.045);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-icon svg { width: 26px; height: 26px; }

.feature-card h3 {
  font-size: 1.12rem;
  margin-bottom: 10px;
  font-weight: 700;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.96rem;
}

/* ---------- Download ---------- */

.download {
  padding: 30px 24px 110px;
  text-align: center;
}

.download-sub {
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
}

.store-buttons {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-store {
  padding: 14px 28px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

.btn-store svg { width: 24px; height: 24px; }

.store-text { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.2; }

.store-text small { font-size: 0.7rem; font-weight: 400; opacity: 0.85; }

.btn-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-soft);
  color: var(--text-muted);
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 40px 24px;
  background: var(--bg-alt);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text-main);
}

.footer-logo { width: 26px; height: 26px; }

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.92rem;
  color: var(--text-muted);
}

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

.copyright {
  width: 100%;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  margin-top: 8px;
}

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card.reveal:nth-child(2) { transition-delay: 0.08s; }
.feature-card.reveal:nth-child(3) { transition-delay: 0.16s; }
.feature-card.reveal:nth-child(4) { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  .hero { padding: 64px 20px 56px; }
  .hero-logo-wrap { width: 104px; height: 104px; }
  .header-inner { padding: 12px 18px; }
  .btn { padding: 13px 24px; font-size: 0.92rem; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}