/* ═══════════════════════════════════════════
   BiOmicAge — Shared Stylesheet
   Clean white · Green accent · DM fonts
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300&family=DM+Mono:wght@400;500&display=swap');

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

:root {
  --white:        #ffffff;
  --off-white:    #f8f9f6;
  --surface:      #f2f4f0;
  --border:       #e4e8e0;
  --border-mid:   #d0d6c8;
  --muted:        #8a9280;
  --ink:          #161c12;
  --ink-soft:     #3a4234;
  --ink-light:    #5a6652;

  --green:        #1a6b42;
  --green-mid:    #238a56;
  --green-light:  #e6f2eb;
  --green-pale:   #f0f7f3;
  --green-glow:   rgba(26,107,66,0.12);

  --tag-bg:       #eef1eb;
  --radius-sm:    6px;
  --radius:       10px;
  --radius-lg:    16px;
  --radius-xl:    24px;

  --shadow-xs:    0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.06);
  --shadow:       0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg:    0 12px 48px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-xl:    0 24px 80px rgba(0,0,0,0.12);

  --nav-h:        66px;
  --max-w:        1160px;
  --section-py:   88px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--off-white); }
::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 10px; }

/* ══════════════════ NAV ══════════════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: var(--nav-h);
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 5%;
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }

.nav-inner {
  width: 100%; max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-logo {
  display: flex; align-items: center; gap: 9px;
  font-family: 'DM Serif Display', serif;
  font-size: 1.18rem; color: var(--ink);
  letter-spacing: -0.01em;
}
.nav-logo-mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--green);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.nav-logo-mark svg { width: 16px; height: 16px; fill: white; }

.nav-links {
  display: flex; align-items: center; gap: 4px; list-style: none;
}
.nav-links a {
  padding: 6px 14px; border-radius: var(--radius-sm);
  font-size: 0.875rem; font-weight: 500; color: var(--ink-soft);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--green); background: var(--green-pale); }
.nav-links a.active { color: var(--green); font-weight: 600; }

.nav-cta {
  background: var(--green); color: white;
  border: none; border-radius: var(--radius);
  padding: 9px 22px; font-size: 0.875rem; font-weight: 600;
  cursor: pointer; font-family: 'DM Sans', sans-serif;
  display: inline-block;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(26,107,66,0.3);
}
.nav-cta:hover {
  background: var(--green-mid);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(26,107,66,0.35);
}

/* Mobile hamburger */
.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); border-radius: 2px;
  transition: all 0.3s;
}

/* ══════════════════ PAGE WRAPPER ══════════════════ */
.page-body { padding-top: var(--nav-h); }

/* ══════════════════ SECTION UTILITIES ══════════════════ */
.section { padding: var(--section-py) 5%; }
.section-inner { max-width: var(--max-w); margin: 0 auto; }

.section-label {
  display: inline-block;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--green);
  margin-bottom: 10px;
}
.section-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  color: var(--ink); line-height: 1.15;
  letter-spacing: -0.015em; margin-bottom: 16px;
}
.section-sub {
  font-size: 1rem; color: var(--ink-light);
  max-width: 540px; line-height: 1.75; font-weight: 300;
}

/* ══════════════════ BUTTONS ══════════════════ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: var(--radius); padding: 12px 26px;
  font-size: 0.93rem; font-weight: 600;
  font-family: 'DM Sans', sans-serif;
  cursor: pointer; border: none; transition: all 0.2s;
}
.btn-primary {
  background: var(--green); color: white;
  box-shadow: 0 2px 10px rgba(26,107,66,0.28);
}
.btn-primary:hover {
  background: var(--green-mid);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(26,107,66,0.35);
}
.btn-outline {
  background: transparent; color: var(--ink);
  border: 1.5px solid var(--border-mid);
}
.btn-outline:hover {
  border-color: var(--green); color: var(--green);
  transform: translateY(-2px);
}
.btn-ghost {
  background: rgba(255,255,255,0.1); color: white;
  border: 1.5px solid rgba(255,255,255,0.2);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.4);
}
.btn-lg { padding: 15px 34px; font-size: 1rem; }

/* ══════════════════ BADGES / TAGS ══════════════════ */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--green-light); color: var(--green);
  border: 1px solid rgba(26,107,66,0.18);
  border-radius: 100px; padding: 5px 14px;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge::before {
  content: ''; width: 6px; height: 6px;
  background: var(--green); border-radius: 50%; flex-shrink: 0;
}

.tool-tag {
  background: var(--tag-bg); color: var(--ink-soft);
  border-radius: var(--radius-sm); padding: 3px 10px;
  font-size: 0.72rem; font-weight: 500;
  font-family: 'DM Mono', monospace;
  border: 1px solid var(--border);
}

/* ══════════════════ CARDS ══════════════════ */
.card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: rgba(26,107,66,0.2);
}

/* ══════════════════ SURFACE SECTION ══════════════════ */
.surface {
  background: var(--off-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ══════════════════ FOOTER ══════════════════ */
.footer {
  background: var(--ink);
  padding: 64px 5% 32px;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-grid {
  display: grid; grid-template-columns: 2.2fr 1fr 1fr 1fr;
  gap: 48px; padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 32px;
}
.footer-brand-logo {
  display: flex; align-items: center; gap: 9px;
  font-family: 'DM Serif Display', serif;
  font-size: 1.1rem; color: white; margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.84rem; color: rgba(255,255,255,0.38);
  line-height: 1.75; max-width: 240px;
}
.footer-col h4 {
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(255,255,255,0.45);
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.footer-col a {
  font-size: 0.85rem; color: rgba(255,255,255,0.32);
  transition: color 0.2s;
}
.footer-col a:hover { color: rgba(255,255,255,0.75); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 0.78rem; color: rgba(255,255,255,0.22); }
.footer-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.footer-chip {
  font-size: 0.7rem; background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.25); border-radius: var(--radius-sm);
  padding: 3px 9px; font-family: 'DM Mono', monospace;
}

/* ══════════════════ ANIMATIONS ══════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-6px); }
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}
@keyframes fillBar {
  from { width: 0; }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.fade-up  { animation: fadeUp  0.65s ease both; }
.fade-in  { animation: fadeIn  0.5s  ease both; }
.d1 { animation-delay: 0.08s; }
.d2 { animation-delay: 0.18s; }
.d3 { animation-delay: 0.28s; }
.d4 { animation-delay: 0.40s; }
.d5 { animation-delay: 0.52s; }

/* ══════════════════ MOBILE NAV MENU ══════════════════ */
.nav-mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  padding: 16px 5% 24px;
  z-index: 199;
  flex-direction: column;
  gap: 4px;
  animation: fadeIn 0.2s ease;
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu ul { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.nav-mobile-menu ul a {
  display: block; padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.2s, background 0.2s;
}
.nav-mobile-menu ul a:hover,
.nav-mobile-menu ul a.active { color: var(--green); background: var(--green-pale); }
.nav-mobile-menu .mob-cta {
  margin-top: 12px;
  display: block; text-align: center;
  background: var(--green); color: white;
  border-radius: var(--radius); padding: 12px;
  font-size: 0.9rem; font-weight: 600;
  transition: background 0.2s;
}
.nav-mobile-menu .mob-cta:hover { background: var(--green-mid); }

/* Hamburger → X animation */
.nav-hamburger span { transition: all 0.3s ease; }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Prevent body scroll when menu open */
body.menu-open { overflow: hidden; }

/* ══════════════════ CONSTELLATION GRID ══════════════════ */
.constellation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.constellation-img {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--white);
  padding: 16px;
  width: 100%;
}
.constellation-img img {
  width: 100%;
  height: auto;
  display: block;
  min-height: 260px;
  object-fit: contain;
}

/* ══════════════════ RESPONSIVE ══════════════════ */
@media (max-width: 900px) {
  :root { --section-py: 60px; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .constellation-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  /* Show image ABOVE the text on mobile */
  .constellation-img {
    order: -1;
    width: 100%;
    max-width: 100%;
    padding: 20px;
  }
  .constellation-img img {
    min-height: 300px;
  }
}
@media (max-width: 600px) {
  :root { --section-py: 48px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .section { padding: var(--section-py) 4%; }
  .btn { padding: 11px 20px; font-size: 0.88rem; }
  .btn-lg { padding: 13px 24px; font-size: 0.93rem; }
  .section-title { font-size: clamp(1.6rem, 6vw, 2.2rem); }
  .constellation-img {
    padding: 12px;
  }
  .constellation-img img {
    min-height: 280px;
  }
}