/* ==========================================================================
   YOCTO 2026 — Shared shell: header, nav + dropdowns, mobile menu, footer,
   ambient layers, and the section-header system. Loaded on all redesign pages.
   ========================================================================== */

:root { --edge: clamp(22px, 5vw, 64px); --maxw: 1340px; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--edge); }

/* ---- Ambient layers ---- */
.bg-field {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(rgba(78,203,113,0.030) 1px, transparent 1px), linear-gradient(90deg, rgba(78,203,113,0.030) 1px, transparent 1px);
  background-size: 72px 72px; animation: grid-drift 28s linear infinite;
  -webkit-mask-image: radial-gradient(ellipse 130% 90% at 50% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(ellipse 130% 90% at 50% 0%, #000 0%, transparent 72%);
}
@keyframes grid-drift { to { background-position: 72px 72px; } }
.spotlight { position: fixed; inset: 0; z-index: 1; pointer-events: none; background: radial-gradient(400px circle at var(--mx,50%) var(--my,0%), rgba(78,203,113,0.06), transparent 70%); transition: background 120ms linear; }
.scroll-progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: linear-gradient(90deg, var(--brand-green), var(--brand-lime)); z-index: 200; box-shadow: 0 0 12px rgba(78,203,113,0.6); }
body > header, body > main, body > footer { position: relative; z-index: 2; }

/* ---- Shared components ---- */
.kicker { display: inline-flex; align-items: center; gap: 12px; font-family: var(--font-mono); font-size: 11px; color: var(--brand-green); letter-spacing: 0.22em; text-transform: uppercase; }
.kicker::before { content: ''; width: 9px; height: 9px; background: var(--brand-green); transform: rotate(45deg); flex-shrink: 0; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 15px 26px; border: 0; border-radius: 4px; cursor: pointer; font-family: var(--font-heading); font-weight: 700; font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; transition: all 200ms var(--ease); }
.btn-xl { padding: 19px 34px; font-size: 14px; }
.btn-primary { background: var(--brand-green); color: var(--ink); }
.btn-primary:hover { background: var(--brand-green-hover); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(78,203,113,0.28); }
.btn-outline { background: transparent; color: var(--fg1); border: 1px solid var(--border-accent-loud); }
.btn-outline:hover { background: var(--brand-green-muted); border-color: var(--brand-green); }
.btn .arrow { display: inline-block; transition: transform 200ms var(--ease); }
.btn:hover .arrow { transform: translateX(5px); }

/* ---- Section-header system ---- */
.sec { padding: clamp(64px, 9vw, 130px) 0; position: relative; border-top: 1px solid var(--border-subtle); }
.sec-head { position: relative; margin-bottom: clamp(40px, 6vw, 72px); }
.sec-head.center { text-align: center; }
.sec-head .row { display: grid; grid-template-columns: 1.35fr 1fr; gap: 64px; align-items: end; }
.sec-title { font-family: var(--font-heading); font-weight: 700; font-size: clamp(34px, 5.4vw, 60px); line-height: 0.98; letter-spacing: -0.022em; margin: 0; text-transform: uppercase; text-wrap: balance; }
.sec-title.p-title { font-size: clamp(34px, 5.8vw, 66px); max-width: 1040px; }
.sec-title .green { color: var(--brand-green); }
.sec-lead { font-family: var(--font-sans); font-size: 16px; line-height: 1.65; color: var(--fg2); margin: 0; }
.sec-lead strong { color: var(--fg1); font-weight: 600; }
.p-intro { margin: 26px 0 0; max-width: 720px; font-size: 16px; line-height: 1.65; color: var(--fg2); }
.p-intro strong { color: var(--fg1); font-weight: 600; }

/* ---- HEADER ---- */
header.site { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(0,4,1,0.62); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-whisper); transition: background 250ms var(--ease); }
header.site .nav-row { max-width: var(--maxw); margin: 0 auto; padding: 18px var(--edge); display: flex; align-items: center; justify-content: space-between; gap: 24px; transition: padding 250ms var(--ease); }
header.site.compressed { background: rgba(0,4,1,0.94); border-bottom-color: var(--border-subtle); }
header.site.compressed .nav-row { padding: 11px var(--edge); }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--font-heading); font-weight: 700; font-size: 19px; letter-spacing: 0.06em; color: var(--fg1); }
.brand .mark { width: 30px; height: 30px; flex: none; }
.brand .mark img { width: 100%; height: 100%; }
nav.primary { display: flex; gap: 2px; align-items: center; }
.nav-item { position: relative; }
.nav-item > a, .nav-item > button { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-heading); font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg2); background: transparent; border: 0; padding: 10px 16px; border-radius: 4px; cursor: pointer; transition: color 150ms; }
.nav-item > a:hover, .nav-item > button:hover, .nav-item:hover > button, .nav-item:focus-within > button { color: var(--brand-green); }
.nav-item .caret { width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg) translateY(-1px); transition: transform 220ms; }
.nav-item:hover .caret, .nav-item:focus-within .caret { transform: rotate(-135deg) translateY(-1px); }
.dropdown { position: absolute; top: calc(100% + 8px); left: 0; min-width: 264px; padding: 8px; background: rgba(9,28,14,0.97); backdrop-filter: blur(20px); border: 1px solid var(--border-accent); border-radius: 10px; box-shadow: 0 24px 50px rgba(0,0,0,0.5); opacity: 0; visibility: hidden; transform: translateY(-8px); transition: all 200ms var(--ease); }
.nav-item:hover .dropdown, .nav-item:focus-within .dropdown { opacity: 1; visibility: visible; transform: none; }
.dropdown a { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 6px; font-family: var(--font-sans); font-size: 13px; color: var(--fg2); transition: all 150ms; }
.dropdown a:hover { background: var(--brand-green-muted); color: var(--fg1); padding-left: 18px; }
.dropdown a .dot { width: 6px; height: 6px; background: var(--brand-green); border-radius: 1px; flex-shrink: 0; transform: rotate(45deg); }
.header-cta { display: flex; align-items: center; gap: 14px; }

/* Hamburger (mobile) */
.nav-toggle { display: none; width: 42px; height: 42px; flex-direction: column; justify-content: center; gap: 5px; padding: 0 9px; background: transparent; border: 1px solid var(--border-accent-loud); border-radius: 6px; }
.nav-toggle span { height: 2px; width: 100%; background: var(--fg1); transition: transform 250ms var(--ease), opacity 200ms; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu overlay */
.mobile-nav { position: fixed; inset: 0; z-index: 99; background: rgba(0,4,1,0.98); backdrop-filter: blur(8px); padding: 96px var(--edge) 40px; overflow-y: auto; }
.mobile-nav[hidden] { display: none; }
.mobile-nav nav { display: flex; flex-direction: column; gap: 4px; max-width: 520px; margin: 0 auto; }
.mobile-nav > nav > a { font-family: var(--font-heading); font-weight: 700; font-size: 22px; text-transform: uppercase; letter-spacing: 0.02em; color: var(--fg1); padding: 14px 0; border-bottom: 1px solid var(--border-subtle); }
.mobile-nav .m-group { padding: 14px 0; border-bottom: 1px solid var(--border-subtle); display: flex; flex-direction: column; gap: 2px; }
.mobile-nav .m-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--brand-green); margin-bottom: 6px; }
.mobile-nav .m-group a { font-family: var(--font-sans); font-size: 16px; color: var(--fg2); padding: 8px 0 8px 14px; }
.mobile-nav .btn { margin-top: 20px; }

/* ---- FOOTER ---- */
footer.site { background: var(--ink); border-top: 1px solid var(--brand-green); padding: 80px 0 36px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 56px; border-bottom: 1px solid var(--border-subtle); }
.footer-brand .mark-lg { font-family: var(--font-heading); font-weight: 700; font-size: 52px; line-height: 0.9; letter-spacing: 0.02em; color: var(--brand-green); }
.footer-brand p { margin-top: 16px; max-width: 320px; font-size: 13px; line-height: 1.6; color: var(--fg1); }
.footer-col h4 { margin: 0 0 16px; font-family: var(--font-heading); font-size: 12px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--fg-muted); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 13px; color: var(--fg2); transition: color 150ms; }
.footer-col a:hover { color: var(--brand-green); }
.footer-bottom { margin-top: 32px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 11px; color: var(--fg-muted); letter-spacing: 0.05em; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  nav.primary { display: none; }
  .nav-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .bg-field, .spotlight { display: none !important; }
  .header-cta .btn:not(.nav-toggle) { display: none; } /* CTA lives in the mobile menu */
  .sec-head .row { grid-template-columns: 1fr; gap: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 420px) {
  .footer-grid { grid-template-columns: 1fr; }
}