/* =========================================================
   ABT — Advanced Battery Technologies
   One stylesheet for the whole site. Sections:
   1. Tokens   2. Base   3. Components   4. Layout (header/footer/drawer)
   5. Pages: home, about, services, products (flip cards), reuse, contact
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  --spacing-1: 0.25rem; --spacing-2: 0.5rem; --spacing-3: 0.75rem; --spacing-4: 1rem;
  --spacing-6: 1.5rem; --spacing-8: 2rem; --spacing-12: 3rem; --spacing-16: 4rem; --spacing-20: 5rem;

  /* Brand */
  --brand-green: #00592e;
  --brand-charge: #66ab56;
  --brand-signal: #fa2b00;
  --deep: #06261a;
  --deep-2: #0b3324;
  --deep-foreground: #eef1ea;
  --deep-muted: #9fb3a6;
  --deep-border: rgba(238, 241, 234, 0.14);

  --background: #f4f2eb;
  --foreground: #0e1f16;
  --surface: #ebe8de;
  --card: #fbfaf6;
  --primary: #00592e;
  --primary-foreground: #f4f2eb;
  --secondary: #fa2b00;
  --secondary-foreground: #ffffff;
  --muted: #e3e0d5;
  --muted-foreground: #4f5c54;
  --error: #c42200;
  --border: rgba(14, 31, 22, 0.13);

  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Bricolage Grotesque', 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --shadow-md: 0 4px 14px rgba(6, 38, 26, 0.08);
  --shadow-lg: 0 18px 40px rgba(6, 38, 26, 0.14);

  --radius-sm: 3px; --radius: 5px; --radius-md: 7px; --radius-lg: 12px; --radius-full: 9999px;
  --fast: 140ms; --normal: 260ms; --slow: 600ms;

  --max-width: 1200px;
  --edge: clamp(16px, 5vw, 64px);
  --header-h: 72px;
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--foreground);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
img { max-width: 100%; display: block; }
a { color: var(--primary); }
h1, h2, h3, h4, h5 { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.icon { width: 1em; height: 1em; flex-shrink: 0; display: inline-block; vertical-align: middle; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.skip-link { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--primary); color: var(--primary-foreground); padding: 8px 14px; border-radius: var(--radius); text-decoration: none; }
.skip-link:focus { top: 8px; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--slow) ease, transform var(--slow) ease; }
.reveal.is-revealed { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* Shared type */
.display { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.035em; line-height: 1; color: var(--foreground); }
.h1-xl { font-size: clamp(2.5rem, 5.6vw, 4.6rem); line-height: 0.98; margin-top: var(--spacing-6); }
.h1-lg { font-size: clamp(2.4rem, 5vw, 4rem); margin-top: var(--spacing-4); }
.h2 { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.9rem, 3.6vw, 2.9rem); line-height: 1.04; letter-spacing: -0.03em; margin: var(--spacing-4) 0 0; color: var(--foreground); }
.lede { color: var(--muted-foreground); font-size: clamp(1.0625rem, 1.4vw, 1.1875rem); line-height: 1.6; max-width: 58ch; margin: var(--spacing-6) 0 0; }
.sub { color: var(--muted-foreground); font-size: 1.0625rem; line-height: 1.65; margin: var(--spacing-4) 0 0; max-width: 56ch; }
.accent { color: var(--brand-charge); }
.muted { color: var(--muted-foreground); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.head { max-width: 700px; display: flex; flex-direction: column; align-items: flex-start; }
.head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: var(--spacing-6); flex-wrap: wrap; }
.cta-row { display: flex; flex-wrap: wrap; gap: var(--spacing-3); margin-top: var(--spacing-8); }
.error-text { color: var(--error); font-size: 0.9375rem; margin: var(--spacing-4) 0 0; }

/* ---------- 3. Components ---------- */

/* Section: paper | surface | deep | brand. Dark tones re-map tokens locally. */
.section {
  position: relative;
  background-color: var(--section-bg);
  color: var(--foreground);
  --section-bg: var(--background);
  /* PATTERN SLOT — swap for ABT's pattern artwork later, e.g. url(/assets/img/pattern-cells.svg) */
  --section-pattern: radial-gradient(circle at 1px 1px, var(--pattern-dot) 1px, transparent 1.5px);
  --section-pattern-size: 22px 22px;
  --pattern-dot: rgba(0, 89, 46, 0.16);
  overflow: hidden;
  padding: clamp(3.5rem, 8vw, 6.5rem) 0;
}
.section.sm { padding: var(--spacing-12) 0; }
.section.lg { padding: clamp(4.5rem, 11vw, 8.5rem) 0; }
.section.patterned::before {
  content: ""; position: absolute; inset: 0;
  background-image: var(--section-pattern); background-size: var(--section-pattern-size);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.15) 85%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.15) 85%);
  pointer-events: none;
}
.section > .inner { position: relative; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--edge); }
.tone-surface { --section-bg: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.tone-deep, .tone-brand {
  --foreground: var(--deep-foreground);
  --muted-foreground: var(--deep-muted);
  --border: var(--deep-border);
  --card: rgba(238, 241, 234, 0.04);
  --primary: var(--brand-charge);
  --primary-foreground: var(--deep);
  --pattern-dot: rgba(102, 171, 86, 0.22);
}
.tone-deep { --section-bg: var(--deep); --background: var(--deep); }
.tone-brand { --section-bg: var(--brand-green); --background: var(--brand-green); --muted-foreground: #c9dccd; --pattern-dot: rgba(238,241,234,.16); }

/* Eyebrow */
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--primary); }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 1px; background: var(--brand-signal); }

/* Spec tag */
.tag { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; padding: 4px 8px; border-radius: var(--radius-sm); white-space: nowrap; border: 1px solid var(--border); color: var(--muted-foreground); }
.tag.solid { border-color: transparent; background: var(--primary); color: var(--primary-foreground); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-2);
  height: 2.75rem; padding: 0 var(--spacing-4); font-size: 0.9375rem;
  font-family: var(--font-base); font-weight: 600; letter-spacing: -0.005em;
  border-radius: var(--radius); border: 1px solid transparent; white-space: nowrap;
  text-decoration: none; cursor: pointer; background: transparent; color: var(--foreground);
  transition: background-color var(--fast) ease, border-color var(--fast) ease, color var(--fast) ease;
}
.btn .icon { width: 1.25rem; height: 1.25rem; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 2px var(--background), 0 0 0 4px var(--primary); }
.btn-sm { height: 2.25rem; padding: 0 var(--spacing-4); font-size: 0.875rem; }
.btn-sm .icon { width: 1rem; height: 1rem; }
.btn-lg { height: 3.25rem; padding: 0 var(--spacing-6); font-size: 1rem; border-radius: var(--radius-md); }
.btn-lg .icon { width: 1.375rem; height: 1.375rem; }
.btn-icon { width: 2.5rem; height: 2.5rem; padding: 0; border-radius: var(--radius-md); }
.btn-icon-sm { width: 1.75rem; height: 1.75rem; padding: 0; }
.btn-icon-sm .icon { width: 1rem; height: 1rem; }
.btn-primary { background: var(--primary); color: var(--primary-foreground); border-color: var(--primary); }
.btn-primary:hover { background: color-mix(in oklch, var(--primary) 88%, var(--primary-foreground)); }
.btn-secondary { background: var(--secondary); color: var(--secondary-foreground); border-color: var(--secondary); }
.btn-secondary:hover { background: color-mix(in oklch, var(--secondary) 88%, var(--secondary-foreground)); }
.btn-outline { border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: color-mix(in oklch, var(--primary) 12%, var(--background)); }
.btn-ghost:hover { background: color-mix(in oklch, var(--primary) 12%, var(--background)); }
.btn[disabled], .btn.is-disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }
.btn-block { width: 100%; }
.pill { border-radius: var(--radius-full); }
.spin { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Forms */
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label, .label { font-size: 0.875rem; font-weight: 600; color: var(--foreground); }
.input, .textarea, .select {
  width: 100%; min-height: 2.75rem; padding: 0.625rem 0.875rem;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--card);
  font-size: 1rem; color: var(--foreground); transition: border-color var(--fast) ease, box-shadow var(--fast) ease;
}
.textarea { resize: vertical; min-height: 7rem; line-height: 1.5; }
.select { appearance: none; -webkit-appearance: none; padding-right: 2.5rem; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234f5c54' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.875rem center; }
.input:focus, .textarea:focus, .select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 89, 46, 0.2); }
.field.has-error .input, .field.has-error .textarea { border-color: var(--error); }
.field-error { color: var(--error); font-size: 0.8125rem; min-height: 0; }
.field-error:empty { display: none; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-4); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; } /* honeypot */
@media (max-width: 520px) { .form-row { grid-template-columns: 1fr; } }

/* Skeleton */
.skeleton { background: linear-gradient(90deg, var(--muted) 0%, color-mix(in srgb, var(--muted) 55%, var(--card)) 50%, var(--muted) 100%); background-size: 200% 100%; animation: shimmer 1.4s ease infinite; border-radius: var(--radius-md); }
@keyframes shimmer { to { background-position: -200% 0; } }

/* Product card */
.pcard { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; transition: border-color var(--normal) ease, transform var(--normal) ease, box-shadow var(--normal) ease; }
.pcard:hover { border-color: color-mix(in srgb, var(--brand-green) 45%, transparent); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.pcard-img { position: relative; display: block; background: #fff; aspect-ratio: 4 / 3; border-bottom: 1px solid var(--border); }
.pcard-img img { width: 100%; height: 100%; object-fit: contain; padding: 12px; }
.pcard-img .tag { position: absolute; left: 12px; top: 12px; }
.pcard-body { display: flex; flex-direction: column; gap: 4px; padding: var(--spacing-4); flex: 1; }
.pcard-code { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.06em; color: var(--muted-foreground); }
.pcard-name { font-family: var(--font-display); font-weight: 700; font-size: 1.3125rem; letter-spacing: -0.015em; color: var(--foreground); text-decoration: none; line-height: 1.2; }
.pcard-name:hover { color: var(--primary); }
.pcard-tagline { color: var(--muted-foreground); font-size: 0.9rem; line-height: 1.45; margin: 2px 0 0; }
.pcard-foot { display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-3); margin-top: auto; padding-top: var(--spacing-4); }
.price { font-family: var(--font-mono); font-weight: 600; font-size: 1.0625rem; font-variant-numeric: tabular-nums; }
.img-fallback { width: 100%; height: 100%; display: grid; place-items: center; color: var(--brand-green); opacity: 0.35; }
.img-fallback .icon { width: 30%; height: 30%; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--spacing-6); }

/* Accordion (native <details>) */
.faq { border-top: 1px solid var(--border); }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-4); padding: var(--spacing-4) 0; font-family: var(--font-display); font-size: 1.125rem; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .icon { width: 20px; height: 20px; color: var(--primary); transition: transform var(--normal) ease; }
.faq details[open] summary .icon { transform: rotate(180deg); }
.faq details p { margin: 0 0 var(--spacing-4); color: var(--muted-foreground); line-height: 1.7; }

/* Range slider */
.range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 3px; background: linear-gradient(to right, var(--brand-charge) var(--fill, 20%), var(--border) var(--fill, 20%)); cursor: pointer; }
.range::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--deep-foreground); border: 3px solid var(--brand-charge); }
.range::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: var(--deep-foreground); border: 3px solid var(--brand-charge); }

/* Toast */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; z-index: 90; background: var(--deep); color: var(--deep-foreground); padding: 12px 18px; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); font-size: 0.9375rem; transition: all var(--normal) ease; pointer-events: none; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 4. Layout ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--background) 88%, transparent);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent; transition: border-color var(--normal) ease;
}
.site-header.scrolled { border-bottom-color: var(--border); }
.header-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--edge); height: var(--header-h); display: flex; align-items: center; gap: var(--spacing-6); }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--brand-green); text-decoration: none; }
.logo-mark { width: 30px; height: 30px; flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-word { font-family: var(--font-display); font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; color: var(--foreground); }
.logo-sub { font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted-foreground); margin-top: 4px; }
.logo.inverted { color: var(--deep-foreground); }
.logo.inverted .logo-word { color: var(--deep-foreground); }
.logo.inverted .logo-sub { color: var(--deep-muted); }
.logo-img { height: 40px; width: auto; display: block; }
.nav { display: flex; gap: var(--spacing-1); margin: 0 auto; }
.nav a { position: relative; padding: 8px 10px; white-space: nowrap; font-size: 0.9375rem; font-weight: 500; color: var(--muted-foreground); text-decoration: none; border-radius: var(--radius); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--foreground); }
.nav a[aria-current="page"]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px; background: var(--brand-signal); }
.header-actions { display: flex; align-items: center; gap: var(--spacing-2); }
.tel { display: inline-flex; white-space: nowrap; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 0.8125rem; color: var(--foreground); text-decoration: none; padding: 0 8px; }
.tel .icon { color: var(--primary); width: 16px; height: 16px; }
.menu-btn { display: none; }
.menu-btn .icon { width: 24px; height: 24px; }
@media (max-width: 1320px) { .tel span { display: none; } }
@media (max-width: 1080px) { .nav a { padding: 8px 7px; font-size: 0.875rem; } }
@media (max-width: 1000px) {
  .nav, .header-cta, .tel { display: none; }
  .menu-btn { display: inline-flex; }
  .header-actions { margin-left: auto; }
}

/* Slide-over panel (mobile menu) */
.overlay { position: fixed; inset: 0; z-index: 60; background: rgba(6, 38, 26, 0.45); opacity: 0; pointer-events: none; transition: opacity var(--normal) ease; }
.overlay.open { opacity: 1; pointer-events: auto; }
.panel { position: fixed; top: 0; right: 0; bottom: 0; z-index: 70; width: min(420px, 100vw); background: var(--background); box-shadow: var(--shadow-lg); transform: translateX(100%); transition: transform var(--normal) cubic-bezier(.2,.7,.2,1); display: flex; flex-direction: column; visibility: hidden; }
.panel.open { transform: none; visibility: visible; }
.panel-close { position: absolute; top: 16px; right: 16px; }
.panel-close .icon { width: 20px; height: 20px; }
.mobile-menu { width: min(360px, 100vw); padding: var(--spacing-8) var(--spacing-6); gap: var(--spacing-8); }
.mobile-nav { display: flex; flex-direction: column; }
.mobile-nav a { font-family: var(--font-display); font-size: 1.625rem; font-weight: 600; padding: 10px 0; color: var(--foreground); text-decoration: none; border-bottom: 1px solid var(--border); }
.mobile-nav a[aria-current="page"] { color: var(--primary); }
.mobile-contact { display: flex; flex-direction: column; gap: var(--spacing-3); margin-top: auto; }

/* Footer */
.site-footer { background: var(--deep); color: var(--deep-foreground); padding: var(--spacing-16) 0 var(--spacing-8); }
.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--edge); display: grid; grid-template-columns: 1.6fr 1fr 1.3fr 1.2fr; gap: var(--spacing-8); }
.footer-brand p { color: var(--deep-muted); margin: var(--spacing-4) 0 0; max-width: 34ch; font-size: 0.9375rem; line-height: 1.6; }
.footer-head { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--brand-charge); margin: 0 0 var(--spacing-4); }
.footer-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-list a { color: var(--deep-foreground); text-decoration: none; font-size: 0.9375rem; display: inline-flex; align-items: center; gap: 8px; opacity: 0.88; }
.footer-list a:hover { opacity: 1; color: var(--brand-charge); }
.footer-list .icon { width: 14px; height: 14px; }
.address { display: flex; gap: 8px; font-size: 0.9375rem; line-height: 1.6; margin: 0; }
.address .icon { width: 14px; height: 14px; margin-top: 5px; color: var(--brand-charge); }
.hours { color: var(--deep-muted); font-size: 0.875rem; margin: var(--spacing-3) 0 0 22px; }
.footer-bottom { max-width: var(--max-width); margin: var(--spacing-12) auto 0; padding: var(--spacing-6) var(--edge) 0; border-top: 1px solid var(--deep-border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--spacing-3); font-size: 0.8125rem; color: var(--deep-muted); }
@media (max-width: 860px) { .footer-inner { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 480px) { .footer-inner { grid-template-columns: 1fr; } }

/* ---------- 5. Pages ---------- */

/* Home */
.hero-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero-copy { display: flex; flex-direction: column; align-items: flex-start; }
.hero-tags { display: flex; flex-wrap: wrap; gap: var(--spacing-2); margin-top: var(--spacing-8); }
.hero-art { max-width: 520px; width: 100%; justify-self: end; animation: floatIn 900ms cubic-bezier(.2,.7,.2,1) both; }
@keyframes floatIn { from { opacity: 0; transform: translateY(24px) rotate(-1deg); } to { opacity: 1; transform: none; } }
.pack-svg { width: 100%; height: auto; display: block; filter: drop-shadow(0 30px 50px rgba(0,0,0,.35)); }
.pack-svg .mono-t { font-family: var(--font-mono); font-size: 12px; letter-spacing: 1px; }
.pack-svg .mono-dark { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.5px; fill: #0e1f16; font-weight: 600; }
.pack-svg .mono-small { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.5px; fill: #4f5c54; }
.pack-svg .cell { fill: #123f2c; stroke: rgba(238,241,234,.12); stroke-width: 1; animation: charge 4.8s ease-in-out infinite; }
.pack-svg .glint { fill: rgba(238,241,234,.12); }
.pack-svg .trace { stroke: #66ab56; stroke-width: 1.5; stroke-dasharray: 6 8; animation: flow 1.6s linear infinite; opacity: 0.7; }
.pack-svg .led { fill: #66ab56; animation: blink 2.4s ease-in-out infinite; }
@keyframes charge { 0%, 100% { fill: #123f2c; } 35%, 60% { fill: #3f8a3a; } }
@keyframes flow { to { stroke-dashoffset: -28; } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.ticker { background: var(--brand-green); color: var(--deep-foreground); overflow: hidden; border-top: 1px solid rgba(255,255,255,.08); }
.ticker-track { display: flex; width: max-content; animation: marquee 38s linear infinite; }
.ticker-item { display: inline-flex; align-items: center; gap: 12px; padding: 16px 28px; font-family: var(--font-mono); font-size: 0.8125rem; letter-spacing: 0.04em; white-space: nowrap; }
.ticker-dot { width: 7px; height: 7px; background: var(--brand-signal); border-radius: 1px; }
@keyframes marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .ticker-track, .hero-art, .pack-svg .cell, .pack-svg .trace, .pack-svg .led { animation: none; }
  .pack-svg .cell { fill: #2f6f33; }
}

.use-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; margin-top: var(--spacing-12); }
.use-card { position: relative; background: var(--background); padding: var(--spacing-8) var(--spacing-6); text-decoration: none; color: var(--foreground); transition: background var(--normal) ease; }
.use-card:hover { background: var(--card); }
.use-card h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; letter-spacing: -0.015em; margin: var(--spacing-4) 0 6px; }
.use-card p { color: var(--muted-foreground); margin: 0; font-size: 0.9375rem; line-height: 1.5; max-width: 30ch; }
.use-icon { width: 28px; height: 28px; color: var(--brand-green); stroke-width: 1.5; }
.use-arrow { position: absolute; top: var(--spacing-8); right: var(--spacing-6); width: 18px; height: 18px; color: var(--brand-signal); opacity: 0; transform: translateX(-6px); transition: all var(--normal) ease; }
.use-card:hover .use-arrow { opacity: 1; transform: none; }

.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.stats { display: flex; flex-direction: column; }
.stat { display: flex; flex-direction: column; gap: 6px; padding: var(--spacing-6) 0; border-top: 1px solid var(--border); }
.stat:last-child { border-bottom: 1px solid var(--border); }
.stat-num { font-family: var(--font-display); font-weight: 800; font-size: clamp(3rem, 6vw, 4.5rem); line-height: 0.9; letter-spacing: -0.04em; color: var(--brand-green); }
.stat-unit { font-family: var(--font-mono); font-size: 0.32em; font-weight: 500; letter-spacing: 0; margin-left: 6px; color: var(--brand-signal); }
.stat-label { color: var(--muted-foreground); font-size: 0.9375rem; max-width: 40ch; }
.home-products { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-6); margin-top: var(--spacing-12); }
.home-products .skeleton { height: 420px; }

.pillars3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-6); margin-top: var(--spacing-12); }
.pillar { border: 1px solid var(--border); border-radius: var(--radius-md); padding: var(--spacing-8) var(--spacing-6); background: var(--card); }
.pillar-top { display: flex; justify-content: space-between; align-items: center; }
.pillar-icon { width: 28px; height: 28px; color: var(--brand-charge); stroke-width: 1.5; }
.pillar h3 { font-family: var(--font-display); font-size: 1.375rem; font-weight: 700; margin: var(--spacing-6) 0 var(--spacing-2); color: var(--foreground); }
.pillar p { color: var(--muted-foreground); margin: 0; line-height: 1.6; font-size: 0.9375rem; }

.cta-band { display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-8); flex-wrap: wrap; }
.cta-band .cta-row { margin-top: 0; }
.cta-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.5rem, 2.8vw, 2.1rem); letter-spacing: -0.02em; line-height: 1.1; margin: 0; max-width: 24ch; color: var(--foreground); }
.cta-sub { color: var(--muted-foreground); margin: var(--spacing-3) 0 0; }

@media (max-width: 900px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .hero-art { justify-self: center; max-width: 420px; }
  .use-grid, .home-products, .pillars3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) { .use-grid, .home-products, .pillars3 { grid-template-columns: 1fr; } }

/* About */
.about-hero { max-width: 900px; }
.problem { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 5rem); }
.problem-body p { font-size: 1.0625rem; line-height: 1.7; color: var(--muted-foreground); margin: 0 0 var(--spacing-4); }
.problem-body .strong { color: var(--foreground); font-weight: 600; border-left: 3px solid var(--brand-signal); padding-left: var(--spacing-4); }
.mission { max-width: 980px; }
.mission-text { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.6rem, 3.2vw, 2.5rem); line-height: 1.2; letter-spacing: -0.02em; margin: var(--spacing-6) 0 0; color: var(--foreground); }
.mission-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-6); margin-top: var(--spacing-12); border-top: 1px solid var(--border); padding-top: var(--spacing-6); }
.mission-stats div { display: flex; flex-direction: column; gap: 4px; color: var(--muted-foreground); font-size: 0.9375rem; }
.mission-stats .num { font-family: var(--font-display); font-weight: 800; font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.03em; color: var(--foreground); }
.pillars4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-4); margin-top: var(--spacing-12); }
.pillar4 { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: var(--spacing-6); display: flex; flex-direction: column; }
.pillar4 .pillar-top .n { font-family: var(--font-mono); font-size: 0.75rem; color: var(--brand-signal); }
.pillar4 .icon { width: 26px; height: 26px; color: var(--brand-green); stroke-width: 1.5; }
.pillar4 h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; margin: var(--spacing-8) 0 var(--spacing-2); letter-spacing: -0.015em; }
.pillar4 p { color: var(--muted-foreground); font-size: 0.9375rem; line-height: 1.6; margin: 0; }
.process { list-style: none; padding: 0; margin: var(--spacing-12) 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.process li { background: var(--deep); padding: var(--spacing-6); }
.process li:last-child { background: color-mix(in srgb, var(--brand-green) 45%, var(--deep)); }
.process-head { display: flex; justify-content: space-between; align-items: center; }
.process-index { font-family: var(--font-display); font-weight: 800; font-size: 2.25rem; letter-spacing: -0.04em; color: var(--brand-charge); }
.process h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; margin: var(--spacing-4) 0 var(--spacing-2); color: var(--foreground); }
.process p { color: var(--muted-foreground); margin: 0; font-size: 0.9375rem; line-height: 1.6; }
.loop-note { display: flex; align-items: center; gap: 8px; margin: var(--spacing-4) 0 0; font-family: var(--font-mono); font-size: 0.8125rem; color: var(--brand-charge); }
.team { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-6); margin-top: var(--spacing-12); }
@media (max-width: 1200px) { .team { grid-template-columns: 1fr 1fr; } }
.member { display: flex; flex-direction: column; gap: var(--spacing-4); padding: var(--spacing-6); border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); }
.avatar { width: 64px; height: 64px; border-radius: var(--radius-md); background: var(--brand-green); color: var(--deep-foreground); display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 1.375rem; }
.avatar .icon { width: 22px; height: 22px; }
.member.workshop .avatar { background: var(--brand-signal); color: #fff; }
.member h3 { font-family: var(--font-display); font-size: 1.375rem; font-weight: 700; letter-spacing: -0.015em; }
.member .role { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--primary); }
.member p { color: var(--muted-foreground); font-size: 0.9375rem; line-height: 1.6; margin: var(--spacing-3) 0 0; }
@media (max-width: 960px) { .pillars4, .process, .team { grid-template-columns: 1fr 1fr; } .problem { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .pillars4, .process, .team, .mission-stats { grid-template-columns: 1fr; } }

/* Services */
.services { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-6); }
.service { display: flex; flex-direction: column; align-items: flex-start; padding: clamp(1.5rem, 3vw, 2.5rem); border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--card); }
.service-top { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.service-top .icon { width: 30px; height: 30px; color: var(--brand-green); stroke-width: 1.5; }
.service h2 { font-family: var(--font-display); font-weight: 700; font-size: 2rem; letter-spacing: -0.025em; margin: var(--spacing-8) 0 0; }
.service .service-lede { font-size: 1.125rem; margin: var(--spacing-2) 0 0; }
.service .body { color: var(--muted-foreground); line-height: 1.7; margin: var(--spacing-4) 0 0; }
.checks { list-style: none; margin: var(--spacing-6) 0 var(--spacing-8); padding: 0; display: flex; flex-direction: column; gap: 10px; }
.checks li { display: flex; gap: 10px; align-items: flex-start; font-size: 0.9375rem; }
.checks .icon { width: 18px; height: 18px; color: var(--brand-charge); margin-top: 2px; }
.service .btn { margin-top: auto; }
.steps { list-style: none; margin: var(--spacing-12) 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--spacing-4); }
.step { padding-top: var(--spacing-6); border-top: 2px solid var(--brand-green); }
.step:first-child { border-top-color: var(--brand-signal); }
.step .n { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted-foreground); }
.step h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; margin: var(--spacing-2) 0; letter-spacing: -0.01em; }
.step p { color: var(--muted-foreground); font-size: 0.9rem; line-height: 1.6; margin: 0; }
.faq-wrap { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, 1fr); row-gap: var(--spacing-8); } }
@media (max-width: 860px) { .services, .faq-wrap { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* Products page */
.perks { list-style: none; margin: var(--spacing-12) 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.perks li { background: var(--deep); padding: var(--spacing-4); display: flex; gap: 10px; align-items: center; font-size: 0.875rem; color: var(--muted-foreground); }
.perks strong { color: var(--foreground); font-weight: 600; }
.perks .icon { width: 20px; height: 20px; color: var(--brand-charge); }
.filters { display: flex; flex-wrap: wrap; gap: var(--spacing-2); padding: var(--spacing-3) 0; }
.group { margin-top: var(--spacing-12); }
.group-head { display: flex; align-items: baseline; gap: var(--spacing-4); flex-wrap: wrap; padding-bottom: var(--spacing-4); border-bottom: 1px solid var(--border); margin-bottom: var(--spacing-6); }
.group-head h2 { font-family: var(--font-display); font-weight: 700; font-size: 1.75rem; letter-spacing: -0.02em; }
.group-head p { margin: 0; color: var(--muted-foreground); font-family: var(--font-mono); font-size: 0.8125rem; }
.help { margin-top: var(--spacing-16); padding: var(--spacing-8); border-radius: var(--radius-md); background: var(--surface); border: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-6); flex-wrap: wrap; }
.help h3 { font-family: var(--font-display); font-size: 1.5rem; }
.help p { margin: 6px 0 0; color: var(--muted-foreground); }
.help-actions { display: flex; gap: var(--spacing-3); flex-wrap: wrap; }
@media (max-width: 900px) { .perks { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .perks { grid-template-columns: 1fr; } }

/* Backup-time estimator */
.specs { margin: 0; width: 100%; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; background: var(--card); min-width: min(420px, 100%); }
.spec-row { display: grid; grid-template-columns: 1fr 1.2fr; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.spec-row:last-child { border-bottom: none; }
.spec-row dt { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted-foreground); align-self: center; }
.spec-row dd { margin: 0; font-weight: 500; }
.runtime { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: var(--spacing-12); align-items: center; }
.runtime-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.8rem, 3vw, 2.4rem); letter-spacing: -0.025em; margin: var(--spacing-3) 0 0; }
.runtime-note { color: var(--muted-foreground); max-width: 56ch; margin: var(--spacing-3) 0 0; font-size: 0.9375rem; line-height: 1.6; }
.presets { display: flex; flex-wrap: wrap; gap: var(--spacing-2); margin-top: var(--spacing-6); }
.slider-row { display: flex; align-items: center; gap: var(--spacing-4); margin-top: var(--spacing-6); max-width: 520px; }
.amps { font-family: var(--font-mono); min-width: 56px; text-align: right; }
.readout { display: flex; flex-direction: column; align-items: flex-start; padding: var(--spacing-8); border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--card); }
.readout .icon { color: var(--brand-charge); width: 28px; height: 28px; }
.hours-num { font-family: var(--font-display); font-weight: 800; font-size: clamp(4rem, 8vw, 6rem); line-height: 1; letter-spacing: -0.05em; color: var(--brand-charge); margin-top: var(--spacing-3); font-variant-numeric: tabular-nums; }
.hours-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted-foreground); margin-top: var(--spacing-3); }
@media (max-width: 860px) { .pd-layout, .runtime { grid-template-columns: 1fr; } .pd-image { position: static; aspect-ratio: 4 / 3; } }

/* Contact */
.contact-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.channels { display: flex; flex-direction: column; }
.channel { display: flex; gap: var(--spacing-4); align-items: flex-start; padding: var(--spacing-4) 0; border-bottom: 1px solid var(--border); color: var(--foreground); text-decoration: none; }
a.channel:hover strong { color: var(--primary); }
.channel > .icon { width: 22px; height: 22px; color: var(--brand-green); margin-top: 2px; }
.channel span { display: flex; flex-direction: column; gap: 2px; color: var(--muted-foreground); }
.channel strong { color: var(--foreground); font-weight: 600; }
.map { margin-top: var(--spacing-6); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border); aspect-ratio: 4 / 3; }
.map iframe { width: 100%; height: 100%; border: 0; display: block; }
.form-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(1.5rem, 3vw, 2.5rem); }
.form-stack { display: flex; flex-direction: column; gap: var(--spacing-4); }
.form-title { font-family: var(--font-display); font-size: 1.75rem; letter-spacing: -0.02em; margin: 0 0 var(--spacing-2); }
.sent { display: flex; flex-direction: column; gap: var(--spacing-3); align-items: flex-start; padding: var(--spacing-8) 0; }
.sent h2 { font-family: var(--font-display); font-size: 2rem; }
.sent p { color: var(--muted-foreground); margin: 0; line-height: 1.6; }
.sent .icon { width: 44px; height: 44px; color: var(--brand-green); }
@media (max-width: 900px) { .contact-layout { grid-template-columns: 1fr; } }

/* 404 */
.nf { max-width: 640px; }
.contact-layout > *, .pd-layout > *, .split > * { min-width: 0; }

/* ---------- 6. Product flip cards (products page + home) ----------
   Both faces sit in the same grid cell, so the card is as tall as its taller face.
   Desktop: flips on hover or keyboard focus. Touch: app.js toggles .is-flipped on tap.
   Reduced motion: cross-fades instead of rotating. */
.flip { perspective: 1400px; outline: none; border-radius: var(--radius-md); cursor: pointer; height: 100%; }
.flip:focus-visible { box-shadow: 0 0 0 2px var(--background), 0 0 0 4px var(--brand-green); }
.flip-inner { display: grid; height: 100%; transform-style: preserve-3d; transition: transform 700ms cubic-bezier(.2,.7,.2,1); }
.flip-face { grid-area: 1 / 1; display: flex; flex-direction: column; min-width: 0; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; -webkit-backface-visibility: hidden; backface-visibility: hidden; }
.flip-front { background: var(--card); transition: box-shadow var(--normal) ease, border-color var(--normal) ease; }
.flip-front .pcard-name { margin: 0; }
.flip-back { transform: rotateY(180deg); background: var(--deep); color: var(--deep-foreground); border-color: transparent; padding: var(--spacing-6); gap: var(--spacing-4);
  background-image: radial-gradient(circle at 1px 1px, rgba(102,171,86,.18) 1px, transparent 1.5px); background-size: 22px 22px; }
.flip-hint { display: inline-flex; align-items: center; gap: 6px; margin-top: auto; padding-top: var(--spacing-4); font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--primary); }
.flip-hint .icon { width: 14px; height: 14px; }
.hint-touch { display: none; }
@media (hover: none) { .hint-hover { display: none; } .hint-touch { display: inline; } }

.flip-back-head { display: flex; flex-direction: column; gap: 2px; padding-bottom: var(--spacing-3); border-bottom: 1px solid var(--deep-border); }
.flip-back-head .pcard-code { color: var(--deep-muted); }
.flip-back-name { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; letter-spacing: -0.015em; line-height: 1.2; }
.flip-desc { margin: 0; font-size: 0.875rem; line-height: 1.55; color: var(--deep-muted); }
.flip-specs { margin: 0; display: flex; flex-direction: column; }
.flip-spec { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--spacing-3); padding: 7px 0; border-bottom: 1px dashed var(--deep-border); }
.flip-spec:last-child { border-bottom: 0; }
.flip-spec dt { font-family: var(--font-mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--deep-muted); align-self: center; }
.flip-spec dd { margin: 0; font-size: 0.875rem; font-weight: 600; }
.flip-best { list-style: none; margin: auto 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.flip-best li { padding: 4px 10px; border-radius: var(--radius-full); background: rgba(102,171,86,.18); color: var(--deep-foreground); font-size: 0.75rem; }

.flip.is-flipped .flip-inner { transform: rotateY(180deg); }
@media (hover: hover) {
  .flip:hover .flip-inner, .flip:focus-visible .flip-inner { transform: rotateY(180deg); }
}
@media (prefers-reduced-motion: reduce) {
  .flip-inner { transform: none !important; transition: none; }
  .flip-face { position: relative; }
  .flip-back { transform: none; opacity: 0; z-index: 1; transition: opacity 200ms ease; }
  .flip.is-flipped .flip-back { opacity: 1; }
  @media (hover: hover) { .flip:hover .flip-back, .flip:focus-visible .flip-back { opacity: 1; } }
}
.product-grid > .flip, .home-products > .flip { min-width: 0; }
.group[hidden] { display: none; }

/* Estimator pack picker */
.runtime-pick { max-width: 360px; margin-top: var(--spacing-6); }
.tone-deep .select { background-color: rgba(238,241,234,.06); color: var(--deep-foreground); }
.tone-deep .select option { color: #0e1f16; }
.tone-deep .presets .btn-outline { color: var(--deep-foreground); border-color: var(--deep-border); }