/* getprover.de, shared by every page.

   Colours, radii and motion are the app's own (lib/core/theme). The site is
   one dark room: black lacquer, one lamp, steel type. Orange is the app's
   signal and stays on what the app itself lights; the site's own accent is
   tempered steel, the logo's fire gradient, used on edges and glyphs only. */

:root {
  --void: #000000;
  --cosmos: #0a0a0a;
  --nebula: #0f0f12;
  --stellar: #18181c;
  --lunar: #242429;
  --graphite: #2c2c2e;
  --text: #ffffff;
  --text-2: #aeaeb2;
  --text-3: #8e8e93;
  --asteroid: #7c7c82;
  --hairline-quiet: rgba(174, 174, 178, 0.07);
  --hairline: rgba(174, 174, 178, 0.12);
  --hairline-strong: rgba(174, 174, 178, 0.20);
  --hairline-control: rgba(174, 174, 178, 0.55);
  --core: #ff4500;
  --glow: #ff6b3d;
  --flare: #ffa500;
  --ember: #ff8c69;
  --straw: #f8dc86;
  --temper: #f08a3a;
  --copper: #c8502a;
  --lamp: 255, 235, 214;
  --warmth: 255, 180, 110;
  --nutrition: #22c55e;
  --nutrition-glow: #4ade80;
  --deload: #42a5f5;
  --deload-glow: #90caf9;
  --led-active: #00e676;
  --led-active-glow: #69f0ae;

  --steel: linear-gradient(180deg, #ffffff 0%, #f3f5f8 42%, #c7cdd5 76%, #959ca6 100%);
  --tempered: linear-gradient(200deg, var(--straw) 0%, var(--temper) 52%, var(--copper) 100%);
  --panel: linear-gradient(180deg, rgba(24, 24, 28, 0.72) 0%, rgba(12, 12, 14, 0.9) 46%, rgba(6, 6, 7, 0.96) 100%);

  --s-1: 4px;
  --s-2: 8px;
  --s-3: 16px;
  --s-4: 24px;
  --s-5: 32px;
  --s-6: 48px;
  --s-7: 64px;
  --s-8: 96px;
  --s-9: 128px;
  --s-10: 160px;

  --r-s: 8px;
  --r-m: 12px;
  --r-l: 14px;
  --r-xl: 16px;
  --r-xxl: 20px;
  --r-xxxl: 24px;
  --r-panel: 28px;

  --dur-fast: 150ms;
  --dur-normal: 250ms;
  --dur-slow: 400ms;
  --dur-deliberate: 650ms;
  --dur-stage: 1400ms;
  --ease-entering: cubic-bezier(0.215, 0.61, 0.355, 1);
  --ease-exiting: cubic-bezier(0.55, 0.055, 0.675, 0.19);
  --ease-standard: cubic-bezier(0.645, 0.045, 0.355, 1);
  --ease-glide: cubic-bezier(0.165, 0.84, 0.44, 1);

  --font: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wide: 118%;

  /* One type scale for every page. */
  --t-hero: clamp(42px, 6vw, 88px);
  --t-h1: clamp(36px, 4.4vw, 64px);
  --t-h2: clamp(32px, 3.9vw, 56px);
  --t-h3: clamp(21px, 1.7vw, 24px);
  --t-lede: clamp(17px, 1.35vw, 20px);
  --t-body: 16px;
  --t-small: 14px;
  --t-label: 11px;

  --wrap: 1200px;
  --gutter: max(var(--s-3), env(safe-area-inset-left));
  --gutter-right: max(var(--s-3), env(safe-area-inset-right));
  --topbar: 64px;
  color-scheme: dark;
}
@media (min-width: 600px) {
  :root { --gutter: max(var(--s-5), env(safe-area-inset-left)); --gutter-right: max(var(--s-5), env(safe-area-inset-right)); }
}
@media (min-width: 900px) {
  :root { --topbar: 72px; --gutter: max(var(--s-6), env(safe-area-inset-left)); --gutter-right: max(var(--s-6), env(safe-area-inset-right)); }
}

@view-transition { navigation: auto; }
::view-transition-old(root), ::view-transition-new(root) { animation-duration: var(--dur-normal); animation-timing-function: var(--ease-standard); }

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; background: var(--void); scroll-padding-top: calc(var(--topbar) + var(--s-4)); }
body {
  background: var(--void);
  color: var(--text);
  font: var(--t-body)/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, canvas, svg { display: block; max-width: 100%; }
img { height: auto; }
main { overflow-x: hidden; overflow-x: clip; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--ember); outline-offset: 4px; border-radius: 6px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip {
  position: fixed;
  top: var(--s-2);
  left: var(--s-2);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--s-3);
  border-radius: var(--r-m);
  background: var(--stellar);
  font-size: var(--t-small);
  text-decoration: none;
  transform: translateY(-160%);
}
.skip:focus-visible { transform: none; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter-right);
}

/* ---------------------------------------------------------------- type */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font: 600 var(--t-label)/1.4 var(--font);
  font-stretch: var(--wide);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-3);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--tempered);
}

.display {
  font-weight: 600;
  font-stretch: var(--wide);
  letter-spacing: -0.022em;
  line-height: 1.02;
  text-wrap: balance;
}
.display .line { display: block; }
.h-hero { font-size: var(--t-hero); letter-spacing: -0.03em; line-height: 0.98; }
.h-1 { font-size: var(--t-h1); }
.h-2 { font-size: var(--t-h2); }
.h-3 { font-size: var(--t-h3); font-weight: 600; font-stretch: 108%; letter-spacing: -0.01em; line-height: 1.25; }

/* Polished steel lit from above, as the store screenshots set the claim;
   tempered steel for the one phrase that carries the promise. */
.steel, .tempered {
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
  padding-bottom: 0.1em;
  margin-bottom: -0.1em;
}
.steel { background-image: var(--steel); }
.tempered { background-image: linear-gradient(180deg, #fbe7a8 0%, var(--straw) 18%, var(--temper) 58%, var(--copper) 100%); }

.lede {
  color: var(--text-2);
  font-size: var(--t-lede);
  line-height: 1.55;
  max-width: 32em;
  text-wrap: pretty;
}
.body-copy { color: var(--text-2); font-size: var(--t-body); line-height: 1.6; max-width: 34em; text-wrap: pretty; }
.fine { color: var(--text-3); font-size: 13px; line-height: 1.55; }
.figure { font-variant-numeric: tabular-nums; }

/* ------------------------------------------------------------- buttons */

/* The app's dark slab (paywall_action_button.dart): a body that catches the
   lamp along its upper lip, a shadow under it, white type and a tempered
   glyph. Never white. The secondary is the quieter slab without lip. */
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-3); }
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 var(--s-4);
  border-radius: var(--r-l);
  font: 600 16px/1.2 var(--font);
  letter-spacing: -0.005em;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-entering), box-shadow var(--dur-normal) var(--ease-entering), border-color var(--dur-normal) var(--ease-entering), background-color var(--dur-normal) var(--ease-entering), color var(--dur-normal) var(--ease-entering);
}
.btn-primary {
  border: 0.8px solid rgba(174, 174, 178, 0.18);
  background: linear-gradient(180deg, var(--lunar) 0%, var(--stellar) 100%);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.8), 0 24px 48px rgba(0, 0, 0, 0.5);
}
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
}
.btn-primary:hover { transform: translateY(-1px); border-color: rgba(174, 174, 178, 0.28); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.85), 0 28px 56px rgba(0, 0, 0, 0.55), 0 0 32px rgba(240, 138, 58, 0.08); }
.btn-primary:active { transform: scale(0.98); }
.btn-secondary {
  border: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(24, 24, 28, 0.4) 0%, rgba(15, 15, 18, 0.25) 100%);
  color: var(--text-2);
}
.btn-secondary:hover { color: var(--text); border-color: var(--hairline-strong); }
.btn-glyph { width: 18px; height: 18px; flex: none; }
.btn-glyph path { stroke: url(#tempered-stroke); }
.btn-small { min-height: 44px; padding: 0 var(--s-3); border-radius: var(--r-m); font-size: var(--t-small); }
.btn-small::before { left: 12px; right: 12px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  font-weight: 600;
  font-size: var(--t-small);
  color: var(--text);
  text-decoration: none;
}
.link-arrow svg { width: 15px; height: 15px; transition: transform var(--dur-normal) var(--ease-entering); }
.link-arrow svg path { stroke: url(#tempered-stroke); }
.link-arrow:hover svg { transform: translateX(3px); }

/* -------------------------------------------------------------- header */

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  padding-top: env(safe-area-inset-top);
  border-bottom: 1px solid transparent;
  view-transition-name: topbar;
  transition: background-color var(--dur-slow) var(--ease-standard), border-color var(--dur-slow) var(--ease-standard), -webkit-backdrop-filter var(--dur-slow) var(--ease-standard), backdrop-filter var(--dur-slow) var(--ease-standard);
}
.topbar.is-raised, .topbar.is-open {
  background: rgba(0, 0, 0, 0.74);
  -webkit-backdrop-filter: saturate(150%) blur(22px);
          backdrop-filter: saturate(150%) blur(22px);
  border-bottom-color: var(--hairline-quiet);
}
.topbar-row { display: flex; align-items: center; gap: var(--s-5); min-height: var(--topbar); }
.brand { display: inline-flex; align-items: center; gap: 4px; min-height: 44px; text-decoration: none; }
.brand-mark { width: 24px; height: auto; }
.brand-word { height: 14px; width: auto; }
.nav { display: flex; align-items: center; gap: var(--s-5); margin-left: auto; }
.nav a {
  position: relative;
  font-size: var(--t-small);
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  padding: 12px 0;
  transition: color var(--dur-fast) var(--ease-entering);
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }
.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  border-radius: 50%;
  background: var(--temper);
  box-shadow: 0 0 8px rgba(240, 138, 58, 0.7);
}
.topbar-actions { display: flex; align-items: center; gap: var(--s-2); }
.menu-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  border-radius: var(--r-m);
}
.menu-toggle span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.5px;
  border-radius: 1px;
  background: var(--text);
  transition: transform var(--dur-normal) var(--ease-standard);
}
.menu-toggle span:first-child { top: 17px; }
.menu-toggle span:last-child { top: 25px; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

.menu {
  position: fixed;
  inset: calc(var(--topbar) + env(safe-area-inset-top)) 0 0 0;
  z-index: 29;
  display: flex;
  flex-direction: column;
  padding: var(--s-5) var(--gutter-right) calc(var(--s-5) + env(safe-area-inset-bottom)) var(--gutter);
  background: rgba(0, 0, 0, 0.96);
  -webkit-backdrop-filter: blur(22px);
          backdrop-filter: blur(22px);
  overflow-y: auto;
}
.menu nav { display: grid; }
.menu nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline-quiet);
  font: 600 28px/1.1 var(--font);
  font-stretch: var(--wide);
  letter-spacing: -0.02em;
  text-decoration: none;
}
.menu nav a svg { width: 18px; height: 18px; color: var(--text-3); }
.menu nav a[aria-current="page"] { color: var(--text-2); }
.menu .actions { margin-top: auto; padding-top: var(--s-6); flex-direction: column; align-items: stretch; }
.menu .btn { width: 100%; }
@media (prefers-reduced-motion: no-preference) { .js .menu.is-open nav a { animation: rise var(--dur-deliberate) var(--ease-glide) both; animation-delay: calc(var(--i, 0) * 40ms); } }

@media (max-width: 899px) {
  .nav { display: none; }
  .topbar-actions { margin-left: auto; }
  .menu-toggle { display: grid; place-items: center; }
  html.menu-open { overflow: hidden; }
}
@media (min-width: 900px) {
  .menu { display: none !important; }
}

/* ------------------------------------------------------------ sections */

.section { position: relative; padding: var(--s-9) 0; }
.section-head { display: grid; gap: var(--s-4); justify-items: start; }
.section-head.is-centred { justify-items: center; text-align: center; }
.section-head.is-centred .lede { margin: 0 auto; }
.section-head .display { max-width: 15em; }
@media (max-width: 899px) { .section { padding: var(--s-8) 0; } }
@media (max-width: 599px) { .section { padding: var(--s-7) 0; } }

/* Things rise in once as they enter the view. Without scripts, or if the
   scripts never start, everything simply stands. */
@media (prefers-reduced-motion: no-preference) {
  .js:not(.no-live) .reveal { opacity: 0; transform: translateY(24px); }
  .js:not(.no-live) .reveal.is-in {
    opacity: 1;
    transform: none;
    transition: opacity var(--dur-deliberate) var(--ease-glide), transform var(--dur-deliberate) var(--ease-glide);
    transition-delay: calc(var(--i, 0) * 90ms);
  }
}
@keyframes rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* ------------------------------------------------------ page hero (sub) */

/* The opening sits right under the header on a phone; the wide screens
   give it air for the phone beside it. */
.page-hero { position: relative; padding: calc(var(--topbar) + env(safe-area-inset-top) + var(--s-5)) 0 var(--s-7); overflow: hidden; }
@media (min-width: 600px) { .page-hero { padding-top: calc(var(--topbar) + env(safe-area-inset-top) + var(--s-7)); } }
@media (min-width: 900px) { .page-hero { padding: calc(var(--topbar) + env(safe-area-inset-top) + var(--s-9)) 0 var(--s-8); } }
.page-hero::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -360px;
  width: 1200px;
  height: 900px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(var(--lamp), 0.075) 0%, rgba(var(--lamp), 0.03) 50%, rgba(var(--lamp), 0) 100%);
  pointer-events: none;
}
.page-hero-grid { position: relative; display: grid; gap: var(--s-7); align-items: center; }
.page-hero-copy { display: grid; gap: var(--s-4); justify-items: start; }
.page-hero-copy .lede { max-width: 30em; }
@media (min-width: 900px) {
  .page-hero-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: var(--s-8); }
  .page-hero-grid.is-text { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: no-preference) { .js:not(.no-live) .page-hero .lift { animation: rise var(--dur-deliberate) var(--ease-glide) both; animation-delay: calc(80ms + var(--i, 0) * 90ms); } }

/* In-page index for the longer pages. */
.subnav { position: sticky; top: calc(var(--topbar) + env(safe-area-inset-top)); z-index: 10; background: rgba(0, 0, 0, 0.8); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); border-bottom: 1px solid var(--hairline-quiet); }
.subnav ol { display: flex; gap: var(--s-5); list-style: none; overflow-x: auto; scrollbar-width: none; min-height: 52px; align-items: center; }
.subnav ol::-webkit-scrollbar { display: none; }
.subnav a { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; min-width: 44px; white-space: nowrap; font-size: var(--t-small); color: var(--text-3); text-decoration: none; transition: color var(--dur-fast) var(--ease-entering); }
.subnav a:hover, .subnav a.is-here { color: var(--text); }

/* ----------------------------------------------------- closing CTA band */

.closing { position: relative; padding: var(--s-9) 0 var(--s-10); text-align: center; overflow: hidden; }
.closing .wrap { position: relative; display: grid; justify-items: center; gap: var(--s-4); }
.forge { position: relative; width: min(300px, 64vw); margin-bottom: var(--s-3); }
.forge::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -60%;
  width: 260%;
  height: 210%;
  transform: translateX(-50%);
  background: radial-gradient(closest-side at 50% 52%, rgba(var(--lamp), 0.11) 0%, rgba(var(--warmth), 0.05) 45%, rgba(var(--lamp), 0) 100%);
  pointer-events: none;
}
.forge img { position: relative; width: 100%; -webkit-box-reflect: below 14px linear-gradient(transparent 62%, rgba(255, 255, 255, 0.2)); }
.forge-floor {
  position: absolute;
  left: -40%;
  right: -40%;
  bottom: -14px;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.07) 50%, transparent 100%);
}
.closing .lede { margin: 0 auto; }
.closing .actions { justify-content: center; margin-top: var(--s-2); }

/* -------------------------------------------------------------- footer */

.footer { border-top: 1px solid var(--hairline-quiet); padding: var(--s-7) 0 calc(var(--s-6) + env(safe-area-inset-bottom)); color: var(--text-3); font-size: var(--t-small); }
.footer-grid { display: grid; gap: var(--s-6); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.footer-brand { grid-column: 1 / -1; display: grid; gap: var(--s-2); align-content: start; }
.footer-brand p { color: var(--text-3); }
.footer nav { display: grid; align-content: start; }
.footer h2 { font: 600 var(--t-label)/1.4 var(--font); font-stretch: var(--wide); letter-spacing: 0.22em; text-transform: uppercase; color: var(--asteroid); margin-bottom: var(--s-2); }
.footer nav a { display: flex; align-items: center; min-height: 44px; color: var(--text-2); text-decoration: none; transition: color var(--dur-fast) var(--ease-entering); }
.footer nav a:hover { color: var(--text); }
.footer-fine { display: grid; gap: var(--s-1); margin-top: var(--s-7); padding-top: var(--s-4); border-top: 1px solid var(--hairline-quiet); }
@media (min-width: 900px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .footer-brand { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .btn, .topbar, .menu-toggle span, .link-arrow svg { transition: none; }
  .btn-primary:hover { transform: none; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}

/* Pages that open on words alone. */
.page-hero.is-centred .page-hero-copy { justify-items: center; text-align: center; }
.page-hero.is-centred .lede { margin: 0 auto; }
.page-hero.is-centred { padding-bottom: var(--s-6); }
.section.is-flush { padding-top: var(--s-3); }
.faq-wrap, .beta-wrap { max-width: 880px; }

/* On a phone the store a visitor can use is one full slab; the other is a
   quiet link under it. */
@media (max-width: 599px) {
  [data-store-actions] { flex-direction: column; align-items: stretch; gap: var(--s-1); width: 100%; max-width: 360px; }
  .closing [data-store-actions], .page-hero.is-centred [data-store-actions] { margin-left: auto; margin-right: auto; }
  [data-store-actions] .btn-primary { width: 100%; }
  [data-store-actions] .btn-secondary { min-height: 44px; border: 0; background: none; font-size: var(--t-small); color: var(--text-2); text-decoration: underline; text-decoration-color: var(--hairline-strong); text-underline-offset: 5px; }
}

/* The page for an address that does not exist. */
.lost-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0 var(--s-5); margin-top: var(--s-2); }
.page-hero.is-lost { padding-bottom: 0; }