/* ==========================================================================
   Ledgerfolio Showcase
   Midnight ink, ledger gold, soft aurora. One set of tokens drives the dark
   and light themes, the colour-vision modes, high contrast and text size.
   ========================================================================== */

/* ---------- 1. Tokens ---------------------------------------------------- */

:root {
  color-scheme: dark;
  --bg: #070910;
  --bg-2: #0b0f1a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --surface-solid: #0f1422;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.2);
  --text: #f4f0e7;
  --text-2: #b9bdcc;
  --muted: #8389a2;

  --accent: #e2b867;
  --accent-2: #8aa4ff;
  --accent-3: #62d6c3;
  --on-accent: #171003;

  /* Status colours are marks only. Text always uses the ink tokens, and every
     status also has an icon and a label, so colour never carries meaning alone. */
  --good: #4ad6a0;
  --bad: #ff7a7a;
  --warn: #f4bf5f;

  --glow: 0.5;
  --shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.85);
  --radius: 22px;
  --radius-sm: 12px;
  --blur: 18px;
  --scale: 1;

  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-body: "Manrope", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f3ec;
  --bg-2: #efeadf;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-2: rgba(255, 255, 255, 0.92);
  --surface-solid: #ffffff;
  --line: rgba(22, 26, 42, 0.1);
  --line-strong: rgba(22, 26, 42, 0.24);
  --text: #141826;
  --text-2: #454b61;
  --muted: #5f657b;

  --accent: #946712;
  --accent-2: #3b55d9;
  --accent-3: #0f8f7d;
  --on-accent: #ffffff;

  --good: #0d8a63;
  --bad: #d63a4a;
  --warn: #d19a00;

  --glow: 0.28;
  --shadow: 0 40px 80px -45px rgba(40, 34, 12, 0.45);
}

/* ---------- Colour-vision modes (Showcase accessibility panel) ----------
   Checked with a colour-vision simulation: the good/bad pair in each mode
   stays clearly apart for the audience that mode is for. */

/* Red-green safe (protanopia, deuteranopia): blue against orange. */
:root[data-vision="redgreen"] {
  --accent: #ffd24a; --accent-2: #5aa9ff; --accent-3: #c9d6ff; --on-accent: #171003;
  --good: #56b4e9; --bad: #e8590c; --warn: #f0e442;
}
:root[data-theme="light"][data-vision="redgreen"] {
  --accent: #8a6a00; --accent-2: #0b5fb8; --accent-3: #1d3a6e; --on-accent: #ffffff;
  --good: #0072b2; --bad: #a33a00; --warn: #d9a400;
}

/* Blue-yellow safe (tritanopia): teal against red. */
:root[data-vision="blueyellow"] {
  --accent: #ff7d95; --accent-2: #3ad0c8; --accent-3: #ffc2b8; --on-accent: #1d0509;
  --good: #22c7bd; --bad: #ff5c7a; --warn: #c9a0ff;
}
:root[data-theme="light"][data-vision="blueyellow"] {
  --accent: #c2255c; --accent-2: #0b7f7a; --accent-3: #8f4a3d; --on-accent: #ffffff;
  --good: #0b7f7a; --bad: #c1272d; --warn: #6a4a9c;
}

/* Monochrome (achromatopsia, or anyone who prefers no colour): meaning comes
   from icons, labels, weight and border style only. */
:root[data-vision="mono"] {
  --accent: #f2f2f2; --accent-2: #bdbdbd; --accent-3: #8c8c8c; --on-accent: #0a0a0a;
  --good: #f2f2f2; --bad: #f2f2f2; --warn: #bdbdbd;
}
:root[data-theme="light"][data-vision="mono"] {
  --accent: #141414; --accent-2: #4d4d4d; --accent-3: #7a7a7a; --on-accent: #ffffff;
  --good: #141414; --bad: #141414; --warn: #4d4d4d;
}

/* High contrast: solid surfaces, strong borders, no translucency. */
:root[data-contrast="high"] {
  --bg: #000000; --bg-2: #000000;
  --surface: #0a0a0a; --surface-2: #141414; --surface-solid: #0a0a0a;
  --line: rgba(255, 255, 255, 0.55); --line-strong: #ffffff;
  --text: #ffffff; --text-2: #ffffff; --muted: #d9d9d9;
  --glow: 0; --blur: 0px; --shadow: none;
}
:root[data-theme="light"][data-contrast="high"] {
  --bg: #ffffff; --bg-2: #ffffff;
  --surface: #ffffff; --surface-2: #f2f2f2; --surface-solid: #ffffff;
  --line: rgba(0, 0, 0, 0.6); --line-strong: #000000;
  --text: #000000; --text-2: #000000; --muted: #333333;
}
:root[data-contrast="high"]:not([data-theme="light"]):not([data-vision]),
:root[data-contrast="high"][data-vision="standard"]:not([data-theme="light"]) {
  --accent: #ffd97a; --accent-2: #b3c4ff; --accent-3: #8ff0e0;
}
:root[data-theme="light"][data-contrast="high"]:not([data-vision]),
:root[data-theme="light"][data-contrast="high"][data-vision="standard"] {
  --accent: #6b4700; --accent-2: #1f35a8; --accent-3: #075c50;
  --good: #075c40; --bad: #a3121f; --warn: #6b4700;
}

:root[data-text="lg"] { --scale: 1.125; }
:root[data-text="xl"] { --scale: 1.25; }

/* ---------- 2. Base ------------------------------------------------------ */

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

html {
  font-size: calc(100% * var(--scale));
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.5s var(--ease), color 0.5s var(--ease);
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
img, svg, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: color-mix(in srgb, var(--accent) 45%, transparent); color: var(--text); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}
:root[data-contrast="high"] :focus-visible { outline-width: 4px; }
:root[data-contrast="high"] main a:not(.btn):not(.card) { text-decoration: underline; }

.skip-link {
  position: fixed; top: 0.75rem; left: 0.75rem; z-index: 200;
  padding: 0.6rem 1rem; border-radius: 999px;
  background: var(--accent); color: var(--on-accent); font-weight: 700;
  transform: translateY(-200%); transition: transform 0.2s var(--ease);
}
.skip-link:focus { transform: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.icon { width: 1.25em; height: 1.25em; flex: none; stroke: currentColor; fill: none;
  stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.mono { font-family: var(--font-mono); font-size: 0.86em; letter-spacing: -0.01em; }

/* ---------- 3. Backdrop: aurora + particle canvas ------------------------ */

.backdrop {
  position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -10%, var(--bg-2), transparent 70%),
    var(--bg);
  view-transition-name: backdrop;
}
.backdrop__aurora {
  position: absolute; border-radius: 50%; filter: blur(90px);
  opacity: var(--glow); will-change: transform;
  transition: background-color 0.8s var(--ease), opacity 0.8s var(--ease);
}
.backdrop__aurora--a {
  width: 52vmax; height: 52vmax; top: -22vmax; left: -12vmax;
  background: color-mix(in srgb, var(--accent-2) 70%, transparent);
  animation: drift-a 34s ease-in-out infinite alternate;
}
.backdrop__aurora--b {
  width: 44vmax; height: 44vmax; top: 8vmax; right: -18vmax;
  background: color-mix(in srgb, var(--accent) 55%, transparent);
  animation: drift-b 42s ease-in-out infinite alternate;
}
.backdrop__aurora--c {
  width: 40vmax; height: 40vmax; bottom: -22vmax; left: 22vmax;
  background: color-mix(in srgb, var(--accent-3) 50%, transparent);
  animation: drift-c 48s ease-in-out infinite alternate;
}
.backdrop__canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0;
  transition: opacity 1.4s var(--ease); }
.backdrop__canvas.is-ready { opacity: 1; }
.backdrop__grain {
  position: absolute; inset: 0; opacity: 0.5; mix-blend-mode: overlay;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 10%, transparent 75%);
}
:root[data-contrast="high"] .backdrop__aurora,
:root[data-contrast="high"] .backdrop__canvas,
:root[data-contrast="high"] .backdrop__grain { display: none; }

@keyframes drift-a { to { transform: translate3d(14vmax, 10vmax, 0) scale(1.15); } }
@keyframes drift-b { to { transform: translate3d(-16vmax, 12vmax, 0) scale(0.9); } }
@keyframes drift-c { to { transform: translate3d(10vmax, -12vmax, 0) scale(1.2); } }

/* ---------- 4. Layout ---------------------------------------------------- */

.container { width: min(1180px, 100% - 2.5rem); margin-inline: auto; }
.container--narrow { width: min(820px, 100% - 2.5rem); }

main { display: block; padding-top: 6.5rem; }
.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--tight { padding-block: clamp(2rem, 5vw, 3.5rem); }

.eyebrow {
  display: inline-flex; align-items: center; flex-wrap: wrap; gap: 0.25rem 0.6rem;
  font-size: 0.74rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before { content: ""; width: 1.75rem; height: 1px; background: currentColor; }

.section__head { display: grid; gap: 1rem; margin-bottom: clamp(2rem, 4vw, 3.25rem); max-width: 46rem; }
.section__head--split {
  max-width: none; grid-template-columns: 1fr auto; align-items: end; column-gap: 2rem;
}
.section__title { font-size: clamp(2rem, 4.4vw, 3.25rem); }
.section__title em { font-style: italic; color: var(--accent); font-weight: 400; }
.lede { font-size: 1.1rem; color: var(--text-2); max-width: 40rem; }

/* ---------- 5. Header ---------------------------------------------------- */

.site-header {
  position: fixed; top: 0.9rem; left: 0; right: 0; z-index: 60;
  view-transition-name: site-header;
}
.nav {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 0.5rem 0.5rem 1.1rem;
  border: 1px solid var(--line); border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  backdrop-filter: blur(var(--blur)) saturate(1.5);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(1.5);
  box-shadow: var(--shadow);
  transition: background-color 0.4s var(--ease), border-color 0.4s var(--ease), padding 0.4s var(--ease);
}
/* Once the page scrolls, the bar firms up so text never shows through it. */
.is-scrolled .nav { background: color-mix(in srgb, var(--bg) 90%, transparent); border-color: var(--line-strong); }
:root[data-contrast="high"] .nav { background: var(--bg); }

.brand { display: inline-flex; align-items: center; gap: 0.65rem; font-family: var(--font-display);
  font-size: 1.2rem; font-weight: 500; letter-spacing: -0.02em; margin-right: auto; }
.brand__mark { width: 1.9rem; height: 1.9rem; color: var(--accent); transition: transform 0.8s var(--ease); }
.brand:hover .brand__mark { transform: rotate(120deg); }

.nav__links { display: flex; align-items: center; gap: 0.15rem; }
.nav__link {
  position: relative; padding: 0.55rem 0.95rem; border-radius: 999px; white-space: nowrap;
  font-size: 0.92rem; font-weight: 600; color: var(--text-2);
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease);
}
.nav__link:hover { color: var(--text); background: var(--surface-2); }
.nav__link[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.nav__link[aria-current="page"]::after {
  content: ""; position: absolute; left: 50%; bottom: 0.25rem; width: 0.3rem; height: 0.3rem;
  border-radius: 50%; background: var(--accent); transform: translateX(-50%);
}

.icon-btn {
  display: inline-grid; place-items: center; width: 2.6rem; height: 2.6rem; border-radius: 50%;
  color: var(--text-2); border: 1px solid transparent;
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.4s var(--ease);
}
.icon-btn:hover { color: var(--text); background: var(--surface-2); border-color: var(--line); }
.icon-btn:active { transform: scale(0.92); }
.icon-btn[aria-expanded="true"] { color: var(--accent); background: var(--surface-2); border-color: var(--line); }

.theme-toggle .icon { transition: transform 0.6s var(--ease), opacity 0.3s var(--ease); grid-area: 1 / 1; }
.theme-toggle .icon--sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
:root[data-theme="light"] .theme-toggle .icon--sun { opacity: 1; transform: none; }
:root[data-theme="light"] .theme-toggle .icon--moon { opacity: 0; transform: rotate(90deg) scale(0.5); }

.nav__menu-btn { display: none; }

/* ---------- 6. Buttons, chips, cards -------------------------------------- */

.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  padding: 0.85rem 1.5rem; border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  border: 1px solid transparent; white-space: nowrap; isolation: isolate; overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), background-color 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.btn .icon { transition: transform 0.35s var(--ease); }
.btn:hover .icon--arrow { transform: translateX(4px); }
.btn:active { transform: scale(0.97); }

.btn--primary {
  background: var(--accent); color: var(--on-accent);
  box-shadow: 0 12px 32px -14px color-mix(in srgb, var(--accent) 80%, transparent);
}
.btn--primary::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.55) 50%, transparent 70%);
  transform: translateX(-120%); transition: transform 0.8s var(--ease);
}
.btn--primary:hover { transform: translateY(-2px);
  box-shadow: 0 18px 40px -14px color-mix(in srgb, var(--accent) 90%, transparent); }
.btn--primary:hover::after { transform: translateX(120%); }

.btn--ghost { border-color: var(--line-strong); color: var(--text); background: var(--surface); }
.btn--ghost:hover { border-color: var(--accent); transform: translateY(-2px); }
.btn--sm { padding: 0.6rem 1.1rem; font-size: 0.86rem; }

.chip {
  display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.3rem 0.75rem;
  border: 1px solid var(--line); border-radius: 999px; background: var(--surface);
  font-size: 0.78rem; font-weight: 600; color: var(--text-2); white-space: nowrap;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background-color 0.25s var(--ease);
}
a.chip:hover, .chip[aria-current="true"] { border-color: var(--accent); color: var(--text); }
.chip[aria-current="true"] { background: color-mix(in srgb, var(--accent) 16%, transparent); }
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; }

.panel {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow);
}
:root[data-contrast="high"] .panel, :root[data-contrast="high"] .card { border-width: 2px; }

/* System card */
.grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }

.card {
  --rx: 0deg; --ry: 0deg; --mx: 50%; --my: 0%;
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform 0.5s var(--ease), border-color 0.4s var(--ease), box-shadow 0.5s var(--ease);
  will-change: transform;
}
.card::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none; opacity: 0;
  background: radial-gradient(28rem circle at var(--mx) var(--my),
    color-mix(in srgb, var(--accent) 20%, transparent), transparent 55%);
  transition: opacity 0.5s var(--ease);
}
.card:hover, .card:focus-visible { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); box-shadow: var(--shadow); }
.card:hover::before, .card:focus-visible::before { opacity: 1; }
.card.is-tilting { transition: border-color 0.4s var(--ease), box-shadow 0.5s var(--ease); }

.card__cover {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  background:
    radial-gradient(90% 120% at 15% 0%, color-mix(in srgb, var(--accent-2) 38%, transparent), transparent 60%),
    radial-gradient(80% 110% at 100% 100%, color-mix(in srgb, var(--accent) 34%, transparent), transparent 60%),
    var(--surface-solid);
  border-bottom: 1px solid var(--line);
}
.card__cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.card:hover .card__cover img { transform: scale(1.05); }
.card__glyph { position: absolute; inset: 0; margin: auto; width: 46%; height: 70%; color: var(--text);
  opacity: 0.9; transition: transform 0.9s var(--ease); }
.card:hover .card__glyph { transform: scale(1.08) rotate(6deg); }
.card__glyph .stroke-accent { stroke: var(--accent); }
.card__initials {
  position: absolute; left: 1.1rem; bottom: 0.8rem; font-family: var(--font-display);
  font-size: 0.8rem; letter-spacing: 0.24em; color: var(--text-2);
}
.card__year { position: absolute; right: 1.1rem; top: 0.9rem; font-family: var(--font-mono);
  font-size: 0.72rem; color: var(--text-2); }

.card__body { display: grid; gap: 0.7rem; padding: 1.35rem 1.4rem 1.5rem; flex: 1; align-content: start; }
.card__title { font-size: 1.45rem; }
.card__text { color: var(--text-2); font-size: 0.95rem; }
.card__more {
  display: inline-flex; align-items: center; gap: 0.45rem; margin-top: 0.35rem;
  font-size: 0.86rem; font-weight: 700; color: var(--accent);
}
.card__more .icon { transition: transform 0.35s var(--ease); }
.card:hover .card__more .icon { transform: translateX(5px); }
.card__link::after { content: ""; position: absolute; inset: 0; z-index: 2; }

/* ---------- 7. Hero ------------------------------------------------------ */

.hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center; gap: 2rem; min-height: min(86vh, 800px); padding-block: 2rem 3rem; }
.hero__copy { display: grid; gap: 1.6rem; justify-items: start; }
.hero__title { font-size: clamp(2.7rem, 6.6vw, 5.2rem); line-height: 0.98; letter-spacing: -0.035em; }
.hero__title em { font-style: italic; font-weight: 400; color: var(--accent); }
.hero__title .line { display: block; overflow: hidden; padding-bottom: 0.08em; }
.hero__title .line > span { display: inline-block; animation: rise 1.1s var(--ease) both; }
.hero__title .line:nth-child(2) > span { animation-delay: 0.12s; }
.hero__title .line:nth-child(3) > span { animation-delay: 0.24s; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.hero__copy > :not(.hero__title) { animation: fade-up 1s var(--ease) 0.35s both; }

.hero__stage { position: relative; aspect-ratio: 1; width: 100%; max-width: 620px; justify-self: end; }
.hero__stage canvas { position: absolute; inset: -8%; width: 116%; height: 116%; opacity: 0;
  transition: opacity 1.2s var(--ease); }
.hero__stage canvas.is-ready { opacity: 1; }
.hero__halo { position: absolute; inset: 14%; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 34%, transparent), transparent 66%);
  filter: blur(30px); opacity: calc(var(--glow) * 1.6); animation: breathe 7s ease-in-out infinite; }
/* Shown until WebGL is ready, and kept if it is unavailable. */
.stage-fallback { position: absolute; inset: 18%; color: var(--accent); opacity: 0.85;
  transition: opacity 0.8s var(--ease); animation: spin 60s linear infinite; }
canvas.is-ready ~ .stage-fallback { opacity: 0; }

.scroll-cue { position: absolute; left: 0; bottom: 0; display: inline-flex; align-items: center; gap: 0.7rem;
  font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted);
  transition: opacity 0.5s var(--ease), transform 0.6s var(--ease); }
.is-scrolled .scroll-cue { opacity: 0; transform: translateY(10px); }
.scroll-cue i { width: 1px; height: 2.4rem; background: linear-gradient(var(--accent), transparent);
  animation: cue 2.4s var(--ease) infinite; transform-origin: top; }

/* ---------- 8. Stats ----------------------------------------------------- */

.stats { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 1.6rem 1.75rem; display: grid; gap: 0.35rem; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat__value { font-family: var(--font-display); font-size: clamp(2.1rem, 4vw, 3rem); line-height: 1;
  letter-spacing: -0.03em; }
.stat__label { font-size: 0.82rem; color: var(--text-2); }
.stat__value small { font-family: var(--font-body); font-size: 0.9rem; font-weight: 600; color: var(--text-2);
  letter-spacing: 0; margin-left: 0.3rem; }

/* Technology band: a slow, endless scroll. Pauses on hover; still when motion is reduced. */
.marquee { --duration: 60s; position: relative; margin-top: clamp(2.5rem, 6vw, 4.5rem); overflow: hidden;
  padding-block: 0.4rem; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee__label { margin-bottom: 1.1rem; text-align: center; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); }
.marquee__track { display: flex; width: max-content; animation: marquee var(--duration) linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__list { display: flex; flex: none; }
.marquee__list li { display: inline-flex; align-items: center; gap: clamp(1.4rem, 3vw, 2.4rem);
  padding-right: clamp(1.4rem, 3vw, 2.4rem); font-family: var(--font-display); font-style: italic; font-weight: 400;
  font-size: clamp(1.35rem, 2.6vw, 2.1rem); line-height: 1.3; color: var(--text-2); white-space: nowrap;
  transition: color 0.3s var(--ease); }
.marquee__list li:hover { color: var(--text); }
.marquee__list li::after { content: ""; width: 0.42rem; height: 0.42rem; flex: none; background: var(--accent);
  transform: rotate(45deg); opacity: 0.75; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Status: icon + label + colour. The shape differs per state as well. */
.status { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 0.9rem; }
.status__dot { position: relative; width: 0.7rem; height: 0.7rem; border-radius: 50%; background: var(--good); flex: none; }
.status__dot::after { content: ""; position: absolute; inset: -0.3rem; border-radius: 50%;
  border: 1px solid var(--good); opacity: 0.6; animation: ping 2.4s var(--ease) infinite; }
.status--bad .status__dot { background: var(--bad); border-radius: 2px; transform: rotate(45deg); }
.status--bad .status__dot::after { display: none; }
.status--off .status__dot { background: none; border: 2px dashed var(--muted); }
.status--off .status__dot::after { display: none; }

/* ---------- 9. Process timeline ----------------------------------------- */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; counter-reset: step; }
.step { position: relative; padding: 1.6rem 1.5rem 1.7rem; display: grid; gap: 0.6rem; align-content: start;
  counter-increment: step; overflow: hidden; }
.step::before { content: counter(step, decimal-leading-zero); font-family: var(--font-mono);
  font-size: 0.78rem; color: var(--accent); letter-spacing: 0.1em; }
.step::after { content: ""; position: absolute; left: 0; top: 0; height: 2px; width: 100%;
  background: linear-gradient(90deg, var(--accent), transparent); transform: scaleX(0);
  transform-origin: left; transition: transform 1.2s var(--ease) 0.2s; }
.step.is-in::after { transform: scaleX(1); }
.step__title { font-size: 1.3rem; }
.step__text { color: var(--text-2); font-size: 0.94rem; }

/* ---------- 10. Feature / proof ------------------------------------------ */

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.proof-list { display: grid; gap: 1rem; }
.proof { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: 1.2rem 1.3rem; align-items: start; }
.proof__icon { display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border-radius: 14px;
  background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.proof h3 { font-family: var(--font-body); font-size: 1rem; font-weight: 700; letter-spacing: 0; margin-bottom: 0.2rem; }
.proof p { color: var(--text-2); font-size: 0.93rem; }

.note { display: grid; grid-template-columns: auto 1fr; gap: 0.9rem; padding: 1.1rem 1.25rem;
  border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); color: var(--text-2);
  font-size: 0.92rem; background: var(--surface); }
.note .icon { color: var(--accent); margin-top: 0.15rem; }
.note strong { color: var(--text); }

.cta { text-align: center; padding: clamp(2.5rem, 6vw, 4.5rem) 1.5rem; display: grid; gap: 1.4rem; justify-items: center;
  overflow: hidden; }
.cta::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: calc(var(--glow) * 1.2);
  background: radial-gradient(60% 120% at 50% 120%, var(--accent), transparent 70%); }
.cta__title { font-size: clamp(2rem, 4.6vw, 3.4rem); }
.cta__title em { font-style: italic; color: var(--accent); font-weight: 400; }

/* ---------- 11. System detail -------------------------------------------- */

.page-head { display: grid; gap: 1.2rem; padding-block: 1.5rem 2.5rem; max-width: 50rem; }
.page-title { font-size: clamp(2.5rem, 6vw, 4.5rem); letter-spacing: -0.035em; }
.page-title em { font-style: italic; color: var(--accent); font-weight: 400; }
.crumbs { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--muted); }
.crumbs a:hover { color: var(--accent); }

.detail { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.detail__stage { position: sticky; top: 6.5rem; aspect-ratio: 1; overflow: hidden; cursor: grab; touch-action: pan-y; }
.detail__stage:active { cursor: grabbing; }
.detail__stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; transition: opacity 1.2s var(--ease); }
.detail__stage canvas.is-ready { opacity: 1; }
.detail__hint { position: absolute; left: 1.1rem; bottom: 0.9rem; font-size: 0.74rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted); }
.detail__body { display: grid; gap: 2.5rem; }
.block-title { font-family: var(--font-body); font-size: 0.76rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 0.9rem; }
.prose { color: var(--text-2); font-size: 1.05rem; white-space: pre-line; }
.objectives { display: grid; gap: 0.65rem; counter-reset: objective; }
.objectives li { display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.5rem; padding: 0.95rem 1.1rem;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface);
  counter-increment: objective; transition: border-color 0.3s var(--ease), transform 0.4s var(--ease); }
.objectives li:hover { border-color: var(--accent); transform: translateX(4px); }
.objectives li::before { content: counter(objective, decimal-leading-zero); font-family: var(--font-mono);
  font-size: 0.8rem; color: var(--accent); padding-top: 0.2rem; }

.shots { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); gap: 1rem; }
.shot { overflow: hidden; border-radius: var(--radius-sm); border: 1px solid var(--line); cursor: zoom-in;
  background: var(--surface-solid); padding: 0; }
.shot img { aspect-ratio: 16 / 10; width: 100%; object-fit: cover; transition: transform 0.7s var(--ease); }
.shot:hover img { transform: scale(1.05); }
.shot figcaption, .shot span { display: block; padding: 0.6rem 0.8rem; font-size: 0.82rem; color: var(--text-2); text-align: left; }

.lightbox { border: 0; padding: 0; background: transparent; max-width: min(1200px, 94vw); max-height: 92vh; }
.lightbox::backdrop { background: rgba(3, 5, 10, 0.86); backdrop-filter: blur(6px); }
.lightbox img { max-height: 86vh; border-radius: var(--radius-sm); box-shadow: var(--shadow); }
.lightbox[open] { animation: zoom-in 0.4s var(--ease); }
.lightbox__close { position: absolute; top: 0.6rem; right: 0.6rem; background: var(--surface-solid);
  border: 1px solid var(--line); }

/* ---------- 12. Verify --------------------------------------------------- */

.verdict { display: grid; gap: 1.5rem; padding: clamp(1.75rem, 5vw, 3rem); justify-items: center; text-align: center;
  overflow: hidden; margin-top: clamp(0.75rem, 3vw, 2rem); --tone: var(--muted); }
.verdict--valid { --tone: var(--good); }
.verdict--tampered { --tone: var(--bad); }
.verdict--pending { --tone: var(--warn); }
.verdict::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: calc(var(--glow) * 0.9);
  background: radial-gradient(70% 90% at 50% -10%, var(--tone), transparent 70%); }
.verdict--tampered { border-style: double; border-width: 4px; border-color: var(--tone); }
.verdict--pending, .verdict--unavailable, .verdict--missing { border-style: dashed; border-color: var(--line-strong); }
.verdict--valid { border-color: color-mix(in srgb, var(--tone) 60%, var(--line)); }

.seal { position: relative; display: grid; place-items: center; width: 7.5rem; height: 7.5rem; color: var(--tone); }
.seal svg { width: 100%; height: 100%; }
.seal__ring { fill: none; stroke: currentColor; stroke-width: 1.5; opacity: 0.35; }
.seal__ring--dash { stroke-dasharray: 3 7; opacity: 0.7; transform-origin: center; animation: spin 40s linear infinite; }
.seal__shape { fill: color-mix(in srgb, currentColor 16%, transparent); stroke: currentColor; stroke-width: 2; stroke-linejoin: round; }
.seal__mark { fill: none; stroke: currentColor; stroke-width: 3.2; stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 60; stroke-dashoffset: 60; animation: draw 0.9s var(--ease) 0.5s forwards; }
.verdict__state { font-size: 0.78rem; font-weight: 800; letter-spacing: 0.26em; text-transform: uppercase; color: var(--text); }
.verdict__title { font-size: clamp(2rem, 5vw, 3.2rem); }
.verdict__summary { color: var(--text-2); max-width: 36rem; font-size: 1.05rem; }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); width: 100%;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); text-align: left; }
.fact { padding: 1rem 1.2rem; border-left: 1px solid var(--line); display: grid; gap: 0.2rem; }
.fact:first-child { border-left: 0; }
.fact dt { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.fact dd { margin: 0; font-weight: 700; font-size: 1.02rem; }
.fact dd.mono { font-size: 0.9rem; white-space: nowrap; }  /* a receipt code never breaks at its hyphens */

.checks { display: grid; gap: 0.6rem; }
.check { display: grid; grid-template-columns: auto 1fr; gap: 0.9rem; padding: 1rem 1.15rem; align-items: start;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.check__icon { display: grid; place-items: center; width: 1.9rem; height: 1.9rem; border-radius: 50%; flex: none;
  color: var(--tone, var(--muted)); border: 2px solid currentColor; }
.check__icon .icon { width: 1rem; height: 1rem; stroke-width: 2.6; }
.check--pass { --tone: var(--good); }
.check--fail { --tone: var(--bad); border-color: var(--bad); border-style: double; border-width: 3px; }
.check--fail .check__icon { border-radius: 6px; }
.check--skip { --tone: var(--muted); }
.check--skip .check__icon { border-style: dashed; }
.check__label { font-weight: 700; }
.check__result { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-2); margin-left: 0.5rem; }
.check__detail { color: var(--text-2); font-size: 0.92rem; }

.tech { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.tech summary { display: flex; align-items: center; gap: 0.6rem; padding: 1rem 1.2rem; cursor: pointer;
  font-weight: 700; list-style: none; }
.tech summary::-webkit-details-marker { display: none; }
.tech summary .icon { transition: transform 0.35s var(--ease); margin-left: auto; }
.tech[open] summary .icon { transform: rotate(180deg); }
.tech__rows { display: grid; gap: 0.9rem; padding: 0 1.2rem 1.2rem; }
.tech__row dt { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.tech__row dd { margin: 0.2rem 0 0; word-break: break-all; color: var(--text-2); }

.lookup { display: flex; gap: 0.6rem; padding: 0.5rem; border-radius: 999px; }
.lookup input { flex: 1; min-width: 0; background: none; border: 0; color: var(--text); font: inherit;
  padding: 0.6rem 1rem; outline: none; }
.lookup input::placeholder { color: var(--muted); }
.lookup:focus-within { border-color: var(--accent); }
.form-error { display: flex; gap: 0.6rem; align-items: center; color: var(--text); font-weight: 600;
  padding: 0.8rem 1rem; border: 2px solid var(--bad); border-radius: var(--radius-sm); }
.form-error .icon { color: var(--bad); }

.mini-list { display: grid; gap: 0.6rem; }
.mini { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem 1rem; align-items: center; padding: 1rem 1.2rem;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface);
  transition: border-color 0.3s var(--ease), transform 0.4s var(--ease); }
.mini:hover { border-color: var(--accent); transform: translateX(4px); }
.mini__name { font-family: var(--font-display); font-size: 1.2rem; }
.mini .chips { grid-column: 1 / -1; }
.mini .icon { color: var(--accent); }

/* ---------- 13. Ledger --------------------------------------------------- */

.chain { display: grid; gap: 0; position: relative; }
.block { position: relative; display: grid; grid-template-columns: auto 1fr auto; gap: 1.1rem; align-items: center;
  padding: 1.1rem 1.3rem; margin-left: 1.4rem; }
.block + .block { margin-top: 1.4rem; }
.block + .block::before { content: ""; position: absolute; left: 2.3rem; top: -1.4rem; height: 1.4rem; width: 2px;
  background: repeating-linear-gradient(var(--accent) 0 4px, transparent 4px 8px); }
.block__index { display: grid; place-items: center; min-width: 3.4rem; height: 3.4rem; padding-inline: 0.5rem;
  border-radius: 14px; font-family: var(--font-mono); font-weight: 500;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--text); }
.block__hash { color: var(--text); word-break: break-all; }
.block__meta { display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; font-size: 0.84rem; color: var(--text-2); margin-top: 0.2rem; }
.block__tag { font-size: 0.7rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }

/* ---------- 14. Footer --------------------------------------------------- */

.site-footer { margin-top: 4rem; border-top: 1px solid var(--line); padding-block: 2.5rem 6.5rem; }
.footer { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
.footer__about { display: grid; gap: 0.9rem; color: var(--text-2); font-size: 0.92rem; max-width: 26rem; }
.footer h2 { font-family: var(--font-body); font-size: 0.74rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 0.9rem; }
.footer li { margin-bottom: 0.45rem; }
.footer li a { color: var(--text-2); transition: color 0.25s var(--ease); }
.footer li a:hover { color: var(--accent); }
.footer__fine { margin-top: 2rem; font-size: 0.8rem; color: var(--muted); }

/* ---------- 15. Accessibility panel -------------------------------------- */

/* Above the chat button, so nothing covers the panel's last controls. */
.a11y { position: fixed; top: 4.9rem; right: max(1.25rem, calc((100vw - 1180px) / 2)); z-index: 95;
  width: min(23rem, calc(100vw - 2rem)); padding: 1.15rem 1.2rem; display: grid; gap: 0.95rem;
  background: color-mix(in srgb, var(--surface-solid) 94%, transparent);
  opacity: 0; visibility: hidden; transform: translateY(-10px) scale(0.98); transform-origin: top right;
  transition: opacity 0.3s var(--ease), transform 0.4s var(--ease), visibility 0.3s;
  max-height: calc(100vh - 6rem); overflow-y: auto; }
.a11y.is-open { opacity: 1; visibility: visible; transform: none; }
.a11y__title { font-family: var(--font-display); font-size: 1.35rem; }
.a11y__group { display: grid; gap: 0.5rem; border: 0; padding: 0; margin: 0; min-width: 0; }
.a11y__group legend { padding: 0; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 0.5rem; }
.a11y__hint { font-size: 0.8rem; color: var(--muted); }
.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 0.3rem; padding: 0.3rem;
  border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.seg--stack { grid-auto-flow: row; }
.seg label { position: relative; display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.45rem 0.6rem; border-radius: 10px; font-size: 0.84rem; font-weight: 600; color: var(--text-2);
  cursor: pointer; text-align: center; transition: background-color 0.25s var(--ease), color 0.25s var(--ease); }
.seg--stack label { justify-content: flex-start; padding-inline: 0.8rem; }
.seg input { position: absolute; opacity: 0; inset: 0; cursor: pointer; margin: 0; }
.seg label:hover { color: var(--text); }
.seg label:has(input:checked) { background: var(--accent); color: var(--on-accent); }
.seg label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.swatches { display: inline-flex; margin-left: auto; }
.swatches i { width: 0.85rem; height: 0.85rem; border-radius: 50%; border: 1.5px solid var(--surface-solid); margin-left: -0.25rem; }

/* ---------- 16. Chat widget ---------------------------------------------- */

.chat-fab { position: fixed; right: 1.4rem; bottom: 1.4rem; z-index: 80; display: inline-flex; align-items: center;
  gap: 0.6rem; padding: 0.85rem 1.2rem 0.85rem 1rem; border-radius: 999px; font-weight: 700; font-size: 0.92rem;
  background: var(--accent); color: var(--on-accent);
  box-shadow: 0 18px 44px -14px color-mix(in srgb, var(--accent) 85%, transparent);
  transition: transform 0.4s var(--ease), opacity 0.3s var(--ease); view-transition-name: chat-fab; }
.chat-fab:hover { transform: translateY(-3px) scale(1.03); }
.chat-fab.is-hidden { opacity: 0; pointer-events: none; transform: scale(0.8); }
.chat-fab__pulse { position: absolute; inset: 0; border-radius: inherit; border: 2px solid var(--accent);
  animation: ping 3s var(--ease) infinite; pointer-events: none; }

.chat { position: fixed; right: 1.4rem; bottom: 1.4rem; z-index: 90; width: min(25rem, calc(100vw - 1.5rem));
  height: min(38rem, calc(100vh - 2.8rem)); display: grid; grid-template-rows: auto 1fr auto auto; overflow: hidden;
  background: color-mix(in srgb, var(--surface-solid) 95%, transparent);
  opacity: 0; visibility: hidden; transform: translateY(24px) scale(0.96); transform-origin: bottom right;
  transition: opacity 0.35s var(--ease), transform 0.5s var(--ease), visibility 0.35s; }
.chat.is-open { opacity: 1; visibility: visible; transform: none; }
.chat__head { display: flex; align-items: center; gap: 0.8rem; padding: 1rem 1rem 1rem 1.2rem; border-bottom: 1px solid var(--line); }
.chat__avatar { display: grid; place-items: center; width: 2.5rem; height: 2.5rem; border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.chat__name { font-family: var(--font-display); font-size: 1.15rem; line-height: 1.1; }
.chat__sub { font-size: 0.76rem; color: var(--muted); }
.chat__log { overflow-y: auto; padding: 1.1rem; display: flex; flex-direction: column; gap: 0.7rem; scroll-behavior: smooth;
  overscroll-behavior: contain; }
.msg { max-width: 86%; padding: 0.7rem 0.95rem; border-radius: 18px; font-size: 0.93rem; line-height: 1.5;
  white-space: pre-line; overflow-wrap: anywhere; animation: msg-in 0.45s var(--ease) both; }
.msg--bot { align-self: flex-start; background: var(--surface-2); border: 1px solid var(--line); border-bottom-left-radius: 6px; }
.msg--user { align-self: flex-end; background: var(--accent); color: var(--on-accent); border-bottom-right-radius: 6px; font-weight: 600; }
.msg__links { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.6rem; }
.msg__links a { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0.3rem 0.7rem; border-radius: 999px;
  border: 1px solid var(--line-strong); font-size: 0.8rem; font-weight: 700; color: var(--text); white-space: normal; }
.msg__links a:hover { border-color: var(--accent); }
.typing { display: inline-flex; gap: 0.3rem; align-items: center; height: 1.4rem; }
.typing i { width: 0.42rem; height: 0.42rem; border-radius: 50%; background: var(--text-2); animation: bounce 1.2s infinite ease-in-out; }
.typing i:nth-child(2) { animation-delay: 0.15s; }
.typing i:nth-child(3) { animation-delay: 0.3s; }
.chat__suggest { display: flex; gap: 0.45rem; padding: 0 1.1rem 0.8rem; overflow-x: auto; scrollbar-width: none; }
.chat__suggest::-webkit-scrollbar { display: none; }
.chat__suggest button { flex: none; padding: 0.42rem 0.85rem; border-radius: 999px; border: 1px solid var(--line-strong);
  font-size: 0.8rem; font-weight: 600; color: var(--text-2); transition: border-color 0.25s var(--ease), color 0.25s var(--ease); }
.chat__suggest button:hover { border-color: var(--accent); color: var(--text); }
.chat__form { display: flex; gap: 0.5rem; padding: 0.8rem; border-top: 1px solid var(--line); }
.chat__form input { flex: 1; min-width: 0; padding: 0.75rem 1rem; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); font: inherit; font-size: 0.93rem; outline: none;
  transition: border-color 0.25s var(--ease); }
.chat__form input:focus { border-color: var(--accent); }
.chat__send { display: grid; place-items: center; width: 2.9rem; height: 2.9rem; border-radius: 50%; flex: none;
  background: var(--accent); color: var(--on-accent); transition: transform 0.3s var(--ease), opacity 0.3s; }
.chat__send:hover { transform: scale(1.07); }
.chat__send:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ---------- 17. Empty states, errors -------------------------------------- */

.empty { display: grid; gap: 1rem; justify-items: center; text-align: center; padding: clamp(2.5rem, 7vw, 5rem) 1.5rem; }
.empty .icon { width: 2.6rem; height: 2.6rem; color: var(--accent); }
.empty h2 { font-size: 1.8rem; }
.empty p { color: var(--text-2); max-width: 30rem; }

/* ---------- 17b. Back link, forms, reviews --------------------------------- */

/* Back arrow and label beside the logo, on every page but the homepage */
.brand--with-back { margin-right: 0; }
/* Plain bold text, no background: a thin divider separates it from the logo. */
.nav__back {
  display: inline-flex; align-items: center; gap: 0.45rem; margin-right: auto;
  padding: 0.5rem 0.5rem 0.5rem 0.3rem; white-space: nowrap;
  font-size: 0.92rem; font-weight: 700; color: var(--text);
}
.nav__back::before { content: ""; width: 1px; height: 1.25rem; margin-right: 0.5rem; background: var(--line-strong); }
.nav__back .icon { color: var(--accent); stroke-width: 2.2; transition: transform 0.35s var(--ease); }
.nav__back:hover span { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }
.nav__back:hover .icon { transform: translateX(-3px); }
.nav__back-short { display: none; }

/* Forms (message form, review form) */
.form { display: grid; gap: 1.25rem; }
.form--panel { padding: clamp(1.25rem, 4vw, 2.25rem); }
.form__row { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.field { display: grid; gap: 0.45rem; align-content: start; }
.field__label { font-weight: 700; font-size: 0.92rem; color: var(--text); }
.field__optional { font-weight: 500; color: var(--muted); }
.field input, .field textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--surface-2);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.8rem 1rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field textarea { min-height: 9rem; resize: vertical; line-height: 1.55; }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent);
}
.field__help { font-size: 0.84rem; color: var(--muted); }
.field__error { display: flex; align-items: center; gap: 0.45rem; font-size: 0.86rem; font-weight: 600; color: var(--text); }
.field__error .icon { color: var(--bad); }
.field--error input, .field--error textarea { border: 2px solid var(--bad); }
.form__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.9rem 1.25rem; }
.form__note { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.85rem; color: var(--muted); }
.form__note .icon { color: var(--accent); }
.form__trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* Message sent */
.sent { display: grid; gap: 1.2rem; justify-items: start; padding: clamp(1.75rem, 5vw, 3rem); margin-top: 1rem; overflow: hidden; }
.sent::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: calc(var(--glow) * 0.8);
  background: radial-gradient(70% 90% at 0% -10%, var(--good), transparent 70%); }
.sent__icon { display: grid; place-items: center; width: 3.5rem; height: 3.5rem; border-radius: 50%;
  color: var(--good); border: 2px solid currentColor; }
.sent__icon .icon { width: 1.6rem; height: 1.6rem; stroke-width: 2.4; }

/* Star rating input. The radios run 5..1 and the row is reversed, so "checked ~"
   fills the chosen star and every star before it. Filled vs. outline, not colour alone. */
.rate { border: 0; margin: 0; padding: 0; display: grid; gap: 0.35rem; min-width: 0; }
.rate legend { padding: 0; margin-bottom: 0.35rem; }
.rate__stars { display: inline-flex; flex-direction: row-reverse; justify-content: flex-end; gap: 0.15rem; }
.rate__input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.rate__star { display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border-radius: 12px; cursor: pointer;
  color: var(--muted); transition: color 0.2s var(--ease), transform 0.25s var(--ease), background-color 0.2s var(--ease); }
.rate__star .icon { width: 1.9rem; height: 1.9rem; stroke-width: 1.5; }
.rate__input:checked ~ .rate__star { color: var(--accent); }
.rate__input:checked ~ .rate__star .icon { fill: currentColor; }
.rate__stars:hover .rate__star { color: var(--muted); }
.rate__stars:hover .rate__star .icon { fill: none; }
.rate__stars:hover .rate__star:hover, .rate__stars:hover .rate__star:hover ~ .rate__star { color: var(--accent); }
.rate__stars:hover .rate__star:hover .icon, .rate__stars:hover .rate__star:hover ~ .rate__star .icon { fill: currentColor; }
.rate__star:hover { transform: scale(1.12); background: var(--surface-2); }
.rate__input:focus-visible + .rate__star { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Stars shown on a review */
.stars { display: inline-flex; gap: 0.12rem; color: var(--accent); }
.stars .icon { width: 1.05rem; height: 1.05rem; stroke-width: 1.6; }
.stars .icon.is-on { fill: currentColor; }
.stars .icon:not(.is-on) { color: var(--muted); }

/* Review cards */
.review-stats { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem; color: var(--text-2); }
.review-stats strong { color: var(--text); font-size: 1.1rem; }
.reviews { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); }
.review { display: grid; gap: 1rem; align-content: start; padding: 1.5rem 1.5rem 1.4rem; margin: 0; }
.review__top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.review__quote { width: 1.9rem; height: 1.9rem; color: var(--accent); opacity: 0.35; fill: currentColor; stroke: none; }
.review__text { margin: 0; font-family: var(--font-display); font-size: 1.12rem; line-height: 1.5; color: var(--text);
  white-space: pre-line; overflow-wrap: anywhere; }
.review__plain { color: var(--text-2); font-size: 0.95rem; }
.review__by { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 0.8rem; font-size: 0.86rem; color: var(--text-2); }
.review__name { font-weight: 700; color: var(--text); }
.review__verified { display: inline-flex; align-items: center; gap: 0.3rem; font-weight: 600; }
.review__verified .icon { width: 1rem; height: 1rem; color: var(--good); }
.review__system { color: var(--accent); font-weight: 600; }
.review__system:hover { text-decoration: underline; }

/* The review section of a receipt's verify page */
.review-box { display: grid; gap: 1.1rem; padding: clamp(1.25rem, 4vw, 2rem); }
.review-box__title { font-size: clamp(1.5rem, 3.5vw, 2rem); }
.review-box__lead { color: var(--text-2); }
.review-box__sent { display: flex; gap: 0.7rem; align-items: flex-start; padding: 0.9rem 1.1rem; border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--good) 55%, var(--line)); background: color-mix(in srgb, var(--good) 10%, transparent);
  font-weight: 600; }
.review-box__sent .icon { color: var(--good); flex: none; margin-top: 0.15rem; stroke-width: 2.4; }
.review-box__meta { display: flex; flex-wrap: wrap; gap: 0.4rem 0.6rem; color: var(--text-2); font-size: 0.92rem; }
.review-box__status { font-weight: 700; color: var(--text); }
.review-box > .btn { justify-self: start; }
.review-box .review__text { font-size: 1.05rem; }
.nav__link--phone { display: none; }

/* ---------- 18. Motion ---------------------------------------------------- */

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease), transform 1s var(--ease);
  transition-delay: calc(var(--i, 0) * 80ms); }
.reveal.is-in { opacity: 1; transform: none; }
html:not(.js) .reveal { opacity: 1; transform: none; }

@keyframes rise { from { transform: translateY(110%) rotate(4deg); } }
@keyframes fade-up { from { opacity: 0; transform: translateY(18px); } }
@keyframes breathe { 50% { transform: scale(1.12); opacity: calc(var(--glow) * 1.1); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes ping { 0% { transform: scale(0.9); opacity: 0.7; } 80%, 100% { transform: scale(1.9); opacity: 0; } }
@keyframes cue { 0% { transform: scaleY(0); } 50% { transform: scaleY(1); } 100% { transform: scaleY(1); opacity: 0; } }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes msg-in { from { opacity: 0; transform: translateY(10px) scale(0.97); } }
@keyframes bounce { 0%, 60%, 100% { transform: none; opacity: 0.5; } 30% { transform: translateY(-5px); opacity: 1; } }
@keyframes zoom-in { from { opacity: 0; transform: scale(0.94); } }
@keyframes page-in { from { opacity: 0; transform: translateY(16px); } }
@keyframes vt-out { to { opacity: 0; transform: translateY(-12px) scale(0.99); filter: blur(6px); } }
@keyframes vt-in { from { opacity: 0; transform: translateY(18px) scale(0.99); filter: blur(6px); } }

/* Page-to-page transitions (cross-document View Transitions). The header,
   backdrop and chat button keep their own layers, so they stay put while the
   page content glides out and in. */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vt-out 0.26s var(--ease-in) both; }
::view-transition-new(root) { animation: vt-in 0.55s var(--ease) 0.08s both; }
::view-transition-group(*) { animation-duration: 0.6s; animation-timing-function: var(--ease); }
::view-transition-old(backdrop), ::view-transition-new(backdrop),
::view-transition-old(site-header), ::view-transition-new(site-header),
::view-transition-old(chat-fab), ::view-transition-new(chat-fab) { animation: none; mix-blend-mode: normal; }
::view-transition-old(backdrop), ::view-transition-old(site-header), ::view-transition-old(chat-fab) { display: none; }

/* Browsers without cross-document transitions get a simple fade. */
.no-vt main { animation: page-in 0.6s var(--ease) both; }
.no-vt.is-leaving main { opacity: 0; transform: translateY(-10px); transition: opacity 0.2s var(--ease-in), transform 0.2s var(--ease-in); }

/* Reduced motion: from the system setting or the accessibility panel. */
@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
  :root:not([data-motion="full"]) *, :root:not([data-motion="full"]) *::before, :root:not([data-motion="full"]) *::after {
    animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; animation-delay: 0s !important;
    transition-duration: 0.001ms !important; scroll-behavior: auto !important;
  }
  :root:not([data-motion="full"]) .reveal { opacity: 1; transform: none; }
}
:root[data-motion="reduce"] *, :root[data-motion="reduce"] *::before, :root[data-motion="reduce"] *::after {
  animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; animation-delay: 0s !important;
  transition-duration: 0.001ms !important; scroll-behavior: auto !important;
}
:root[data-motion="reduce"] .reveal { opacity: 1; transform: none; }
/* A still marquee shows a centred, wrapped list instead of a frozen strip. */
:root[data-motion="reduce"] .marquee { mask-image: none; -webkit-mask-image: none; }
:root[data-motion="reduce"] .marquee__track { width: auto; justify-content: center; }
:root[data-motion="reduce"] .marquee__list { flex: 1 1 100%; flex-wrap: wrap; justify-content: center; row-gap: 0.4rem; }
:root[data-motion="reduce"] .marquee__list[aria-hidden="true"],
:root[data-motion="reduce"] .marquee__repeat { display: none; }
@media (prefers-reduced-motion: reduce) {
  :root:not([data-motion="full"]) .marquee { mask-image: none; -webkit-mask-image: none; }
  :root:not([data-motion="full"]) .marquee__track { width: auto; justify-content: center; }
  :root:not([data-motion="full"]) .marquee__list { flex: 1 1 100%; flex-wrap: wrap; justify-content: center; row-gap: 0.4rem; }
  :root:not([data-motion="full"]) .marquee__list[aria-hidden="true"],
  :root:not([data-motion="full"]) .marquee__repeat { display: none; }
}
:root[data-motion="reduce"]::view-transition-group(*),
:root[data-motion="reduce"]::view-transition-old(*),
:root[data-motion="reduce"]::view-transition-new(*) { animation: none !important; }

/* ---------- 19. Responsive ------------------------------------------------ */

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 1rem; }
  .hero__stage { justify-self: center; max-width: 420px; order: -1; }
  .scroll-cue { display: none; }
  .split, .detail { grid-template-columns: 1fr; }
  .detail__stage { position: relative; top: 0; max-width: 460px; width: 100%; justify-self: center; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(odd) { border-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .footer { grid-template-columns: 1fr 1fr; }
  .footer__about { grid-column: 1 / -1; }
  .section__head--split { grid-template-columns: 1fr; row-gap: 1.2rem; }
}

@media (max-width: 720px) {
  .nav__menu-btn { display: inline-grid; }
  .nav__links { position: absolute; top: calc(100% + 0.6rem); left: 0; right: 0; flex-direction: column; align-items: stretch;
    padding: 0.6rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-solid);
    box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity 0.3s var(--ease), transform 0.4s var(--ease), visibility 0.3s; }
  .nav__links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__link { padding: 0.85rem 1rem; }
  .nav__link--phone { display: block; }
  .nav__link[aria-current="page"]::after { left: auto; right: 1rem; bottom: 50%; transform: translateY(50%); }
  .nav { position: relative; }
  .nav .btn { display: none; }
  .steps { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr 1fr; }
  .fact { border-left: 0; border-top: 1px solid var(--line); padding: 0.85rem 0.9rem; }
  .hero .eyebrow__sep { display: none; }
  .fact:nth-child(-n + 2) { border-top: 0; }
  .fact:nth-child(even) { border-left: 1px solid var(--line); }
  .block { grid-template-columns: auto 1fr; margin-left: 0; }
  .block + .block::before { left: 2.9rem; }
  .block > :last-child { grid-column: 1 / -1; }
  .chat { right: 0.75rem; bottom: 0.75rem; }
  .chat-fab span.chat-fab__label { display: none; }
  .chat-fab { padding: 0.95rem; }
  .lookup { flex-direction: column; border-radius: var(--radius); }
  .a11y { right: 1rem; }
}

/* The back label beside the logo shortens as the top bar gets tighter: the full
   sentence on wide screens, "Home" below that, and on small screens the logo
   keeps its mark but drops its wordmark to make room. */
@media (max-width: 1080px) {
  .nav__back-long { display: none; }
  .nav__back-short { display: inline; }
}
@media (max-width: 860px) {
  .brand--with-back span { display: none; }
}
@media (max-width: 340px) {
  .nav__back-short { display: none; }
}

/* Narrow tablets: "Verify a receipt" becomes "Verify" so the top bar stays on one line. */
@media (min-width: 721px) and (max-width: 940px) {
  .nav__more { display: none; }
}

/* Small phones: long values (system name, amount) get a full row on the receipt card. */
@media (max-width: 420px) {
  .fact:nth-child(n + 3) { grid-column: 1 / -1; border-left: 0; }
}

@media print {
  .backdrop, .site-header, .chat, .chat-fab, .a11y, .site-footer { display: none !important; }
  body { background: #fff; color: #000; }
  main { padding-top: 0; }
}