/* SySys marketing site
   Order: tokens > base > layout > components > sections.
   Light/dark come from color-scheme + light-dark(); change --hue to re-theme. */

/* ---------- Tokens ---------- */
:root {
  color-scheme: light dark;
  --hue: 248;                          /* brand #4277a7 = oklch(0.554 0.094 248) */

  --brand:        light-dark(oklch(0.554 0.094 var(--hue)), oklch(0.72 0.10 var(--hue)));
  --brand-strong: light-dark(oklch(0.46 0.10 var(--hue)),   oklch(0.80 0.09 var(--hue)));
  --brand-soft:   light-dark(oklch(0.95 0.02 var(--hue)),   oklch(0.27 0.04 var(--hue)));
  --btn-bg:       light-dark(oklch(0.46 0.10 var(--hue)),   oklch(0.72 0.10 var(--hue)));
  --on-brand:     light-dark(oklch(0.99 0 0),               oklch(0.17 0.02 var(--hue)));

  --bg:        light-dark(oklch(0.99 0.004 var(--hue)),  oklch(0.19 0.02 var(--hue)));
  --surface:   light-dark(oklch(0.97 0.008 var(--hue)),  oklch(0.235 0.025 var(--hue)));
  --border:    light-dark(oklch(0.90 0.012 var(--hue)),  oklch(0.32 0.03 var(--hue)));
  --text:      light-dark(oklch(0.22 0.025 var(--hue)),  oklch(0.95 0.008 var(--hue)));
  --text-mute: light-dark(oklch(0.48 0.025 var(--hue)),  oklch(0.74 0.02 var(--hue)));

  --ok:   light-dark(oklch(0.62 0.15 150), oklch(0.70 0.15 150));
  --warn: light-dark(oklch(0.72 0.15 75),  oklch(0.78 0.15 75));
  --bad:  light-dark(oklch(0.60 0.19 27),  oklch(0.68 0.19 27));

  --shadow-tint: oklch(0.3 0.1 var(--hue));
  --radius: 12px;
  --radius-ctl: 10px;                  /* buttons and form fields */
  --space: clamp(1rem, 2vw, 1.5rem);
  --section: clamp(3.5rem, 8vw, 6.5rem);
  --max: 68rem;
  --header-h: 4rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }   /* section top lands flush under the header */
body { margin: 0; font: 1.0625rem/1.6 var(--font); color: var(--text); background: var(--bg); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.02em; }
h1 { font-size: clamp(2.2rem, 5.5vw, 3.75rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.2rem; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
h1, h2, h3, .lead, .card p { text-wrap: balance; }
a { color: var(--brand-strong); }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }
.mute { color: var(--text-mute); }
.skip { position: absolute; left: -999px; top: 0; padding: .6rem 1rem; background: var(--bg); z-index: 100; }
.skip:focus { left: 0; }

/* ---------- Layout ---------- */
.wrap { width: min(100% - 2 * var(--space), var(--max)); margin-inline: auto; }
.section { padding-block: var(--section); }
.grid { display: grid; gap: var(--space); grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
@media (min-width: 40rem) { .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .grid--4 { grid-template-columns: repeat(4, 1fr); } }
.split { display: grid; gap: 3rem; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); align-items: center; }
.center { text-align: center; }
.mt { margin-top: 2.5rem; }
.eyebrow { font: 600 .8rem/1 var(--font); letter-spacing: .12em; text-transform: uppercase; color: var(--brand); margin-bottom: 1rem; }
.lead { font-size: 1.25rem; color: var(--text-mute); max-width: 42rem; }
.center .lead, .lead.center { margin-inline: auto; }

/* ---------- Backgrounds: depth ---------- */
.section--alt { position: relative; isolation: isolate; border-block: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface), var(--bg) 95%); }
.section--alt::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .7;
  background-image: radial-gradient(var(--border) 1.2px, transparent 1.3px); background-size: 24px 24px;
  mask-image: radial-gradient(60rem 24rem at 50% 0%, #000, transparent 75%); }
.section--grad { border-block: 1px solid var(--border);
  background:
    radial-gradient(42rem 22rem at 8% 0%, color-mix(in oklch, var(--brand) 26%, transparent), transparent 70%),
    radial-gradient(38rem 20rem at 100% 100%, color-mix(in oklch, oklch(0.6 0.14 290) 18%, transparent), transparent 70%),
    linear-gradient(135deg, var(--brand-soft), var(--bg)); }

/* Dark scope: same tokens, resolved dark. Use on any section. */
.on-dark { color-scheme: dark; --brand: oklch(0.80 0.11 235); --btn-bg: oklch(0.97 0.01 var(--hue)); --on-brand: oklch(0.25 0.07 255);
  position: relative; isolation: isolate; overflow: hidden; color: var(--text);
  background:
    radial-gradient(48rem 30rem at 88% 0%, oklch(0.50 0.14 235 / .55), transparent 65%),
    radial-gradient(40rem 26rem at 0% 100%, oklch(0.40 0.16 285 / .35), transparent 65%),
    linear-gradient(165deg, oklch(0.27 0.075 252), oklch(0.17 0.06 265)); }
.on-dark::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .18;
  background: url("../img/contours.svg") center / cover no-repeat;
  mask-image: linear-gradient(to bottom, #000 30%, transparent 100%); }
@media (prefers-reduced-motion: reduce) { .on-dark::before { background-image: url("../img/contours-static.svg"); } }   /* still copy of the animated waves */
.on-dark a:not(.btn) { color: var(--brand); }
.on-dark .btn { --btn-fill: color-mix(in oklch, var(--btn-bg), black 9%); }
.on-dark .btn--ghost { --btn-fill: oklch(1 0 0 / .12); border-color: oklch(1 0 0 / .3); background: oklch(1 0 0 / .04); }
.on-dark .panel { background: oklch(1 0 0 / .06); border-color: oklch(1 0 0 / .16); backdrop-filter: blur(14px);
  box-shadow: 0 30px 60px -30px oklch(0.1 0.05 260 / .8), inset 0 1px 0 oklch(1 0 0 / .12); }
.on-dark input, .on-dark textarea { background: oklch(0.25 0.05 258 / .86); backdrop-filter: blur(6px); }   /* mostly opaque so background lines never show through */

/* ---------- Components ---------- */
.btn { --x: 50%; --y: 50%;   /* pointer entry/exit point, set by js/site.js */
  --btn-fill: color-mix(in oklch, var(--btn-bg), white 14%);   /* the button's own colour, slightly brighter (as the old hover) */
  position: relative; isolation: isolate; overflow: hidden; display: inline-block; padding: .8em 1.4em; border-radius: var(--radius-ctl);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; background: var(--btn-bg); color: var(--on-brand); border: 1px solid transparent; }
/* Position-aware hover: a circle grows from where the pointer entered and shrinks toward where it left. */
.btn::before { content: ""; position: absolute; z-index: -1; left: var(--x); top: var(--y); width: 260%; aspect-ratio: 1; border-radius: 50%;
  background: var(--btn-fill); transform: translate(-50%, -50%) scale(0); transition: transform .55s cubic-bezier(.2, .7, .2, 1); pointer-events: none; }
@media (hover: hover) { .btn:hover::before { transform: translate(-50%, -50%) scale(1); transition-duration: .9s; } }   /* slower fill on enter; exit uses the .55s above */
.btn--ghost { --btn-fill: color-mix(in oklch, var(--text) 8%, transparent); background: transparent; color: var(--text); border-color: var(--border); }
.btn--sm { padding: .5em 1.1em; font-size: .95rem; }

.card { position: relative; overflow: hidden; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem;
  box-shadow: 0 1px 2px oklch(0.2 0.05 var(--hue) / .06), 0 18px 32px -20px color-mix(in oklch, var(--shadow-tint) 35%, transparent);
  transition: transform .2s ease, box-shadow .2s ease; }
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: linear-gradient(90deg, var(--brand), transparent 80%); opacity: .8; }
.card:hover { transform: translateY(-3px);
  box-shadow: 0 1px 2px oklch(0.2 0.05 var(--hue) / .06), 0 28px 40px -20px color-mix(in oklch, var(--shadow-tint) 45%, transparent); }
.icon svg { width: 1.3rem; height: 1.3rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card .icon { width: 2.5rem; height: 2.5rem; border-radius: var(--radius-ctl); color: var(--brand); display: grid; place-items: center;
  font-size: 1.3rem; margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--brand-soft), color-mix(in oklch, var(--brand) 22%, var(--bg))); }

/* Scroll-triggered reveal. Scrolling a wrapper into view flips --in-view (a scroll-driven animation); that
   un-pauses the card's normal 0.9s timed animation, staggered by column. It runs once, like a trigger, rather
   than scrubbing with the scrollbar. Uses `translate` so the card's hover `transform` still works.
   Without animation-timeline support (or with reduced motion) the cards simply show. */
.reveal-item { display: grid; }
@keyframes in-view { from { --in-view: false; } to { --in-view: true; } }
@keyframes card-in { from { opacity: 0; translate: 0 var(--rise, 3rem); } to { opacity: 1; translate: 0 0; } }
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .reveal-item { --in-view: false; animation: in-view linear both; animation-timeline: view(); animation-range: entry entry 40%; }
    .reveal-item > .card, .reveal-list > li { animation: card-in .9s ease both paused; animation-delay: calc(var(--stagger, 0) * .15s); }
    /* A list reveals the same way: the <ul> is the trigger, each <li> rises in turn. */
    .reveal-list { --in-view: false; --rise: 1.5rem; animation: in-view linear both; animation-timeline: view(); animation-range: entry entry 40%; }
    @container style(--in-view: true) { .reveal-item > .card, .reveal-list > li { animation-play-state: running; } }
  }
}
.reveal-list > :nth-child(2) { --stagger: 1; }
.reveal-list > :nth-child(3) { --stagger: 2; }
.reveal-list > :nth-child(4) { --stagger: 3; }
@media (min-width: 40rem) and (max-width: 63.99rem) { .grid--4 > :nth-child(2n) { --stagger: 1; } }
@media (min-width: 64rem) {
  .grid--4 > :nth-child(4n + 2) { --stagger: 1; }
  .grid--4 > :nth-child(4n + 3) { --stagger: 2; }
  .grid--4 > :nth-child(4n + 4) { --stagger: 3; }
}

.ticks { list-style: none; padding: 0; margin: 1.25rem 0 0; display: grid; gap: .6rem; }
.ticks li { padding-left: 1.7rem; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .5em; width: .9rem; height: .5rem;
  border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand); transform: rotate(-45deg) scale(.9); }

.panel { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 1px 0 var(--border), 0 20px 40px -24px color-mix(in oklch, var(--shadow-tint) 35%, transparent); }
.panel-head { display: flex; justify-content: space-between; gap: 1rem; padding: .75rem 1rem; border-bottom: 1px solid var(--border); font: .8rem var(--mono); color: var(--text-mute); }
.row { display: grid; grid-template-columns: 1fr auto auto; gap: 1rem; padding: .8rem 1rem; border-bottom: 1px solid var(--border); align-items: center; font: .85rem/1.2 var(--mono); }
.row:last-child { border-bottom: 0; }
.pill { padding: .25em .7em; border-radius: 999px; font-size: .75rem; font-weight: 600; color: var(--on-brand); background: var(--ok); }
.pill--warn { background: var(--warn); color: oklch(0.2 0.05 75); }
.pill--bad { background: var(--bad); color: oklch(0.99 0 0); }
pre.code { margin: 0; padding: 1rem 1.25rem; font: .85rem/1.6 var(--mono); overflow-x: auto; }
.k { color: var(--brand); } .s { color: var(--ok); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: var(--space); text-align: center; }
.stat span { display: block; max-width: 24ch; margin-inline: auto; text-wrap: balance; }   /* keeps every stat caption to two lines */
.stat b { display: block; font-size: clamp(1.8rem, 7vw, 2.4rem); white-space: nowrap; letter-spacing: -.03em;
  background: linear-gradient(180deg, var(--brand), var(--brand-strong)); -webkit-background-clip: text; background-clip: text; color: transparent; }

label { display: grid; gap: .35rem; font-size: .9rem; font-weight: 600; }
input, textarea { font: inherit; padding: .75em 1em; border-radius: var(--radius-ctl); border: 1px solid var(--border); background: var(--bg); color: var(--text); }
.form { display: grid; gap: 1rem; max-width: 34rem; margin: 2rem auto 0; text-align: left; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }   /* honeypot */
.notice { max-height: 0; overflow: hidden; opacity: 0; margin: 0 auto; max-width: 34rem; padding: 0 1.1rem; border: 0 solid transparent; border-radius: var(--radius-ctl);
  font-weight: 600; text-align: left; background: oklch(1 0 0 / .1); scroll-margin-top: 6rem; }   /* collapsed, not display:none, so the #sent / #error anchor can scroll to it */
.notice:target { max-height: 10rem; opacity: 1; margin-top: 1.5rem; padding-block: .9rem; border: 1px solid oklch(1 0 0 / .25); }

.consent { position: fixed; inset: auto 1rem 1rem 1rem; z-index: 50; max-width: 40rem; margin-inline: auto; display: flex; flex-wrap: wrap; gap: .75rem 1rem;
  align-items: center; justify-content: space-between; padding: 1rem 1.25rem; background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 24px 48px -24px oklch(0.1 0.05 var(--hue) / .6); font-size: .9rem; }
.consent p { margin: 0; flex: 1 1 18rem; }
.consent div { display: flex; gap: .5rem; }
.consent[hidden] { display: none; }

/* Story band: photo under a dark brand overlay so text stays readable */
.story { color-scheme: dark; color: var(--text); padding-block: clamp(5rem, 12vw, 9rem);
  background:
    linear-gradient(90deg, oklch(0.17 0.06 265 / .94) 0%, oklch(0.17 0.06 265 / .84) 55%, oklch(0.17 0.06 265 / .55) 100%),
    url("../img/how-it-started.jpg") center / cover no-repeat; }
.story-copy { max-width: 40rem; }
.story-copy p { color: oklch(0.90 0.02 var(--hue)); }
.story-copy .lead { color: var(--text); }
.story-line { font-size: 1.25rem; font-weight: 600; color: var(--text) !important; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; gap: 1.5rem; height: var(--header-h); }
.logo { margin-right: auto; font-weight: 800; font-size: 1.4rem; letter-spacing: -.03em; color: var(--text); text-decoration: none; }
.logo span { color: var(--brand); }
.nav { display: flex; gap: 1.5rem; }
.nav a:not(.btn) { color: var(--text-mute); text-decoration: none; font-weight: 500; font-size: .95rem; }
.nav a:not(.btn):hover { color: var(--text); }
.icon-btn { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; padding: 0; background: none; color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-ctl); cursor: pointer; font-size: 1rem; }
.menu-toggle, .nav-cta, .scrim { display: none; }
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after { display: block; content: ""; position: relative; width: 1.1rem; height: 2px; background: currentColor; border-radius: 1px; }
.menu-toggle span::before { position: absolute; top: -6px; }
.menu-toggle span::after { position: absolute; top: 6px; }

@media (max-width: 40rem) {
  .site-header { backdrop-filter: none; background: var(--bg); }   /* a backdrop filter would trap the fixed fly-out */
  .site-header .wrap > .btn { display: none; }
  .menu-toggle { display: grid; }
  .nav { position: fixed; inset: 0 0 0 auto; z-index: 30; width: min(20rem, 85vw); flex-direction: column; gap: .25rem; padding: 5rem 1.5rem 1.5rem;
    background: var(--surface); border-left: 1px solid var(--border); box-shadow: -24px 0 48px -24px oklch(0.1 0.05 var(--hue) / .5);
    transform: translateX(100%); visibility: hidden; transition: transform .25s ease, visibility 0s .25s; }
  .nav a:not(.btn) { font-size: 1.15rem; padding: .75rem 0; border-bottom: 1px solid var(--border); color: var(--text); }
  .nav .nav-cta { display: inline-block; margin-top: 1.5rem; text-align: center; }
  .scrim { display: block; position: fixed; inset: 0; z-index: 20; background: oklch(0.1 0.03 var(--hue) / .55);
    opacity: 0; pointer-events: none; transition: opacity .25s ease; }
  .menu-open { overflow: hidden; }
  .menu-open .nav { transform: none; visibility: visible; transition: transform .25s ease; }
  .menu-open .scrim { opacity: 1; pointer-events: auto; }
}

/* ---------- Sections ---------- */
.hero { padding-block: clamp(4rem, 10vw, 7.5rem) clamp(4rem, 8vw, 6rem); }
.hero h1 em { font-style: normal; color: oklch(0.80 0.11 235); }
.hero .actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.hero .note { margin-top: 3rem; font-size: .9rem; }

.ribbon { position: relative; color: oklch(0.99 0 0); background: linear-gradient(90deg, oklch(0.56 0.12 238), oklch(0.62 0.12 225));
  box-shadow: 0 10px 30px -12px oklch(0.45 0.12 240 / .6); }
.ribbon .wrap { display: flex; flex-wrap: wrap; gap: .5rem 2.5rem; justify-content: center; padding-block: 1rem; font-weight: 600; font-size: .95rem; }
.ribbon span::before { content: "\25C6"; margin-right: .6rem; font-size: .6rem; opacity: .7; vertical-align: middle; }

.footer { padding-block: 2.5rem; border-top: 1px solid var(--border); font-size: .9rem; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; }

/* Legal / text pages */
.prose { max-width: 46rem; padding-block: 3rem var(--section); }
.prose h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
.prose h2 { font-size: 1.35rem; margin-top: 2rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .nav, .scrim, .btn::before, .btn:hover::before { transition: none; }
  .card:hover { transform: none; }
}