/* ============================================================================
   Ledgerline — global design system
   Blurple register, Söhne-like grotesque (Hanken Grotesk), diagonal gradients.
   ========================================================================== */

:root {
  /* Brand */
  --blurple: #635bff;
  --blurple-600: #533afd;
  --blurple-700: #4a3fd6;
  --blurple-050: #f4f3ff;
  --navy: #0a2540;
  --navy-700: #163257;
  --navy-500: #2a3f5c;

  /* Neutrals */
  --ink: #0a2540;
  --slate: #425466;
  --slate-400: #58698a;
  --slate-300: #8792a2;
  --hairline: #e3e8ee;
  --hairline-2: #eef1f6;
  --bg: #ffffff;
  --bg-tint: #f6f9fc;
  --bg-tint-2: #eef4fb;

  /* Accents */
  --cyan: #21d4fd;
  --pink: #ff5996;
  --teal: #24b47e;
  --green: #15be53;
  --amber: #ffbb00;
  --red: #df1b41;

  /* Code / dark */
  --code-bg: #0a2540;
  --code-bg-2: #0b1a2e;
  --code-ink: #e6edf6;
  --code-mute: #7a8db3;
  --code-str: #7dd3a8;
  --code-key: #8ab4ff;
  --code-num: #f5a97f;
  --code-punc: #9db3d6;

  /* Type */
  --sans: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* Rhythm */
  --maxw: 1080px;
  --maxw-wide: 1200px;
  --radius: 14px;
  --radius-sm: 9px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(10,37,64,.06), 0 2px 6px rgba(10,37,64,.05);
  --shadow: 0 4px 8px rgba(10,37,64,.06), 0 12px 28px rgba(10,37,64,.10);
  --shadow-lg: 0 8px 20px rgba(10,37,64,.10), 0 30px 60px rgba(10,37,64,.14);
  --shadow-blurple: 0 6px 16px rgba(99,91,255,.28), 0 20px 40px rgba(99,91,255,.18);

  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  color: var(--slate);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 { color: var(--ink); line-height: 1.08; letter-spacing: -0.021em; font-weight: 640; overflow-wrap: break-word; }
h1 { font-size: clamp(2.1rem, 6.2vw, 4.1rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.85rem); letter-spacing: -0.026em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 { font-size: 1.06rem; }

a { color: var(--blurple-600); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--blurple-700); }

p { color: var(--slate); }
img, svg, canvas { display: block; max-width: 100%; }

::selection { background: rgba(99,91,255,.22); }

/* ---- Layout helpers ---- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: var(--maxw-wide); }
.section { padding: clamp(64px, 9vw, 130px) 0; }
.section-sm { padding: clamp(48px, 6vw, 84px) 0; }
.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blurple-600);
  font-weight: 600;
  margin-bottom: 18px;
}
.eyebrow.on-dark { color: var(--cyan); }
.lead { font-size: clamp(1.06rem, 1.5vw, 1.24rem); color: var(--slate); max-width: 60ch; }
.muted { color: var(--slate-300); }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: 15.5px;
  padding: 11px 20px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .16s var(--ease), box-shadow .2s var(--ease), background .16s var(--ease), color .16s;
  white-space: nowrap; line-height: 1;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blurple); color: #fff; box-shadow: 0 1px 2px rgba(10,37,64,.18); }
.btn-primary:hover { background: var(--blurple-600); color: #fff; box-shadow: var(--shadow-blurple); transform: translateY(-1px); }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: #14344f; color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-ghost { background: rgba(99,91,255,.08); color: var(--blurple-600); }
.btn-ghost:hover { background: rgba(99,91,255,.14); color: var(--blurple-700); }
.btn-white { background: #fff; color: var(--navy); box-shadow: var(--shadow-sm); }
.btn-white:hover { transform: translateY(-1px); box-shadow: var(--shadow); color: var(--navy); }
.btn-lg { font-size: 16.5px; padding: 14px 26px; }
.btn .arw { transition: transform .18s var(--ease); }
.btn:hover .arw { transform: translateX(3px); }
.link-arrow { font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.link-arrow .arw { transition: transform .18s var(--ease); }
.link-arrow:hover .arw { transform: translateX(3px); }

/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: 60;
  transition: background .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(255,255,255,.86); backdrop-filter: saturate(180%) blur(14px); border-bottom-color: var(--hairline); }
.nav-inner { display: flex; align-items: center; gap: 28px; height: 66px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 20px; color: var(--navy); letter-spacing: -0.03em; }
.brand:hover { color: var(--navy); }
.brand .mark { width: 26px; height: 26px; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav-links a { color: var(--navy); font-weight: 550; font-size: 15px; padding: 8px 12px; border-radius: 8px; transition: background .15s, color .15s; }
.nav-links a:hover { background: rgba(10,37,64,.05); color: var(--navy); }
.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.nav-cta a.txt { color: var(--navy); font-weight: 600; font-size: 15px; padding: 8px 10px; }
.nav-cta a.txt:hover { color: var(--blurple-600); }
.nav-burger { display: none; margin-left: auto; background: none; border: 0; padding: 8px; cursor: pointer; color: var(--navy); }
.mobile-menu { display: none; }

@media (max-width: 860px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: inline-flex; }
  .mobile-menu {
    display: block; position: fixed; inset: 66px 0 0 0; z-index: 55;
    background: #fff; padding: 20px 24px 40px; overflow-y: auto;
    transform: translateX(100%); transition: transform .3s var(--ease); visibility: hidden;
  }
  .mobile-menu.open { transform: translateX(0); visibility: visible; }
  .mobile-menu a { display: block; padding: 15px 4px; font-size: 20px; font-weight: 600; color: var(--navy); border-bottom: 1px solid var(--hairline-2); }
  .mobile-menu .mm-cta { margin-top: 22px; display: grid; gap: 10px; }
  .mobile-menu .mm-cta .btn { justify-content: center; }
  body.menu-open { overflow: hidden; }
}

/* ---- Footer ---- */
.footer { background: var(--navy); color: #b9c6d9; padding: 74px 0 40px; }
.footer a { color: #b9c6d9; font-size: 14.5px; }
.footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 36px 28px; }
.footer h5 { color: #fff; font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; font-family: var(--mono); margin-bottom: 16px; font-weight: 600; }
.footer-col ul { list-style: none; padding: 0; display: grid; gap: 11px; }
.footer-brand .brand { color: #fff; }
.footer-brand p { color: #8296b0; font-size: 14.5px; margin-top: 14px; max-width: 30ch; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 56px; padding-top: 26px; border-top: 1px solid rgba(255,255,255,.1); color: #6f83a0; font-size: 13.5px; }
.footer-bottom .fb-links { display: flex; gap: 20px; flex-wrap: wrap; }
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 20px; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ---- Gradient hero canvas ---- */
.grad-wrap { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.grad-skew {
  position: absolute; left: -12%; right: -12%; top: -46%; bottom: -8%;
  transform: skewY(-12deg); transform-origin: 0 0; overflow: hidden;
}
.grad-mesh {
  position: absolute; inset: -8%;
  background:
    radial-gradient(42% 55% at 18% 22%, #7c6bff 0%, rgba(124,107,255,0) 60%),
    radial-gradient(46% 60% at 82% 18%, #21d4fd 0%, rgba(33,212,253,0) 58%),
    radial-gradient(50% 60% at 62% 88%, #ff5996 0%, rgba(255,89,150,0) 62%),
    radial-gradient(60% 70% at 20% 92%, #635bff 0%, rgba(99,91,255,0) 60%),
    linear-gradient(120deg, #f6d5ff 0%, #d5e6ff 40%, #c9f4ff 100%);
}
/* Optional gentle drift, enabled by JS only on devices that render it smoothly
   (see app.js). Off by default so first paint is instant and perf holds. */
.grad-animate .grad-mesh { animation: meshdrift 30s ease-in-out infinite alternate; }
@keyframes meshdrift {
  0%   { transform: translate3d(-1.5%, -1%, 0); }
  100% { transform: translate3d(1.5%, 1.5%, 0); }
}
@media (prefers-reduced-motion: reduce) { .grad-mesh { animation: none; } }
.grad-fade-bottom { position: absolute; left: 0; right: 0; bottom: 0; height: 30%; background: linear-gradient(to bottom, transparent, #fff); z-index: 1; }

/* ---- Cards ---- */
.card { background: #fff; border: 1px solid var(--hairline); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.pill {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600;
  padding: 4px 11px; border-radius: 999px; font-family: var(--mono); letter-spacing: .01em;
}
.pill-blurple { background: var(--blurple-050); color: var(--blurple-600); }
.pill-green { background: rgba(21,190,83,.12); color: #0e9f43; }
.pill-amber { background: rgba(255,187,0,.16); color: #a9781a; }
.pill-red { background: rgba(223,27,65,.1); color: var(--red); }
.pill-slate { background: #eef1f6; color: var(--slate-400); }
.pill-cyan { background: rgba(33,150,243,.12); color: #1a73c7; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; display: inline-block; }

/* ---- Code block (marketing) ---- */
.codepane { background: var(--code-bg); border-radius: var(--radius); box-shadow: var(--shadow-lg); overflow: hidden; }
.codepane-head { display: flex; align-items: center; gap: 8px; padding: 13px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.codepane-head .tab { font-family: var(--mono); font-size: 12.5px; color: var(--code-mute); padding: 4px 10px; border-radius: 7px; cursor: pointer; }
.codepane-head .tab.active { color: #fff; background: rgba(255,255,255,.08); }
.codepane pre { margin: 0; padding: 20px 22px; overflow-x: auto; font-family: var(--mono); font-size: 13.5px; line-height: 1.75; color: var(--code-ink); }
.codepane .tok-key { color: var(--code-key); }
.codepane .tok-str { color: var(--code-str); }
.codepane .tok-num { color: var(--code-num); }
.codepane .tok-punc { color: var(--code-punc); }
.codepane .tok-cmt { color: var(--code-mute); font-style: italic; }
.codepane .tok-flag { color: #c9a2ff; }

/* dividers / bands */
.band-tint { background: var(--bg-tint); }
.band-navy { background: var(--navy); color: #cdd8e8; }
.band-navy h1, .band-navy h2, .band-navy h3, .band-navy h4 { color: #fff; }
.band-navy p { color: #a9b8ce; }
.diag-top { position: relative; }
.hairline { height: 1px; background: var(--hairline); border: 0; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

.tnum { font-variant-numeric: tabular-nums; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--navy); color: #fff; padding: 12px 18px; border-radius: 10px; font-size: 14.5px;
  box-shadow: var(--shadow-lg); z-index: 200; opacity: 0; transition: opacity .25s, transform .25s; pointer-events: none;
  display: flex; align-items: center; gap: 9px;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }