/* ============================================================================
   KeyKoin landing — self-contained design system
   Dark (#09090d) + purple (#731FFB). No external dependencies (fonts/icons
   are system / inline SVG). Used only by the root index.html landing page.
   ========================================================================== */

:root {
  --bg: #09090d;
  --bg-2: #0d0d15;
  --card: #111019;
  --card-2: #15131f;
  --border: rgba(255, 255, 255, .08);
  --border-2: rgba(255, 255, 255, .12);
  --text: #ECECF2;
  --muted: #9aa0ad;
  --muted-2: #6b7180;
  --purple: #731FFB;
  --purple-2: #9b5cff;
  --purple-3: #651be1;
  --glow: rgba(115, 31, 251, .35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.kk-container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---- ambient background ---- */
.kk-bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60rem 40rem at 70% -10%, rgba(115, 31, 251, .18), transparent 60%),
    radial-gradient(45rem 35rem at 10% 10%, rgba(101, 27, 225, .12), transparent 55%),
    var(--bg);
}
.kk-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
}

/* ---- nav ---- */
.kk-nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(9, 9, 13, .72);
  border-bottom: 1px solid var(--border);
}
.kk-nav .kk-container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.kk-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; letter-spacing: -.02em; }
.kk-brand img { height: 34px; width: auto; }
.kk-navlinks { display: flex; align-items: center; gap: 30px; }
.kk-navlinks a { color: var(--muted); font-size: .95rem; transition: color .2s; }
.kk-navlinks a:hover { color: var(--text); }
.kk-nav-cta { display: flex; align-items: center; gap: 12px; }

/* ---- buttons ---- */
.kk-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 12px; font-weight: 600; font-size: .95rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .2s, background .2s, border-color .2s;
  white-space: nowrap;
}
.kk-btn-primary { background: var(--purple); color: #fff; box-shadow: 0 8px 24px -8px var(--glow); }
.kk-btn-primary:hover { background: var(--purple-3); transform: translateY(-1px); box-shadow: 0 12px 30px -8px var(--glow); }
.kk-btn-ghost { background: rgba(255, 255, 255, .04); color: var(--text); border-color: var(--border-2); }
.kk-btn-ghost:hover { background: rgba(255, 255, 255, .08); transform: translateY(-1px); }
.kk-btn-lg { padding: 14px 26px; font-size: 1rem; border-radius: 14px; }

/* ---- hero ---- */
.kk-hero { padding: 96px 0 72px; text-align: center; }
.kk-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: .82rem; color: var(--muted);
  background: rgba(255, 255, 255, .04); border: 1px solid var(--border); margin-bottom: 28px;
}
.kk-pill .dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 8px #4ade80; }
.kk-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.4rem); line-height: 1.05; letter-spacing: -.03em; font-weight: 800;
  max-width: 18ch; margin: 0 auto 22px;
}
.kk-grad {
  background: linear-gradient(90deg, var(--purple-2) 0%, var(--purple) 55%, var(--purple-3) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.kk-hero p { font-size: clamp(1rem, 2.2vw, 1.25rem); color: var(--muted); max-width: 56ch; margin: 0 auto 36px; }
.kk-hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---- section heading ---- */
.kk-section { padding: 72px 0; }
.kk-head { text-align: center; max-width: 60ch; margin: 0 auto 52px; }
.kk-eyebrow { color: var(--purple-2); font-weight: 700; font-size: .82rem; letter-spacing: .14em; text-transform: uppercase; }
.kk-head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -.02em; margin: 12px 0 14px; font-weight: 800; }
.kk-head p { color: var(--muted); font-size: 1.05rem; }

/* ---- feature grid ---- */
.kk-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.kk-card {
  background: linear-gradient(180deg, var(--card-2), var(--card));
  border: 1px solid var(--border); border-radius: 18px; padding: 28px 26px;
  transition: transform .2s, border-color .2s, box-shadow .25s; position: relative; overflow: hidden;
}
.kk-card:hover { transform: translateY(-4px); border-color: rgba(115, 31, 251, .45); box-shadow: 0 18px 40px -22px var(--glow); }
.kk-card-icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: rgba(115, 31, 251, .14); border: 1px solid rgba(115, 31, 251, .3); color: var(--purple-2);
}
.kk-card-icon svg { width: 24px; height: 24px; }
.kk-card h3 { font-size: 1.15rem; margin-bottom: 8px; letter-spacing: -.01em; }
.kk-card p { color: var(--muted); font-size: .95rem; }

/* ---- highlight band ---- */
.kk-band {
  background: linear-gradient(180deg, rgba(115, 31, 251, .08), rgba(115, 31, 251, .02));
  border: 1px solid var(--border); border-radius: 24px; padding: 48px; text-align: center;
}
.kk-band h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); letter-spacing: -.02em; margin-bottom: 14px; font-weight: 800; }
.kk-band p { color: var(--muted); max-width: 60ch; margin: 0 auto 28px; }

/* ---- footer ---- */
.kk-footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 56px 0 36px; }
.kk-footcols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; }
.kk-footbrand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; margin-bottom: 14px; }
.kk-footbrand img { height: 30px; }
.kk-footcols p { color: var(--muted); font-size: .92rem; max-width: 36ch; }
.kk-footcol h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--muted-2); margin-bottom: 16px; }
.kk-footcol a { display: block; color: var(--muted); font-size: .92rem; margin-bottom: 11px; transition: color .2s; }
.kk-footcol a:hover { color: var(--text); }
.kk-foot-bottom { border-top: 1px solid var(--border); margin-top: 40px; padding-top: 26px; text-align: center; color: var(--muted-2); font-size: .86rem; }
.kk-social { display: flex; gap: 14px; margin-top: 18px; }
.kk-social a { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: rgba(255, 255, 255, .04); border: 1px solid var(--border); color: var(--muted); transition: all .2s; }
.kk-social a:hover { color: #fff; border-color: rgba(115, 31, 251, .45); background: rgba(115, 31, 251, .12); }
.kk-social svg { width: 18px; height: 18px; }

/* ---- reveal-on-scroll ---- */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s ease; }

/* ---- mobile ---- */
.kk-burger { display: none; background: none; border: 0; color: var(--text); cursor: pointer; }
@media (max-width: 860px) {
  .kk-navlinks { display: none; }
  .kk-grid { grid-template-columns: 1fr; }
  .kk-footcols { grid-template-columns: 1fr 1fr; gap: 28px; }
  .kk-band { padding: 36px 22px; }
  .kk-hero { padding: 64px 0 48px; }
}