/* Responsibility Switch — Landing (v1)
   Aesthetic: luxury minimalism / calm authority
*/

:root{
  --bg0:#06060b;
  --bg1:#0b0b14;
  --violet:#6b4cff;
  --violet2:#b14cff;
  --text:#f1f1f6;
  --muted: rgba(241,241,246,.68);
  --faint: rgba(241,241,246,.12);
  --faint2: rgba(241,241,246,.08);
  --shadow: rgba(0,0,0,.55);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  color:var(--text);
  font-family: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  background:
    radial-gradient(900px 520px at 50% 48%,
      rgba(107,76,255,.24) 0%,
      rgba(177,76,255,.10) 28%,
      rgba(10,10,18,0) 62%),
    radial-gradient(1200px 700px at 50% 60%,
      rgba(107,76,255,.10) 0%,
      rgba(6,6,11,0) 60%),
    linear-gradient(180deg, var(--bg0) 0%, var(--bg1) 65%, #070712 100%);
  overflow-x:hidden;
}

/* soft vignette */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(1400px 800px at 50% 55%,
      rgba(0,0,0,0) 0%,
      rgba(0,0,0,.35) 55%,
      rgba(0,0,0,.72) 100%);
}

.wrap{
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: clamp(28px, 4vw, 60px);
  position:relative;
}

.card{
  width:min(860px, 100%);
  text-align:center;
  padding: clamp(24px, 3.5vw, 44px);
}

.headline{
  margin: 0 0 14px;
  font-weight: 500;
  letter-spacing: -0.02em;
  font-size: clamp(42px, 4.8vw, 74px);
  line-height: 1.08;
  text-shadow: 0 14px 42px rgba(0,0,0,.55);
}

.headline .on{
  font-weight: 650;
}

.subline{
  margin: 0 auto 34px;
  max-width: 36ch;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  font-size: clamp(16px, 1.6vw, 20px);
  letter-spacing: 0.02em;
  line-height: 1.55;
}

.cta{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap: 10px;
  margin-bottom: 26px;
}

.switch{
  width: 128px;
  height: 128px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.55);
  background: rgba(255,255,255,.96);
  color: #0c0c12;
  display:grid;
  place-items:center;
  cursor:pointer;
  padding:0;
  user-select:none;

  /* FLAT: no shadows, no bevels */
  box-shadow: none;
  outline: none;

  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.switch__label{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: 28px;
}

.switch:focus-visible{
  outline: 2px solid rgba(107,76,255,.75);
  outline-offset: 6px;
}

.switch:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.98);
  border-color: rgba(255,255,255,.8);
}

.switch:active{
  transform: translateY(0px) scale(.99);
}

.hint{
  min-height: 1.2em;
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(241,241,246,.45);
}

.checks{
  list-style:none;
  padding: 0;
  margin: 18px auto 34px;
  width: min(560px, 100%);
  color: rgba(241,241,246,.62);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  font-size: 16px;
  line-height: 1.6;
}

.checks li{
  display:flex;
  align-items:flex-start;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--faint2);
}

.checks li:first-child{
  border-top: 1px solid var(--faint);
}

.checks li::before{
  content:"✓";
  font-weight: 900;
  color: rgba(241,241,246,.52);
  line-height: 1;
  margin-top: 2px;
}

.footer{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: rgba(241,241,246,.42);
}

.footer a{
  color: rgba(241,241,246,.50);
  text-decoration:none;
  transition: color 120ms ease, text-decoration-color 120ms ease;
}

.footer a:hover{
  color: rgba(241,241,246,.78);
  text-decoration: underline;
  text-decoration-color: rgba(241,241,246,.28);
  text-underline-offset: 4px;
}

.sep{
  margin: 0 10px;
  color: rgba(241,241,246,.22);
}

@media (max-width: 420px){
  .switch{ width: 112px; height: 112px; }
  .switch__label{ font-size: 24px; }
  .checks{ font-size: 15px; }
}


/* utility */
.backlink{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: rgba(241,241,246,.58);
  text-decoration:none;
  border-bottom: 1px solid rgba(241,241,246,.18);
  padding-bottom: 3px;
}
.backlink:hover{
  color: rgba(241,241,246,.82);
  border-bottom-color: rgba(241,241,246,.34);
}

.prose{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: rgba(241,241,246,.64);
  line-height: 1.7;
  max-width: 70ch;
  margin: 0 auto;
  text-align: left;
}
.prose p{ margin: 0 0 14px; }
.prose strong{ color: rgba(241,241,246,.86); }