/* Castle Entropy — castlentropy.com. Premium, restrained, trustworthy. */
:root {
  --bg: #0a0c10;
  --bg-soft: #11151c;
  --panel: #151a23;
  --line: #232b38;
  --ink: #e8edf4;
  --ink-dim: #9aa7b8;
  --ink-faint: #65728a;
  --accent: #6ea8fe;
  --accent-2: #8be0c8;
  --warn: #f0b357;
  --radius: 14px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
/* Ensure the [hidden] attribute always wins, even over display:grid forms. */
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 70% -10%, #16202e 0%, var(--bg) 55%) no-repeat, var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Header */
header.site {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(10, 12, 16, 0.72);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; letter-spacing: 0.2px; }
.brand .mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; color: #06121f; font-weight: 800; font-family: var(--mono);
}
.brand small { color: var(--ink-faint); font-weight: 400; }
.nav nav a { color: var(--ink-dim); margin-left: 22px; font-size: 0.94rem; }
.nav nav a:hover { color: var(--ink); text-decoration: none; }
.btn {
  display: inline-block; padding: 11px 18px; border-radius: 10px; font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06121f;
  border: none; cursor: pointer;
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }

/* Hero */
.hero { padding: 88px 0 56px; }
.eyebrow {
  display: inline-block; font-family: var(--mono); font-size: 0.78rem; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--accent-2); border: 1px solid var(--line);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08; margin: 0 0 18px; letter-spacing: -0.5px; }
.hero p.lede { font-size: 1.2rem; color: var(--ink-dim); max-width: 720px; margin: 0 0 30px; }
.tagline { font-family: var(--mono); color: var(--ink-faint); margin-top: 28px; font-size: 0.92rem; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* Sections */
section { padding: 56px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 1.7rem; margin: 0 0 10px; letter-spacing: -0.3px; }
section .sub { color: var(--ink-dim); max-width: 720px; margin: 0 0 32px; }

/* Grid cards */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 1.06rem; }
.card p { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }
.card .ix { font-family: var(--mono); color: var(--accent); font-size: 0.8rem; }

/* Two columns: does / doesn't */
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 720px) { .cols { grid-template-columns: 1fr; } }
.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: 8px 0 8px 28px; position: relative; color: var(--ink-dim); border-bottom: 1px solid var(--line); }
.list li:last-child { border-bottom: none; }
.list.yes li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 700; }
.list.no li::before { content: "—"; position: absolute; left: 0; color: var(--warn); font-weight: 700; }

/* States row */
.states { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.state { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.state b { display: block; font-family: var(--mono); color: var(--accent); margin-bottom: 4px; }
.state span { font-size: 0.9rem; color: var(--ink-dim); }

/* FAQ */
details.faq { border: 1px solid var(--line); border-radius: 12px; padding: 0 18px; margin-bottom: 12px; background: var(--panel); }
details.faq summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq[open] summary { border-bottom: 1px solid var(--line); }
details.faq p { color: var(--ink-dim); }

/* Callout */
.callout {
  background: linear-gradient(135deg, rgba(110,168,254,0.08), rgba(139,224,200,0.06));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
}
.callout .small { color: var(--ink-faint); font-size: 0.86rem; }

/* Forms */
form.pilot { display: grid; gap: 14px; max-width: 560px; }
form.pilot label { font-size: 0.9rem; color: var(--ink-dim); display: grid; gap: 6px; }
form.pilot input, form.pilot textarea, form.pilot select {
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--ink);
  border-radius: 10px; padding: 11px 13px; font: inherit;
}
form.pilot input:focus, form.pilot textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }

/* Footer */
footer.site { border-top: 1px solid var(--line); padding: 40px 0; color: var(--ink-faint); font-size: 0.9rem; }
footer.site .cols2 { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
footer.site a { color: var(--ink-dim); }
.legal { margin-top: 18px; font-size: 0.8rem; color: var(--ink-faint); max-width: 760px; }

code, .mono { font-family: var(--mono); }
.kbd { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 6px; padding: 2px 7px; font-family: var(--mono); font-size: 0.82rem; }

/* ============================================================
   Vault intro animation
   ============================================================ */
body.vault-locked { overflow: hidden; }
#vault {
  position: fixed; inset: 0; z-index: 1000;
  background: radial-gradient(1000px 700px at 50% 40%, #10151d 0%, #05070a 70%);
  perspective: 1600px;
  display: grid; place-items: center;
  overflow: hidden;
}
#vault[hidden] { display: none; }
.vault-stage { position: absolute; inset: 0; transform-style: preserve-3d; }
.leaf {
  position: absolute; top: 0; bottom: 0; width: 50%;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.018) 0 2px, transparent 2px 22px),
    linear-gradient(160deg, #1b222d 0%, #0e131b 60%, #0a0e14 100%);
  border-color: var(--line);
  transition: transform 1.25s cubic-bezier(0.7, 0, 0.2, 1), opacity 1.25s ease;
  will-change: transform;
  box-shadow: inset 0 0 120px rgba(0,0,0,0.6);
}
.leaf.left { left: 0; transform-origin: left center; border-right: 1px solid #000; }
.leaf.right { right: 0; transform-origin: right center; border-left: 1px solid #000; }
/* Rivets along the seam */
.leaf::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 14px;
  background-image: radial-gradient(circle, #2c3645 38%, transparent 40%);
  background-size: 14px 46px; background-repeat: repeat-y; opacity: 0.7;
}
.leaf.left::after { right: 6px; }
.leaf.right::after { left: 6px; }

.vault-dial {
  position: absolute; top: 50%; left: 50%; width: 190px; height: 190px;
  margin: -95px 0 0 -95px; border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, #222c39 0%, #131922 60%, #0c1118 100%);
  border: 3px solid #2f3a49;
  box-shadow: 0 18px 60px rgba(0,0,0,0.7), inset 0 0 30px rgba(0,0,0,0.7);
  display: grid; place-items: center; z-index: 2;
  transition: transform 1.0s cubic-bezier(0.6,0,0.2,1), opacity 0.8s ease;
}
.vault-dial::before {
  content: ""; position: absolute; width: 64%; height: 64%; border-radius: 50%;
  border: 2px dashed #3a4658;
}
.vault-spokes { position: absolute; width: 230px; height: 230px; }
.vault-spokes span {
  position: absolute; top: 50%; left: 50%; width: 96px; height: 8px; margin: -4px 0 0 -4px;
  background: linear-gradient(90deg, #39465a, #1a212c); border-radius: 6px; transform-origin: 4px 4px;
}
.vault-spokes span:nth-child(2) { transform: rotate(90deg); }
.vault-spokes span:nth-child(3) { transform: rotate(180deg); }
.vault-spokes span:nth-child(4) { transform: rotate(270deg); }
.vault-mark { font-family: var(--mono); font-weight: 800; color: var(--accent-2); font-size: 1.4rem; z-index: 3; }
.vault-cap {
  position: absolute; bottom: 14%; left: 0; right: 0; text-align: center;
  color: var(--ink-faint); font-family: var(--mono); font-size: 0.8rem; letter-spacing: 2px;
}
.vault-skip {
  position: absolute; top: 18px; right: 18px; z-index: 4;
  background: transparent; color: var(--ink-faint); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 12px; cursor: pointer; font: inherit; font-size: 0.82rem;
}
.vault-skip:hover { color: var(--ink); }

/* Idle spin before opening */
@keyframes dial-spin { from { transform: rotate(0); } to { transform: rotate(-120deg); } }
body.vault-locked .vault-dial { animation: dial-spin 0.65s cubic-bezier(0.5,0,0.3,1) forwards; }

/* Opening sequence */
body.vault-opening .vault-dial { transform: rotate(-300deg) scale(0.6); opacity: 0; }
body.vault-opening .vault-spokes { opacity: 0; transition: opacity 0.5s ease; }
body.vault-opening .leaf.left { transform: rotateY(-105deg); opacity: 0.25; }
body.vault-opening .leaf.right { transform: rotateY(105deg); opacity: 0.25; }
body.vault-opening #vault { background: transparent; transition: background 1.2s ease; }
body.vault-opening .vault-cap { opacity: 0; transition: opacity 0.4s ease; }

/* Hero entrance once the vault is open */
.hero .reveal-hero { opacity: 0; transform: translateY(18px); }
body.vault-open .hero .reveal-hero,
body:not(.vault-locked):not(.vault-opening) .hero .reveal-hero {
  opacity: 1; transform: none;
  transition: opacity 0.9s ease 0.1s, transform 0.9s cubic-bezier(0.2,0.7,0.2,1) 0.1s;
}

/* ============================================================
   Scroll reveals + card glow
   ============================================================ */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2,0.7,0.2,1); }
[data-reveal].revealed { opacity: 1; transform: none; }

.card, .state { position: relative; overflow: hidden; }
.card::before, .state::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity 0.4s ease;
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 50%), rgba(110,168,254,0.12), transparent 60%);
}
.card:hover, .state:hover { border-color: #33405a; transform: translateY(-2px); transition: border-color 0.3s ease, transform 0.3s ease; }
.card:hover::before, .state:hover::before { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .leaf, .vault-dial, [data-reveal], .hero .reveal-hero { transition: none !important; animation: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ============================================================
   Account UI
   ============================================================ */
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--bg-soft); }
.seg-btn { background: transparent; color: var(--ink-dim); border: none; padding: 9px 18px; font: inherit; cursor: pointer; }
.seg-btn.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #06121f; font-weight: 600; }
.formmsg { min-height: 1.2em; margin: 12px 0 0; font-size: 0.92rem; }
.formmsg.err { color: #ff9b9b; }
.formmsg.ok { color: var(--accent-2); }
.ix { font-family: var(--mono); color: var(--accent); font-size: 0.72rem; letter-spacing: 1px; margin-right: 8px; }

.seal-badge {
  display: inline-block; font-family: var(--mono); font-weight: 800; letter-spacing: 4px;
  color: var(--accent-2); border: 2px solid var(--accent-2); border-radius: 10px;
  padding: 8px 16px; transform: rotate(-6deg); opacity: 0.92;
}
@keyframes seal-stamp {
  0% { transform: rotate(-6deg) scale(2.4); opacity: 0; }
  60% { transform: rotate(-6deg) scale(0.92); opacity: 1; }
  100% { transform: rotate(-6deg) scale(1); opacity: 0.92; }
}
body.sealing .seal-badge { animation: seal-stamp 0.7s cubic-bezier(0.2,0.8,0.2,1) both; }
@media (prefers-reduced-motion: reduce) { body.sealing .seal-badge { animation: none; } }