/* The Cursed Library — Proof of Solve. Gothic-library theme, deliberately dark-first
   (the series is horror-adjacent puzzle fiction); a legible light override is provided
   for prefers-color-scheme / OS-level light mode so the page still reads well there. */

:root {
  --ink: #0e0b10;
  --ink-2: #161119;
  --panel: #1b1420;
  --parchment: #e9e1d4;
  --parchment-dim: #a89a86;
  --gold: #c9a24b;
  --gold-dim: #8a723a;
  --burgundy: #6e1f1f;
  --line: #3a2f38;
  --danger: #8a3a3a;
  --ok: #4a7a5a;
  --font-display: 'Cinzel', Georgia, 'Times New Roman', serif;
  --font-body: 'Crimson Text', Georgia, 'Times New Roman', serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --ink: #f3ede1;
    --ink-2: #ece3d3;
    --panel: #fffdf8;
    --parchment: #241c1a;
    --parchment-dim: #5b4d42;
    --gold: #7a5a1e;
    --gold-dim: #9c7a2e;
    --burgundy: #7a2323;
    --line: #d8cdb8;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--parchment);
  font-family: var(--font-body);
  min-height: 100%;
}

body {
  background-image:
    radial-gradient(ellipse at 50% -10%, rgba(201,162,75,0.08), transparent 60%),
    linear-gradient(var(--ink), var(--ink-2));
  line-height: 1.55;
  overflow-x: hidden;
}

.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  box-shadow: inset 0 0 18vw rgba(0,0,0,0.65);
}
@media (prefers-color-scheme: light) {
  .vignette { box-shadow: inset 0 0 12vw rgba(0,0,0,0.10); }
}

main, header, footer { position: relative; z-index: 1; }

a { color: var(--gold); }

.site-header {
  text-align: center;
  padding: 4rem 1.5rem 2rem;
}
.ornament {
  color: var(--gold-dim);
  font-size: 1.4rem;
  letter-spacing: 0.6em;
  margin-bottom: 0.75rem;
}
.site-header h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: 0.06em;
  color: var(--gold);
  margin: 0;
  text-shadow: 0 0 24px rgba(201,162,75,0.25);
}
.tagline {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--parchment-dim);
  margin-top: 0.6rem;
}

main { max-width: 880px; margin: 0 auto; padding: 0 1.25rem 4rem; }

.intro { text-align: center; max-width: 640px; margin: 0 auto 3rem; font-size: 1.15rem; }
.intro-sub { color: var(--parchment-dim); font-style: italic; font-size: 1rem; }

h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-align: center;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0 1.5rem;
}
h2 .rule { flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--line), transparent); }

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}
.book-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color 0.2s, transform 0.2s;
}
.book-card:hover { border-color: var(--gold-dim); transform: translateY(-2px); }
.book-card h3 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  margin: 0;
  color: var(--parchment);
}
.book-card p { margin: 0; font-style: italic; color: var(--parchment-dim); font-size: 0.95rem; flex: 1; }
.book-card button {
  align-self: flex-start;
  background: none;
  border: 1px solid var(--gold-dim);
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.9rem;
  border-radius: 3px;
  cursor: pointer;
}
.book-card button:hover { background: var(--gold-dim); color: var(--ink); }

.desk { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 2rem; }
form { display: flex; flex-direction: column; gap: 0.35rem; }
form label {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--parchment-dim);
}
form label .opt { text-transform: none; letter-spacing: 0; font-style: italic; opacity: 0.8; }
form input, form select {
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--parchment);
  padding: 0.65rem 0.75rem;
  font-family: var(--font-body);
  font-size: 1.05rem;
}
form input:focus, form select:focus { outline: none; border-color: var(--gold); }
label.consent {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--parchment-dim);
}
label.consent input { width: auto; margin-top: 0.25rem; }

button#submit-btn {
  margin-top: 1.5rem;
  background: var(--burgundy);
  color: var(--parchment);
  border: 1px solid var(--gold-dim);
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.95rem;
  padding: 0.9rem;
  border-radius: 3px;
  cursor: pointer;
}
button#submit-btn:hover { background: #832626; }
button#submit-btn:disabled { opacity: 0.55; cursor: wait; }

.form-note { min-height: 1.2em; color: var(--danger); font-size: 0.9rem; margin: 0.5rem 0 0; }

.result { margin-top: 2rem; padding: 1.5rem; border-radius: 5px; border: 1px solid var(--line); }
.result.correct { border-color: var(--ok); background: rgba(74,122,90,0.08); }
.result.incorrect { border-color: var(--gold-dim); background: rgba(201,162,75,0.05); }
.result h3 { font-family: var(--font-display); margin-top: 0; }
.seal-code {
  display: inline-block;
  font-family: var(--font-display);
  letter-spacing: 0.25em;
  font-size: 1.3rem;
  color: var(--gold);
  border: 1px solid var(--gold-dim);
  padding: 0.5rem 1rem;
  border-radius: 3px;
  margin: 0.75rem 0;
}

.ledger-sub { text-align: center; color: var(--parchment-dim); font-style: italic; margin-top: -1rem; }
.ledger-list { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1.5rem; }
.ledger-loading { text-align: center; color: var(--parchment-dim); font-style: italic; }
.ledger-row { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; align-items: center; }
.ledger-row .label { font-size: 0.95rem; }
.ledger-row .count { font-family: var(--font-display); color: var(--gold); font-size: 0.9rem; white-space: nowrap; }
.ledger-bar-track { grid-column: 1 / -1; height: 6px; background: var(--ink); border-radius: 3px; overflow: hidden; }
.ledger-bar-fill { height: 100%; background: linear-gradient(90deg, var(--gold-dim), var(--gold)); }

.site-footer {
  text-align: center;
  padding: 2.5rem 1.5rem 4rem;
  color: var(--parchment-dim);
  font-size: 0.88rem;
  max-width: 640px;
  margin: 0 auto;
}
.site-footer .fine { margin-top: 0.75rem; letter-spacing: 0.15em; text-transform: uppercase; font-size: 0.72rem; }

@media (max-width: 480px) {
  .site-header { padding: 3rem 1rem 1.5rem; }
  .desk { padding: 1.25rem; }
}