/* Novel Encryption: card-catalog palette, paper tones, dark reading-room mode. */
:root {
  --paper: #f6efe1;
  --paper-2: #efe5d0;
  --card: #fffaf0;
  --ink: #2b2118;
  --ink-2: #5b4b3c;
  --muted: #8a7764;
  --rule: #d9c9ac;
  --card-line: rgba(70, 110, 170, 0.18);
  --card-red: #b8432f;
  --accent: #8a2b22;
  --accent-ink: #fffaf0;
  --gold: #b0802a;
  --link: #8a2b22;
  --ok: #3f6b3a;
  --bad: #a3321f;
  --shadow: 0 1px 0 rgba(60, 40, 20, 0.08), 0 6px 18px -10px rgba(60, 40, 20, 0.35);
  --serif: "EB Garamond", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --type: "Courier Prime", "Courier New", ui-monospace, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1c1712;
    --paper-2: #241d16;
    --card: #2a221a;
    --ink: #efe4cf;
    --ink-2: #cdbda2;
    --muted: #9c8a73;
    --rule: #4a3d2f;
    --card-line: rgba(140, 170, 220, 0.12);
    --card-red: #d06a52;
    --accent: #d9774f;
    --accent-ink: #1c1712;
    --gold: #e0b45c;
    --link: #e89a74;
    --ok: #8fbf7f;
    --bad: #f08a70;
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 8px 22px -12px rgba(0, 0, 0, 0.8);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #1c1712;
  --paper-2: #241d16;
  --card: #2a221a;
  --ink: #efe4cf;
  --ink-2: #cdbda2;
  --muted: #9c8a73;
  --rule: #4a3d2f;
  --card-line: rgba(140, 170, 220, 0.12);
  --card-red: #d06a52;
  --accent: #d9774f;
  --accent-ink: #1c1712;
  --gold: #e0b45c;
  --link: #e89a74;
  --ok: #8fbf7f;
  --bad: #f08a70;
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 8px 22px -12px rgba(0, 0, 0, 0.8);
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; background: var(--paper); }
/* boot.js holds the page until its fonts arrive, then fades it in once. */
body { transition: opacity 0.22s ease-out; }
html.fonts-loading body { opacity: 0; }
@media (prefers-reduced-motion: reduce) { body { transition: none; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.55;
  overflow-x: hidden;
}
a { color: var(--link); text-underline-offset: 3px; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.fine { color: var(--muted); font-size: 0.85rem; margin: 0.9rem 0 0; }
small { color: var(--muted); font-size: 0.82em; }

/* Masthead */
.masthead {
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(184, 67, 47, 0.08), transparent 60%),
    var(--paper-2);
  padding: 56px 0 28px;
}
.eyebrow {
  font-family: var(--type);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 6px;
}
h1 {
  font-size: clamp(2.6rem, 8vw, 4.6rem);
  line-height: 1;
  margin: 0 0 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
h1 em { color: var(--accent); font-weight: 500; }
.lede { font-size: 1.25rem; max-width: 40rem; margin: 0 0 22px; color: var(--ink-2); }
.top-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; font-family: var(--type); font-size: 0.9rem; }
.top-nav a { color: var(--ink-2); text-decoration: none; border-bottom: 1px dotted var(--muted); }
.top-nav a:hover { color: var(--accent); }
.privacy-note { margin: 20px 0 0; font-style: italic; color: var(--ink-2); }
.privacy-note span { color: var(--gold); font-style: normal; }

/* Steps */
.step { padding: 44px 0 8px; transition: opacity 0.3s; }

.step-head { display: flex; gap: 16px; align-items: baseline; margin-bottom: 18px; }
.step-no { font-size: 2rem; color: var(--card-red); font-weight: 600; min-width: 2.2ch; }
h2 { font-size: 1.85rem; margin: 0 0 4px; font-weight: 600; }
.step-head p { margin: 0; color: var(--ink-2); max-width: 44rem; }

/* Card catalog */
.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: left;
  width: 100%;
  min-width: 0;
  padding: 18px 18px 30px 18px;
  font: inherit;
  color: var(--ink);
  background-color: var(--card);
  background-image:
    linear-gradient(var(--card-red), var(--card-red)),
    repeating-linear-gradient(to bottom, transparent 0 25px, var(--card-line) 25px 26px);
  background-size: 100% 2px, 100% 100%;
  background-position: 0 46px, 0 46px;
  background-repeat: no-repeat, no-repeat;
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.card::after { /* the punched hole of a catalog card */
  content: "";
  position: absolute;
  left: 50%;
  bottom: 9px;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  border-radius: 50%;
  background: var(--paper);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.25);
}
.card:hover { transform: translateY(-2px); }
.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.card[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent), var(--shadow); }
.card-call { font-family: var(--type); font-size: 0.78rem; color: var(--muted); margin-bottom: 8px; }
.card-title { font-size: 1.25rem; font-weight: 600; line-height: 1.2; margin-top: 4px; }
.card-author { font-style: italic; color: var(--ink-2); }
.card-meta { font-family: var(--type); font-size: 0.78rem; color: var(--ink-2); margin-top: 8px; line-height: 1.6; }
.card .stamp {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--type);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--card-red);
  border: 1.5px solid var(--card-red);
  border-radius: 3px;
  padding: 1px 6px;
  transform: rotate(4deg);
  opacity: 0;
  transition: opacity 0.2s;
}
.card[aria-pressed="true"] .stamp { opacity: 0.9; }
.own-book { margin-top: 16px; }
.own-card { max-width: 520px; }
.own-card .btn { align-self: flex-start; margin-top: 10px; }

.book-status {
  min-height: 4.8em; /* the loaded status's height, reserved so nothing below moves */
  margin-top: 18px;
  padding: 12px 16px;
  border-left: 3px solid var(--gold);
  background: var(--paper-2);
  font-size: 0.95rem;
  overflow-wrap: anywhere;
}
.book-status code, .fp { font-family: var(--type); font-size: 0.82rem; }
.book-status.bad { border-left-color: var(--bad); }

/* Panels & controls */
.panel {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 20px;
  box-shadow: var(--shadow);
}
.label { display: block; font-family: var(--type); font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); margin: 14px 0 6px; }
.depth { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; margin-bottom: 16px; }
.depth .label { margin: 0; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 6px 16px; }
.seg label, .armor label { cursor: pointer; }
.words-ctl { display: flex; align-items: center; gap: 10px; flex: 1 1 220px; }
.words-ctl input { flex: 1; accent-color: var(--accent); min-width: 0; }
.words-ctl output { font-family: var(--type); font-size: 0.9rem; white-space: nowrap; }
input[type="radio"] { accent-color: var(--accent); }

textarea {
  display: block;
  width: 100%;
  font-family: var(--type);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 10px 12px;
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.key-input { font-size: 1rem; }

.btn {
  font: inherit;
  font-family: var(--type);
  font-size: 0.92rem;
  font-weight: 700;
  border: 1px solid var(--ink-2);
  background: transparent;
  color: var(--ink);
  border-radius: 3px;
  padding: 9px 16px;
  cursor: pointer;
  display: inline-block;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover:not(:disabled) { color: var(--accent-ink); filter: brightness(1.08); }
.btn-small { font-size: 0.8rem; padding: 5px 11px; }
.btn-ghost { border-style: dashed; }
.link-btn { font: inherit; font-size: 0.85rem; background: none; border: none; color: var(--link); text-decoration: underline; cursor: pointer; padding: 0; }

/* The chain */
.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 4px;
  margin: 18px 0 4px;
  min-height: 0;
}
.chain:empty { display: none; }
.chain .w {
  font-family: var(--type);
  font-size: 1.05rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 3px 8px;
  animation: drop 0.35s both;
  overflow-wrap: anywhere;
}
.chain .w b { color: var(--card-red); font-weight: 700; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.chain .arrow { color: var(--gold); font-size: 0.95rem; animation: drop 0.35s both; }
@keyframes drop { from { opacity: 0; transform: translateY(-6px); } }
.chain .passage {
  margin: 0;
  padding: 14px 18px;
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.6;
  font-style: italic;
  background: var(--paper);
  border-left: 3px solid var(--gold);
  border-radius: 0 3px 3px 0;
  animation: drop 0.5s both;
  overflow-wrap: anywhere;
}
.chain .passage::before { content: "“"; color: var(--gold); }
.chain .passage::after { content: "”"; color: var(--gold); }
@media (prefers-reduced-motion: reduce) { .chain .w, .chain .arrow, .chain .passage { animation: none; } .card:hover { transform: none; } }

.key-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; align-items: center; margin-top: 8px; }
.key-actions { display: flex; gap: 8px; }
.key-check { font-size: 0.95rem; min-height: 1.5em; }
.key-check.ok { color: var(--ok); }
.key-check.bad { color: var(--bad); }
.meter { position: relative; height: 8px; border-radius: 4px; background: var(--paper-2); border: 1px solid var(--rule); margin-top: 12px; overflow: visible; }
#meter-fill { height: 100%; width: 0; border-radius: 4px; background: var(--muted); transition: width 0.4s, background 0.4s; }
#meter-fill.strong { background: var(--ok); }
#meter-fill.weak { background: var(--bad); }
.meter-mark { position: absolute; top: 10px; transform: translateX(-50%); font-family: var(--type); font-size: 0.7rem; color: var(--muted); }
.meter-mark::before { content: ""; position: absolute; left: 50%; top: -12px; height: 10px; border-left: 1px dashed var(--muted); }

/* Tabs */
.tabs { display: flex; gap: 4px; margin-bottom: -1px; position: relative; }
.tabs button {
  font: inherit;
  font-family: var(--type);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 8px 20px;
  background: var(--paper-2);
  color: var(--ink-2);
  border: 1px solid var(--rule);
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
}
.tabs button[aria-selected="true"] { background: var(--card); color: var(--accent); }
.pane { border-top-left-radius: 0; }

.file-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-block: 12px 22px; font-size: 0.9rem; }
.file-row .muted { overflow-wrap: anywhere; }
.armor { border: none; padding: 0; margin: 8px 0 16px; display: grid; gap: 6px; }
.armor label { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: baseline; }
.status { margin-top: 12px; font-size: 0.95rem; min-height: 1.4em; }
.status.bad { color: var(--bad); }
.status.ok { color: var(--ok); }
.out { margin-top: 12px; }
.out-actions { display: flex; gap: 8px; margin-top: 8px; }
.spinner { display: inline-block; width: 0.9em; height: 0.9em; border: 2px solid var(--rule); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: -0.1em; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* How it works */
.how { padding: 56px 0 24px; }
.how-list { padding-left: 1.3em; max-width: 46rem; }
.how-list li { margin-bottom: 12px; }
.how-list li::marker { color: var(--card-red); font-weight: 700; }

.footer { border-top: 1px solid var(--rule); margin-top: 48px; padding: 22px 0 40px; color: var(--muted); font-size: 0.9rem; background: var(--paper-2); }
.footer p { margin: 0; overflow-wrap: anywhere; }

@media (max-width: 560px) {
  body { font-size: 17px; }
  .masthead { padding-top: 36px; }
  .step-head { gap: 10px; }
  .step-no { font-size: 1.5rem; }
  h2 { font-size: 1.5rem; }
  .panel { padding: 16px 14px; }
  .catalog { grid-template-columns: 1fr; }
}

.meter-mark-128 { left: 50%; }

@media (max-width: 600px) { .book-status { min-height: 11em; } }

/* Guide line at the top of steps II and III: says what to do next, or what
   book is in use. One line of fixed height, so it never moves the layout. */
.guide {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px;
  min-height: 3.2em; margin: 0 0 16px; padding: 10px 14px;
  border: 1px dashed var(--gold); border-radius: 3px; background: var(--paper-2);
  font-size: 0.98rem;
}
.guide.ready { border-style: solid; border-color: var(--rule); }
.guide-text { flex: 1 1 18em; min-width: 0; }
.guide-go { font-family: var(--type); font-size: 0.88rem; white-space: nowrap; }
@media (max-width: 600px) { .guide { min-height: 5.6em; } }
/* Brief highlight on the shelf when a guide link sends the reader there. */
.catalog.nudge .card { animation: nudge 1.1s ease-out 1; }
@keyframes nudge { 30% { box-shadow: 0 0 0 3px var(--gold); } }
@media (prefers-reduced-motion: reduce) { .catalog.nudge .card { animation: none; outline: 2px solid var(--gold); } }