:root {
  --bg: #0d0f12;
  --panel: #15181d;
  --line: #262a31;
  --text: #e8e6e1;
  --muted: #888f98;
  --ember: #ff6a2b;
  --ember-soft: #ffb27a;
  --ash: #2a2218;
  --danger: #ff5a3c;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 620px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.masthead { margin-bottom: 28px; }
.masthead h1 {
  display: inline-block;
  margin: 0;
  font-size: 22px;
  font-weight: 650;
  letter-spacing: -0.02em;
  vertical-align: middle;
}
.mark {
  display: inline-block;
  width: 10px; height: 10px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 10px 1px rgba(255, 106, 43, 0.7);
  vertical-align: middle;
}
.tag { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

section { margin-bottom: 20px; }

.field { display: block; margin-bottom: 22px; border: 0; padding: 0; }
fieldset.field { margin: 0 0 22px; }
.label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

textarea, input[type="text"], input[type="number"], select {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 13px;
  font-size: 15px;
  font-family: inherit;
}
textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
}
textarea:focus, input:focus, select:focus {
  outline: 2px solid var(--ember);
  outline-offset: 1px;
  border-color: var(--ember);
}

.hint { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; }
.hint.warn { color: var(--ember-soft); }
.hint code { background: rgba(255,255,255,0.06); padding: 1px 5px; border-radius: 4px; }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 560px) { .row { grid-template-columns: 1fr; gap: 0; } }

.inline { display: flex; align-items: center; gap: 10px; }
.inline input[type="number"] { width: 92px; }
.inline select { width: auto; }
.unit { color: var(--muted); font-size: 14px; }

.modes { display: flex; gap: 18px; margin-bottom: 12px; }
.radio { display: inline-flex; align-items: center; gap: 7px; font-size: 15px; cursor: pointer; }
.radio input { accent-color: var(--ember); }

button {
  font: inherit;
  cursor: pointer;
  border-radius: var(--radius);
  padding: 12px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
}
button:focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }
button:disabled { opacity: 0.55; cursor: default; }

.primary {
  background: var(--ember);
  border-color: var(--ember);
  color: #1a0c04;
  font-weight: 650;
}
.primary:hover:not(:disabled) { background: var(--ember-soft); border-color: var(--ember-soft); }
.primary.danger { background: var(--danger); border-color: var(--danger); color: #200a06; }
.primary.danger:hover:not(:disabled) { filter: brightness(1.08); }

.ghost:hover:not(:disabled) { border-color: var(--ember); color: var(--ember-soft); }

.err { color: var(--danger); font-size: 14px; margin-top: 12px; }

.linkbox { display: flex; gap: 8px; }
.linkbox input {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}
#resultmeta { margin-top: 14px; }

.foot {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.hidden { display: none !important; }

/* ---- reader ---- */
.reader .panel { min-height: 120px; }
.lead { font-size: 18px; margin: 0 0 10px; }
.muted { color: var(--muted); }

.secret {
  margin: 18px 0 0;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ember);
  border-radius: var(--radius);
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px;
  line-height: 1.6;
}

.reader .panel { min-height: 80px; }

/* smart-duration controls */
.estimate {
  font-weight: 650;
  color: var(--ember);
  font-variant-numeric: tabular-nums;
  font-size: 16px;
}
.sub { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 14px; }
.sub input[type="number"] { width: 74px; }
#smartrow { margin-top: 12px; gap: 18px; }
#fixedrow { margin-top: 12px; }

/* reader: discourage selection, copy, and long-press callout (best-effort) */
.reader, .reader .secret {
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}
.reader .secret { cursor: default; border-left-color: var(--ember); }

/* the single OPEN action */
#open { text-align: center; padding-top: 22px; }
#open .lead { margin-bottom: 18px; }
#openbtn { font-size: 17px; padding: 15px 48px; letter-spacing: 0.14em; }
#openerr { margin-top: 14px; }


/* dissolve: a soft edge sweeps through the text, character by character, in reading order */
.secret .wd { display: inline-block; }
.secret .c {
  transition: opacity 0.7s ease, filter 0.7s ease;
  will-change: opacity, filter;
}
.secret .c.gone { opacity: 0; filter: blur(2px); }
@media (prefers-reduced-motion: reduce) {
  .secret .c { transition: opacity 0.7s ease; }
  .secret .c.gone { filter: none; }
}