/* Garfield-Naruto Encoder — the page is served as a static site, so this file
   is the whole design. No build step, no framework. */

:root {
  --bg: #fbfaf7;
  --fg: #1d1c1a;
  --muted: #6b6862;
  --rule: #e2ded6;
  --card: #ffffff;
  --accent: #c2410c;          /* the encoder's yellow/red gradient, muted */
  --accent-soft: #fff4ec;
  --bit0: #b45309;
  --bit1: #1d4ed8;
  --skip: #4b5563;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171614; --fg: #ece9e3; --muted: #9c978e; --rule: #33302b;
    --card: #201e1b; --accent: #fb923c; --accent-soft: #2a211a;
    --bit0: #fbbf24; --bit1: #93c5fd; --skip: #9ca3af;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---- header ------------------------------------------------------------- */
.fixed-top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  padding: 14px 20px 0;
}
.fixed-top h1 {
  margin: 0 auto; max-width: 760px;
  font-size: 1.35rem; letter-spacing: -0.02em;
}
.select-bar {
  max-width: 760px; margin: 10px auto 0;
  display: flex; flex-wrap: wrap; gap: 4px;
}
.selection {
  color: var(--muted); text-decoration: none;
  font-size: 0.9rem; padding: 8px 12px;
  border-bottom: 2px solid transparent;
}
.selection:hover { color: var(--fg); border-bottom-color: var(--accent); }

/* ---- layout ------------------------------------------------------------- */
.content-column {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 20px 96px;
}
h2 {
  margin: 44px 0 8px;
  font-size: 1.15rem; letter-spacing: -0.01em;
  padding-top: 12px; border-top: 1px solid var(--rule);
}
h2:first-of-type { border-top: 0; }
p { margin: 0 0 14px; }
a { color: var(--accent); }
code {
  font-family: var(--mono); font-size: 0.88em;
  background: var(--accent-soft); padding: 1px 5px; border-radius: 4px;
}

/* ---- forms -------------------------------------------------------------- */
.input_label {
  display: flex; align-items: center; gap: 10px;
  margin: 0 0 10px;
  font-size: 0.9rem; color: var(--muted);
}
.input_label input {
  flex: 1 1 auto; min-width: 0;
  font: inherit; color: var(--fg);
  background: var(--card);
  border: 1px solid var(--rule); border-radius: 7px;
  padding: 9px 11px;
}
.input_label input[type="number"] { flex: 0 0 90px; }
.input_label input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.button_holder { display: flex; gap: 10px; margin: 16px 0; }
button {
  font: inherit; font-weight: 550;
  color: #fff; background: var(--accent);
  border: 0; border-radius: 7px; padding: 10px 18px;
  cursor: pointer;
}
button:hover:not(:disabled) { filter: brightness(1.08); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.status { font-size: 0.83rem; color: var(--muted); }

pre {
  background: var(--card);
  border: 1px solid var(--rule); border-radius: 9px;
  padding: 14px 16px; margin: 0 0 8px;
  font-family: var(--mono); font-size: 0.86rem; line-height: 1.6;
  white-space: pre-wrap; word-break: break-word;
  min-height: 3.5em;
}

/* ---- embedded Space ----------------------------------------------------- */
.space-embed {
  width: 100%; height: 720px;
  border: 1px solid var(--rule); border-radius: 9px;
  background: var(--card);
}
.callout {
  background: var(--accent-soft);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 7px;
  padding: 12px 14px; margin: 0 0 16px;
  font-size: 0.9rem;
}
.callout p:last-child { margin-bottom: 0; }

/* ---- letter frequency table --------------------------------------------- */
.table_holder { overflow-x: auto; margin: 0 0 22px; }
table { border-collapse: collapse; width: 100%; font-size: 0.82rem; }
th {
  text-align: left; font-weight: 600; color: var(--muted);
  padding: 8px 6px; border-bottom: 1px solid var(--rule);
}
td {
  padding: 7px 6px; text-align: center;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
}
td:empty { border-bottom: 0; }

/* ---- the three keyed buckets -------------------------------------------- */
.partitions {
  display: grid; gap: 12px; margin: 0 0 22px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}
.group {
  background: var(--card);
  border: 1px solid var(--rule); border-radius: 9px;
  padding: 14px; text-align: center;
}
.group h3 { margin: 0 0 8px; font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.letters { font-family: var(--mono); font-size: 1rem; letter-spacing: 0.14em; }
.prob { margin-top: 8px; font-size: 0.8rem; color: var(--muted); }
.group1 { border-top: 3px solid var(--bit0); }
.group2 { border-top: 3px solid var(--bit1); }
.group3 { border-top: 3px solid var(--skip); }
.group1 .letters { color: var(--bit0); }
.group2 .letters { color: var(--bit1); }
.group3 .letters { color: var(--skip); }

@media (max-width: 620px) {
  .input_label { flex-direction: column; align-items: stretch; gap: 5px; }
  .space-embed { height: 640px; }
}