:root {
  --f1: #e0e7ff; --f2: #fde68a; --f3: #bbf7d0; --f4: #fbcfe8; --f5: #ddd6fe;
  --f6: #fed7aa; --f7: #cffafe; --f8: #fecaca; --f9: #e9d5ff; --f10: #d9f99d;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --hl: #1e1b4b;
  --warn-bg: #fef3c7;
  --warn-border: #f59e0b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --f1: rgba(224, 231, 255, .22); --f2: rgba(253, 230, 138, .22);
    --f3: rgba(187, 247, 208, .22); --f4: rgba(251, 207, 232, .22);
    --f5: rgba(221, 214, 254, .22); --f6: rgba(254, 215, 170, .22);
    --f7: rgba(207, 250, 254, .22); --f8: rgba(254, 202, 202, .22);
    --f9: rgba(233, 213, 255, .22); --f10: rgba(217, 249, 157, .22);
    --bg: #0f172a;
    --card: #1e293b;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: #334155;
    --accent: #818cf8;
    --accent-text: #0f172a;
    --hl: #facc15;
    --warn-bg: rgba(245, 158, 11, .15);
    --warn-border: #f59e0b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
}

header { border-bottom: 1px solid var(--border); background: var(--card); }
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
h1 { margin: 0; font-size: 1.5rem; }
.tagline { margin: 4px 0 0; color: var(--muted); font-size: .95rem; }

main { max-width: 1100px; margin: 0 auto; padding: 16px; }

textarea {
  width: 100%;
  min-height: 180px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: .85rem;
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 12px 0; }
.toolbar button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: .9rem;
  cursor: pointer;
}
.toolbar button:hover { border-color: var(--accent); }
.toolbar .primary { background: var(--accent); color: var(--accent-text); border-color: transparent; }
.toolbar .enc { margin-left: auto; display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: .9rem; }
.toolbar select {
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

#error {
  display: none;
  margin: 12px 0;
  padding: 10px 14px;
  border: 1px solid var(--warn-border);
  background: var(--warn-bg);
  border-radius: 8px;
  font-size: .9rem;
}
#error.show { display: block; }

#toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(8px);
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: .9rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .25);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  max-width: min(90vw, 560px);
  overflow-wrap: anywhere;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.msg {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 20px;
}

.summary { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 10px; }
.kindbadge {
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 999px;
  padding: 2px 12px;
  font-size: .8rem;
  font-weight: 600;
}
.chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 12px;
  font-size: .85rem;
  background: var(--bg);
}
.chip-label { color: var(--muted); font-size: .75rem; }

.banner {
  margin: 10px 0;
  padding: 8px 14px;
  border: 1px solid var(--warn-border);
  background: var(--warn-bg);
  border-radius: 8px;
  font-size: .85rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}
@media (max-width: 800px) { .split { grid-template-columns: 1fr; } }

.hex, .fields { min-width: 0; }
.hex h2, .fields h2 {
  margin: 0 0 8px;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
}
.hex { overflow-x: auto; }

.hex-grid { font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace; font-size: .82rem; }
.hex-row { display: flex; gap: 2px; padding: 1px 0; white-space: nowrap; }
.hex-off { color: var(--muted); margin-right: 10px; min-width: 4ch; user-select: none; }
.b { border-radius: 3px; padding: 0 1px; cursor: default; }
.b[data-off] { cursor: pointer; }
.b[data-off]:hover { box-shadow: inset 0 0 0 1px var(--accent); }
.b.neutral { color: var(--muted); }
.b.pad { color: transparent; }
.hex-row .b:nth-child(10) { margin-left: 8px; }
.hex-row .b.pad:nth-child(10) { margin-left: 0; }

.fields { overflow-x: auto; }
.field {
  display: grid;
  grid-template-columns: 3.5ch 1fr 1.5fr 1.9fr;
  gap: 10px;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  font-size: .88rem;
  min-width: 560px;
  border-radius: 4px;
}
.field:last-child { border-bottom: none; }
.field .de { color: var(--muted); font-weight: 600; }
.field .name { font-weight: 500; }
.field .value { word-break: break-all; }
.field .meaning { color: var(--muted); font-size: .82rem; }
.field .raw {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: .78rem;
  color: var(--muted);
  word-break: break-all;
}
.field.uncertain { outline: 1.5px dashed var(--warn-border); outline-offset: -1.5px; margin: 4px 0; border-bottom-color: transparent; }

.hl { box-shadow: inset 0 0 0 2px var(--hl); }
.field.hl { background: var(--bg); }

.muted { color: var(--muted); }

footer { border-top: 1px solid var(--border); margin-top: 24px; }
footer p { max-width: 1100px; margin: 0 auto; padding: 14px 16px; color: var(--muted); font-size: .85rem; }