.dec-try { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px; font-size: 14px; color: var(--muted); }
.chip-btn { font: 500 13.5px 'IBM Plex Sans', sans-serif; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); cursor: pointer; }
.chip-btn:hover { background: var(--surface-2); }
.dec-in { display: block; width: 100%; box-sizing: border-box; font: 500 14px/1.5 'IBM Plex Mono', monospace; padding: 14px 16px; color: var(--ink); resize: vertical; min-height: 180px; }
.dec-in:focus { outline: 2px solid var(--ink); outline-offset: 0; }
.dec-sum p { margin: 12px 0; font-size: 14px; color: var(--ink-2); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.note { font-size: 13px; color: var(--muted); max-width: 90ch; margin: 12px 0 0; }
.note a { color: var(--ink); }

/* Decoded lines: message on the left, explanation on the right */
.ffr { overflow: hidden; }
.ffr-line { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); border-bottom: 1px solid var(--line); }
.ffr-line:last-child { border-bottom: 0; }
.ffr-line code { font: 500 13.5px/1.45 'IBM Plex Mono', monospace; background: #1C1D20; color: #F4F4F1; padding: 12px 16px; white-space: pre-wrap; word-break: break-all; }
.ffr-line .ex { padding: 10px 16px; }
.ffr-line .ex b { display: block; color: var(--ink); font-size: 14px; }
.ffr-line .ex span { color: var(--ink-2); font-size: 13.5px; }
.ffr-line.unk .ex b { color: var(--bad); }
@media (max-width: 720px) { .ffr-line { grid-template-columns: 1fr; } }

/* Reference lists */
.ref { padding-top: 28px; display: grid; gap: 12px; }
.ref-box { padding: 0; }
.ref-box summary { cursor: pointer; padding: 14px 18px; font-size: 15px; list-style-position: inside; }
.ref-box summary span { color: var(--muted); font-size: 14px; margin-left: 6px; }
.ref-list { border-top: 1px solid var(--line); }
.ref-row { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: 12px; padding: 10px 18px; border-bottom: 1px solid var(--line); font-size: 14px; }
.ref-row:last-child { border-bottom: 0; }
.ref-row code { font: 600 14px 'IBM Plex Mono', monospace; color: var(--ink); }
.ref-row b { display: block; color: var(--ink); }
.ref-row span { color: var(--ink-2); }
[hidden] { display: none !important; }