*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #0f1724;
  --surface: #1a2235;
  --border:  #2a3450;
  --text:    #c8d4e8;
  --muted:   #5a6a88;
  --accent:  #4a90d9;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 13px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px 64px;
}

h1 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 28px;
  opacity: 0.7;
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  width: 100%;
  max-width: 900px;
  align-items: start;
}

/* ---- sidebar ---- */
.sidebar { display: flex; flex-direction: column; gap: 16px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.card-title {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.field { margin-bottom: 10px; }
.field:last-child { margin-bottom: 0; }
.field label {
  display: block;
  font-size: 10px;
  color: var(--muted);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}
.field input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  padding: 6px 9px;
  outline: none;
  transition: border-color 0.15s;
}
.field input[type="text"]:focus { border-color: var(--accent); }

.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.slider-row:last-child { margin-bottom: 0; }
.slider-row label { font-size: 10px; color: var(--muted); min-width: 54px; }
.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}
.slider-row .val {
  font-size: 10px;
  color: var(--text);
  min-width: 32px;
  text-align: right;
}

/* palette buttons */
.pal-grid { display: flex; flex-direction: column; gap: 6px; }
.pal-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 9px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  color: var(--muted);
  font-family: inherit;
  font-size: 11px;
  text-align: left;
  transition: border-color 0.15s, color 0.15s;
}
.pal-btn:hover { border-color: #4a5a78; color: var(--text); }
.pal-btn.active { border-color: var(--accent); color: var(--text); }
.dots { display: flex; gap: 3px; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: block; }

/* quote field */
.quote-row { display: flex; gap: 6px; align-items: center; }
.quote-row input { flex: 1; min-width: 0; }
.btn-quote {
  flex-shrink: 0;
  padding: 6px 9px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  line-height: 1;
}
.btn-quote:hover { color: var(--text); border-color: #4a5a78; }
.btn-quote.loading { animation: spin 0.7s linear infinite; color: var(--accent); }
@keyframes spin { to { transform: rotate(360deg); } }
#quote-author {
  font-size: 10px;
  color: var(--muted);
  min-height: 1.2em;
  margin-top: 4px;
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* log panel */
#log-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 10px;
  line-height: 1.8;
  max-height: 130px;
  overflow-y: auto;
  font-family: 'JetBrains Mono','Fira Code',monospace;
}
#log-panel:empty::before { content: 'nessun evento ancora…'; color: var(--muted); }
.log-ok   { color: #4ade80; }
.log-err  { color: #f87171; }
.log-info { color: #93c5fd; }
.log-warn { color: #fbbf24; }
.log-ts   { color: var(--muted); margin-right: 6px; }

/* action buttons */
.btn-group { display: flex; flex-direction: column; gap: 6px; }
.btn {
  padding: 8px 12px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-align: center;
  letter-spacing: 0.05em;
}
.btn:hover { background: var(--surface); border-color: #4a5a78; }
.btn.primary { border-color: var(--accent); color: var(--accent); }
.btn.primary:hover { background: rgba(74,144,217,0.1); }

/* status */
#status {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.6;
  min-height: 2.4em;
}

/* legend */
.legend-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
  margin-bottom: 6px;
}
.leg-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 8px;
  color: var(--muted);
}
.leg-cell canvas { border-radius: 2px; display: block; }

/* decode */
#dec-result {
  font-size: 13px;
  color: var(--text);
  min-height: 1.4em;
  margin-top: 8px;
  word-break: break-all;
}

/* ---- canvas area ---- */
.canvas-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
#sketch-wrap canvas {
  display: block;
  border-radius: 4px;
}

/* dump */
.dump {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}
.dump-title {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.dump-body {
  font-size: 11px;
  word-break: break-all;
  line-height: 2;
}
.dn { display: inline-block; padding: 1px 3px; border-radius: 3px; cursor: default; }
.dn.pad { opacity: 0.3; }
.pair { display: inline-block; margin-right: 5px; }

/* responsive */
@media (max-width: 640px) {
  .layout { grid-template-columns: 1fr; }
  .canvas-area { order: -1; }
}

/* tag chips */
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 7px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 9px;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.tag-chip:hover       { border-color: #4a5a78; color: var(--text); }
.tag-chip.active      { border-color: var(--accent); color: var(--accent); }

/* background image upload */
.file-upload-row {
  display: flex;
  gap: 6px;
  align-items: center;
}
.btn-file {
  padding: 5px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.btn-file:hover { color: var(--text); border-color: #4a5a78; }
.btn-file.has-image { border-color: var(--accent); color: var(--accent); }
#bg-filename {
  font-size: 10px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}