/* mini-midi editor — no framework, no external assets. */

:root {
  --bg: #14171c;
  --panel: #1d2129;
  --panel-2: #232834;
  --border: #323a48;
  --text: #dde3ec;
  --muted: #8b95a5;
  --accent: #4da3ff;
  --accent-2: #2f6fb5;
  --ok: #3ecf6e;
  --warn: #e6b93c;
  --err: #e5604c;
  --led-on: #ffd54a;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 0 16px 32px;
  max-width: 1100px;
  margin-inline: auto;
}

h1 { font-size: 18px; margin: 0 12px 0 0; letter-spacing: 0.04em; }
h2 { font-size: 14px; margin: 0 0 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
h3 { font-size: 13px; margin: 0; }

/* ---- connect bar ---- */
#connect-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}
.device-info { color: var(--muted); font-size: 12px; }

button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  font: inherit;
  cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent-2); border-color: var(--accent-2); }
button.primary:hover:not(:disabled) { background: var(--accent); }
button.ghost { background: transparent; border-color: transparent; color: var(--muted); }
button.ghost:hover:not(:disabled) { color: var(--text); border-color: var(--border); }

.badge {
  font-size: 11px;
  padding: 2px 9px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}
.badge.on  { color: #0c1510; background: var(--ok); border-color: var(--ok); font-weight: 600; }
.badge.off { color: var(--muted); }
.badge.warn { color: #1a1405; background: var(--warn); border-color: var(--warn); font-weight: 600; }

/* ---- notices / banner ---- */
.notice {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin: 0 0 14px;
  white-space: pre-line;
}
.notice.error { border-left-color: var(--err); }
.notice.info { border-left-color: var(--ok); }
.notice #banner-text { flex: 1; }
.notice button { padding: 0 8px; line-height: 1.2; }

/* ---- main body ---- */
fieldset#editor-body {
  border: none;
  margin: 0;
  padding: 0;
  min-inline-size: 0;
}
fieldset#editor-body:disabled { opacity: 0.55; }

section { margin-bottom: 18px; }

/* ---- button cards ---- */
#button-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px 14px;
}
.card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.card-head h3 { flex: 1; }

.led {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #3a4150;
  border: 1px solid #000;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.6);
  transition: background 80ms linear, box-shadow 80ms linear;
}
.led.on {
  background: var(--led-on);
  box-shadow: 0 0 8px 2px rgba(255, 213, 74, 0.55);
  opacity: var(--led-level, 1);
}

/* Hold flashes (SPEC-assignments.md §5.3). The device reports level + flash
   kind, not blink phase — status polls at ~10 Hz, so the blink is animated
   here rather than sampled. */
.led.flash-fast, .led.flash-slow-low, .led.flash-slow-high {
  animation-iteration-count: infinite;
  animation-timing-function: steps(1, end);
}
.led.flash-fast { animation-name: led-blink-50; animation-duration: 120ms; }
/* Secondary active, primary dark: mostly off with brief blips. */
.led.flash-slow-low { animation-name: led-blink-20; animation-duration: 800ms; }
/* Secondary active, primary lit too: mostly on with brief dropouts. */
.led.flash-slow-high { animation-name: led-blink-80; animation-duration: 800ms; }

@keyframes led-blink-50 {
  0%   { background: var(--led-on); box-shadow: 0 0 8px 2px rgba(255,213,74,.55); opacity: var(--led-level, 1); }
  50%  { background: #3a4150; box-shadow: inset 0 1px 2px rgba(0,0,0,.6); opacity: 1; }
}
@keyframes led-blink-20 {
  0%   { background: var(--led-on); box-shadow: 0 0 8px 2px rgba(255,213,74,.55); opacity: var(--led-level, 1); }
  20%  { background: #3a4150; box-shadow: inset 0 1px 2px rgba(0,0,0,.6); opacity: 1; }
}
@keyframes led-blink-80 {
  0%   { background: var(--led-on); box-shadow: 0 0 8px 2px rgba(255,213,74,.55); opacity: var(--led-level, 1); }
  80%  { background: #3a4150; box-shadow: inset 0 1px 2px rgba(0,0,0,.6); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .led.flash-fast, .led.flash-slow-low, .led.flash-slow-high { animation: none; }
}

.fields { display: flex; flex-direction: column; gap: 7px; }
.field {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
}
.field > label { color: var(--muted); font-size: 12.5px; }
.field .control { display: flex; align-items: center; gap: 6px; justify-content: flex-end; }

input[type="text"], input[type="number"], select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  font: inherit;
  width: 110px;
}
input[type="number"] { width: 80px; }
input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); }
input:focus, select:focus { outline: none; border-color: var(--accent); }
input.invalid, select.invalid { border-color: var(--err); background: #2b1d1c; }

.note-raw { color: var(--muted); font-size: 11.5px; min-width: 34px; text-align: right; }
.field-error { grid-column: 1 / -1; color: var(--err); font-size: 11.5px; text-align: right; }

.subhead {
  margin-top: 4px;
  padding-top: 6px;
  border-top: 1px dashed var(--border);
}

.hint { color: var(--muted); font-size: 12px; }

/* ---- fade curve preview & Bézier editor ---- */
.fade-extras { display: flex; flex-direction: column; gap: 7px; margin-top: 2px; }
.fade-curve-row { display: flex; align-items: flex-start; gap: 12px; }
.fade-curve-svg {
  width: 150px;
  height: 150px;       /* kept square so plot units map 1:1 in both axes */
  flex-shrink: 0;
  touch-action: none;  /* drag the handles, don't scroll the page */
}
.curve-frame { fill: var(--panel-2); stroke: var(--border); }
.curve-ref { stroke: var(--border); stroke-dasharray: 3 3; }
.curve-path { stroke: var(--accent); stroke-width: 2; fill: none; }
.curve-label { fill: var(--muted); font-size: 9px; }
.control-arm { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 2 2; }
.bezier-handle { fill: var(--led-on); stroke: #000; cursor: grab; }
.bezier-handle:active { cursor: grabbing; }
.bez-nums {
  display: grid;
  grid-template-columns: auto auto;
  gap: 5px 8px;
  align-items: center;
}
.bez-label { color: var(--muted); font-size: 12px; }
input.bez-num { width: 64px; }

/* Live fade value (status.fades) — hidden while disconnected. */
.fade-live { margin-top: 2px; padding-top: 7px; border-top: 1px dashed var(--border); }

/* ---- secondary (hold) action, same card, below a divider ---- */
.secondary {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.secondary-head { display: flex; align-items: center; gap: 8px; }
.secondary-title { flex: 1; font-size: 12.5px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.secondary-toggle { padding: 3px 10px; font-size: 12.5px; }
.secondary-head:only-child .secondary-toggle { margin-left: auto; }
.secondary-type { display: flex; align-items: center; gap: 8px; }
.secondary-type-label { flex: 1; color: var(--muted); font-size: 12.5px; }

/* ---- expression panel ---- */
#expression-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px 14px;
}
.exp-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
/* Divider between the pedal settings and the default effect. */
.exp-default-col {
  padding-left: 24px;
  border-left: 1px solid var(--border);
}
@media (max-width: 720px) {
  .exp-columns { grid-template-columns: 1fr; }
  .exp-default-col {
    padding-left: 0;
    border-left: none;
    padding-top: 14px;
    border-top: 1px solid var(--border);
  }
}
.col-title {
  font-size: 12.5px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 10px;
}
.exp-live { margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--border); }
.exp-settings { display: flex; flex-direction: column; gap: 7px; }

.exp-live { display: flex; flex-direction: column; gap: 10px; }
.live-row { display: flex; align-items: center; gap: 10px; }
.live-label { color: var(--muted); font-size: 12.5px; width: 84px; flex-shrink: 0; }
.live-val { font-variant-numeric: tabular-nums; font-size: 12.5px; }
.bar {
  flex: 1;
  height: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 90ms linear;
}
.bar-fill.sent { background: var(--led-on); }

.exp-settings-col { display: flex; flex-direction: column; gap: 7px; }
.cal-row {
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}
.cal-row button { padding: 3px 10px; font-size: 12.5px; }

/* ---- pedal range dialog ---- */
#cal-dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px 16px;
  width: min(520px, calc(100vw - 32px));
  font: inherit;
}
#cal-dialog::backdrop { background: rgba(0, 0, 0, 0.55); }
#cal-dialog h2 { margin-bottom: 6px; }
#cal-dialog p.hint { margin: 0 0 14px; }
#cal-dialog .notice { margin: 12px 0 0; }

.cal-live, .cal-preview { display: flex; align-items: center; gap: 10px; margin: 12px 0; }
.cal-preview { margin-top: 14px; }

.cal-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--border);
}
.cal-step-text { flex: 1; display: flex; flex-direction: column; gap: 1px; }
.cal-step-text strong { font-weight: 600; font-size: 13px; }
.cal-step input[type="number"] { width: 78px; }

.cal-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* ---- general settings ---- */
#general-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px 14px;
}
.general-settings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 7px 24px;
  margin-bottom: 8px;
}

/* ---- preset bar ---- */
#preset-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
}
.preset-name-label { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12.5px; }
#preset-name { width: 200px; }
.spacer { flex: 1; }

footer { color: var(--muted); font-size: 11.5px; margin-top: 10px; }

/* ---- help dialog ---- */
#help-dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  width: min(960px, calc(100vw - 32px));
  height: min(80vh, 900px);
  font: inherit;
  overflow: hidden;
}
#help-dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
.help-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
}
.help-head h2 { flex: 1; margin: 0; color: var(--text); }
.help-body {
  display: grid;
  grid-template-columns: 240px 1fr;
  height: calc(100% - 49px);
  min-height: 0;
}
.help-toc {
  overflow-y: auto;
  padding: 14px 12px 24px 18px;
  border-right: 1px solid var(--border);
  font-size: 12.5px;
}
.help-toc strong { display: block; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.help-toc ol { margin: 0; padding-left: 18px; }
.help-toc ol ol { padding-left: 14px; margin: 3px 0 6px; }
.help-toc li { margin: 3px 0; }
.help-toc a { color: var(--text); text-decoration: none; }
.help-toc a:hover { color: var(--accent); text-decoration: underline; }
.help-content {
  overflow-y: auto;
  padding: 14px 22px 60px;
  scroll-behavior: smooth;
}
.help-content h3 {
  font-size: 15px;
  margin: 24px 0 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.help-content h3:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.help-content h4 { font-size: 13.5px; margin: 18px 0 6px; color: var(--accent); }
.help-content p, .help-content li { font-size: 13px; }
.help-content dl { margin: 6px 0 12px; }
.help-content dt { font-weight: 600; font-size: 13px; margin-top: 9px; }
.help-content dd { margin: 2px 0 0 16px; color: var(--text); font-size: 13px; }
.help-content code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 4px;
  font-size: 12px;
}
.help-content a { color: var(--accent); }
@media (max-width: 720px) {
  .help-body { grid-template-columns: 1fr; }
  .help-toc { border-right: none; border-bottom: 1px solid var(--border); max-height: 30%; }
}

/* ---- overlap warnings (advisory, never blocking) ---- */
.notice.warn-notice { border-left-color: var(--warn); }
#warnings ul { margin: 4px 0 0; padding-left: 18px; }
#warnings li { font-size: 12.5px; margin: 3px 0; }
#warnings strong { font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--warn); }
/* Amber, so it reads as "look at this" rather than the red of a real error.
   An input that is both invalid and overlapping shows the error colour. */
input.warn, select.warn { border-color: var(--warn); }
input.invalid, select.invalid { border-color: var(--err); background: #2b1d1c; }