:root {
  --bg: #08090B;
  --panel: #0C0E12;
  --panel-2: #101319;
  --line: rgba(255,255,255,.08);
  --text: #EAF1F4;
  --muted: #7B8791;
  --muted-2: #5A646E;
  --accent: #C9FF2E;
  --accent-2: #5AA2FF;
  --l1: #C9FF2E;
  --l2: #5AA2FF;
  --l3: #FF6B6B;
  --danger: #FF6B6B;
  --radius: 16px;
  --scrollbar-thumb: rgba(234,241,244,.16);
  --scrollbar-thumb-hover: var(--accent);
}

:root[data-theme="light"] {
  --bg: #F4F6F8;
  --panel: #FFFFFF;
  --panel-2: #FAFBFC;
  --line: rgba(10,14,20,.10);
  --text: #12161B;
  --muted: #5A646E;
  --scrollbar-thumb: rgba(10,14,20,.16);
  --muted-2: #838E99;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
}

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Scrollbars ---------- */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-track {
  background: transparent;
}
*::-webkit-scrollbar-thumb {
  background-color: var(--scrollbar-thumb);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover {
  background-color: var(--scrollbar-thumb-hover);
}
*::-webkit-scrollbar-corner {
  background: transparent;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--text); }

.caps {
  font-family: 'Cinzel', serif;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-size: 11px;
  color: var(--accent);
}

/* ---------- App shell ---------- */

#ac-app {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

#ac-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
}

#ac-header h1 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

#ac-header .subtitle {
  color: var(--muted);
  font-size: .78rem;
  margin-top: 2px;
}

#ac-sidebar {
  border-right: 1px solid var(--line);
  padding: 20px;
  overflow-y: auto;
  max-height: calc(100vh - 66px);
  position: sticky;
  top: 66px;
  align-self: start;
}

#ac-main {
  padding: 24px;
  min-width: 0;
}

/* ---------- Panels / cards ---------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 16px;
}

.panel-title {
  font-family: 'Cinzel', serif;
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px 0;
}

.phase-panel[data-phase="L1"] { box-shadow: inset 3px 0 0 var(--l1); }
.phase-panel[data-phase="L2"] { box-shadow: inset 3px 0 0 var(--l2); }
.phase-panel[data-phase="L3"] { box-shadow: inset 3px 0 0 var(--l3); }

.phase-panel { transition: box-shadow .25s; }
.phase-panel:hover { box-shadow: inset 3px 0 0 currentColor, 0 8px 28px rgba(0,0,0,.35); }

/* ---------- Form controls ---------- */

.field { margin-bottom: 10px; }
.field label {
  display: flex;
  justify-content: space-between;
  font-size: .74rem;
  color: var(--muted);
  margin-bottom: 4px;
}
.field label .val { color: var(--text); font-variant-numeric: tabular-nums; }

input[type="range"], input[type="checkbox"] {
  accent-color: var(--accent);
}

input[type="range"] {
  width: 100%;
  background: transparent;
}

input[type="number"], select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 5px 8px;
  font-family: inherit;
  font-size: .8rem;
}

.field-row { display: flex; gap: 8px; align-items: center; }
.field-row input[type="range"] { flex: 1; }
.field-row input[type="number"] { width: 70px; flex: none; }

.checkbox-row {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; margin-bottom: 8px;
}

button {
  font-family: inherit;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: .78rem;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
button:hover { border-color: var(--accent); color: var(--accent); }
button.primary { background: var(--accent); color: #08090B; border-color: var(--accent); font-weight: 600; }
button.primary:hover { color: #08090B; opacity: .88; }

/* ---------- Tabs ---------- */

#ac-tabs {
  display: flex; gap: 4px; flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}
.tab-btn {
  background: transparent; border: none; border-bottom: 2px solid transparent;
  color: var(--muted); padding: 10px 14px; border-radius: 0;
  font-family: 'Cinzel', serif; font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase;
}
.tab-btn:hover { color: var(--text); border-color: transparent; }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Info tooltip ---------- */

.info-dot {
  display: inline-flex; align-items: center; justify-content: center;
  width: 15px; height: 15px; border-radius: 50%;
  border: 1px solid var(--muted-2); color: var(--muted-2);
  font-size: 10px; cursor: help; margin-left: 6px;
}
.info-dot:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Readouts ---------- */

.readout-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}
.readout {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px;
}
.readout .k { font-size: .68rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.readout .v { font-size: 1.15rem; font-weight: 600; font-variant-numeric: tabular-nums; margin-top: 2px; }
.readout .v.warn { color: var(--l3); }

.note {
  font-size: .76rem; color: var(--muted); line-height: 1.5;
  border-left: 2px solid var(--accent-2); padding-left: 10px; margin: 10px 0;
}

canvas { max-width: 100%; }

/* ---------- Footer (kept consistent with the rest of the site) ---------- */

footer {
  grid-column: 1 / -1;
  margin-top: 20px;
  padding: 16px;
  font-size: 0.78rem;
  color: var(--muted-2);
  text-align: center;
  border-top: 1px solid var(--line);
}
footer a { color: inherit; text-decoration: none; font-weight: inherit; }
footer a:hover { color: var(--accent); }

@media (max-width: 900px) {
  #ac-app { grid-template-columns: 1fr; }
  #ac-sidebar {
    position: static; max-height: none; border-right: none;
    border-bottom: 1px solid var(--line);
  }
}