:root {
  --bg:        #000000;
  --panel:     #0a0a0a;
  --panel-2:   #111111;
  --line:      #1d1d1d;
  --text:      #f5f5f5;
  --muted:     #7a7a7a;
  --dim:       #4a4a4a;
}

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

html, body { height: 100%; overflow: hidden; }

body {
  font-family: 'Space Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  display: grid;
  grid-template-columns: 400px 1fr;
  height: 100vh;
}

/* ============ SIDEBAR ============ */
.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}
.brand-mark {
  font-size: 28px;
  color: var(--accent, #ffd76b);
  line-height: 1;
}
.brand h1 {
  font-size: 14px;
  letter-spacing: 0.12em;
  font-weight: 700;
}
.brand-sub {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
label {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

input[type="text"], input[type="number"], input[type="date"] {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  padding: 9px 11px;
  border-radius: 6px;
  width: 100%;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input[type="text"]:focus, input[type="number"]:focus, input[type="date"]:focus {
  border-color: #333;
  box-shadow: 0 0 0 2px rgba(255,255,255,0.05);
}

/* dark date picker — swatch + dropdown indicators */
input[type="date"] {
  color-scheme: dark;
  cursor: pointer;
}
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.7);
  cursor: pointer;
}
input[type="date"]::-webkit-calendar-picker-indicator:hover {
  filter: invert(1);
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}
input[type="number"] { -moz-appearance: textfield; }

input::placeholder { color: var(--dim); }

.divider {
  height: 1px;
  background: var(--line);
  margin: 2px 0;
}

.help {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.55;
}
.help b { color: var(--text); font-weight: 700; }

/* ---- attribute rows ---- */
.attr-list { display: flex; flex-direction: column; gap: 12px; }

.attr {
  border: 1px solid var(--line);
  border-left: 3px solid var(--c);
  border-radius: 6px;
  padding: 11px 13px;
  background: var(--panel-2);
}
.attr-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.attr-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
}
.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--c);
}
.mute-btn {
  background: none; border: none; cursor: pointer;
  color: var(--dim); font-family: inherit; font-size: 14px;
  padding: 2px 6px; border-radius: 4px; line-height: 1;
}
.mute-btn:hover { color: var(--text); background: #1a1a1a; }
.attr.muted { opacity: 0.4; }

/* four-column grid: ready / peak start / peak end (opt) / decline */
/* four-column grid: ready / peak start / peak end (opt) / decline */
.quad {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 8px;
}
.quad .field-group { min-width: 0; }
.quad .field-group label {
  font-size: 9px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.quad .opt {
  font-size: 8px; color: var(--dim);
  font-weight: 400; letter-spacing: 0;
  margin-left: 2px;
}
.quad input { padding: 8px 7px; font-size: 12px; }

/* ---- buttons ---- */
.btn {
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 11px 14px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  transition: all .15s;
}
.btn:hover { border-color: #333; background: #161616; }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--text);
  color: #000;
  border-color: var(--text);
  font-weight: 700;
}
.btn.primary:hover { background: #ddd; border-color: #ddd; }
.btn.ghost { color: var(--muted); }
.btn.small { padding: 8px 11px; font-size: 11px; }

/* ---- advanced dropdown ---- */
.adv-toggle {
  background: none; border: none; cursor: pointer;
  font-family: inherit; font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); padding: 6px 0; text-align: left;
  display: flex; align-items: center; gap: 8px;
}
.adv-toggle:hover { color: var(--text); }
.adv-toggle .caret {
  display: inline-block; transition: transform .15s;
  font-size: 10px;
}
.adv-toggle.open .caret { transform: rotate(90deg); }

/* IMPORTANT: when hidden, keep display:none — don't override */
.adv-panel[hidden] { display: none; }
.adv-panel {
  display: flex; flex-direction: column; gap: 12px;
  padding: 4px 0;
}
.adv-hint { font-size: 11px; color: var(--muted); }

.color-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.color-cell {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
}
.color-cell label {
  font-size: 10px; text-transform: none; letter-spacing: 0.02em;
  color: var(--text); flex: 1; cursor: pointer;
}
.color-cell input[type="color"] {
  -webkit-appearance: none; appearance: none;
  width: 28px; height: 22px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: none; cursor: pointer; padding: 0;
}
.color-cell input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.color-cell input[type="color"]::-webkit-color-swatch { border: none; border-radius: 3px; }
.color-cell input[type="color"]::-moz-color-swatch { border: none; border-radius: 3px; }

/* ============ MAIN ============ */
.main {
  padding: 24px 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: 100vh;
  overflow: hidden;
}
.main-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
}
.main-header h2 {
  font-size: 16px;
  letter-spacing: 0.16em;
  font-weight: 700;
}
.axis-note { font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }

.canvas-wrap {
  flex: 1;
  background: #050505;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  min-height: 0;
}
canvas { display: block; width: 100%; height: 100%; }

.caption {
  font-size: 11px;
  color: var(--muted);
  flex-shrink: 0;
}
.caption b { color: var(--text); font-weight: 700; }

/* ============ toast ============ */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1a1a1a;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent, #ffd76b);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  padding: 11px 18px;
  border-radius: 6px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 100;
  max-width: 90vw;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============ responsive ============ */
@media (max-width: 820px) {
  html, body { overflow: auto; }
  .app { grid-template-columns: 1fr; height: auto; min-height: 100vh; }
  .sidebar {
    max-height: none; height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 20px 18px;
  }
  .main {
    padding: 18px;
    height: auto;
    min-height: 70vh;
  }
  .canvas-wrap { min-height: 60vh; }
  .main-header { flex-wrap: wrap; }
}

@media (max-width: 480px) {
  body { font-size: 13px; }
  .brand h1 { font-size: 13px; }
  .canvas-wrap { min-height: 50vh; }
  .quad { grid-template-columns: 1fr 1fr; gap: 8px; }
  .color-grid { grid-template-columns: 1fr; }
}
</style>