@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700&family=Barlow:wght@400;500;600&display=swap');

:root {
  --black: #14140f;
  --white: #ffffff;
  --green: #15803d;
  --green-dark: #0f5c2c;
  --g100: #f5f5f2;
  --g200: #e7e6e0;
  --g300: #d3d1c8;
  --g400: #a8a69b;
  --g500: #6f6d63;
  --g600: #3a392f;
  --danger: #b91c1c;
  --easing: cubic-bezier(.4, 0, .2, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--g100);
  color: var(--black);
  font-family: 'Barlow', sans-serif;
}

h1, h2, h3, .heading {
  font-family: 'Barlow Condensed', sans-serif;
  text-transform: uppercase;
  letter-spacing: .03em;
  font-weight: 700;
}

button, input, select {
  font-family: inherit;
  border-radius: 0;
}

#app {
  display: grid;
  grid-template-rows: 52px 1fr 28px;
  grid-template-columns: 260px 1fr 280px;
  grid-template-areas:
    "topbar topbar topbar"
    "left   canvas right"
    "status status status";
  height: 100%;
  width: 100%;
}

/* Topbar */
#topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 12px;
  background: var(--black);
  color: var(--white);
  border-bottom: 2px solid var(--green);
}

#topbar .brand {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-right: 16px;
  white-space: nowrap;
}

#topbar .brand span { color: var(--green); }

.tool-group {
  display: flex;
  gap: 2px;
  padding: 0 10px;
  border-right: 1px solid var(--g600);
  margin-right: 6px;
}

.tool-group:last-of-type { border-right: none; }

.tbtn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--g200);
  padding: 7px 10px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s var(--easing), color .15s var(--easing);
  white-space: nowrap;
}

.tbtn:hover { background: var(--g600); color: var(--white); }
.tbtn.active { background: var(--green); color: var(--white); border-color: var(--green); }
.tbtn:disabled { opacity: .35; cursor: not-allowed; }

.spacer { flex: 1; }

.tbtn.primary { background: var(--green); color: var(--white); }
.tbtn.primary:hover { background: var(--green-dark); }

/* Sidebars */
#left, #right {
  overflow-y: auto;
  background: var(--white);
  border-color: var(--g300);
  padding: 14px;
}
#left { grid-area: left; border-right: 1px solid var(--g300); }
#right { grid-area: right; border-left: 1px solid var(--g300); }

.panel {
  border: 1px solid var(--g300);
  margin-bottom: 14px;
  background: var(--white);
}

.panel > .panel-head {
  background: var(--g100);
  border-bottom: 1px solid var(--g300);
  padding: 7px 10px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--g600);
}

.panel > .panel-body { padding: 10px; }

.field { margin-bottom: 8px; }
.field label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--g500);
  text-transform: uppercase;
  letter-spacing: .03em;
  margin-bottom: 3px;
}
.field input[type=number],
.field input[type=text],
.field select {
  width: 100%;
  padding: 6px 7px;
  border: 1px solid var(--g300);
  font-size: 13px;
  background: var(--white);
}
.field input[type=range] { width: 100%; }
.field-row { display: flex; gap: 8px; }
.field-row .field { flex: 1; }

.btn {
  display: block;
  width: 100%;
  padding: 8px 10px;
  background: var(--green);
  color: var(--white);
  border: none;
  font-weight: 600;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: .03em;
  cursor: pointer;
  transition: background .15s var(--easing);
}
.btn:hover { background: var(--green-dark); }
.btn.ghost { background: transparent; color: var(--black); border: 1px solid var(--g300); }
.btn.ghost:hover { background: var(--g100); }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #8f1717; }

.brush-modes { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin-bottom: 8px; }
.brush-modes .tbtn { color: var(--black); border: 1px solid var(--g300); text-align: center; justify-content: center; }
.brush-modes .tbtn.active { background: var(--green); color: var(--white); border-color: var(--green); }

.swatches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.swatch {
  aspect-ratio: 1;
  border: 2px solid var(--g300);
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.swatch span {
  background: rgba(20,20,15,.72);
  color: var(--white);
  font-size: 9.5px;
  width: 100%;
  padding: 2px 3px;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: .02em;
}
.swatch.active { border-color: var(--green); }

/* Catalog */
.cat-tabs { display: flex; border-bottom: 1px solid var(--g300); margin-bottom: 10px; }
.cat-tab {
  flex: 1;
  padding: 7px 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  text-align: center;
  cursor: pointer;
  color: var(--g500);
  border-bottom: 2px solid transparent;
}
.cat-tab.active { color: var(--green); border-color: var(--green); }

.cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.cat-item {
  border: 1px solid var(--g300);
  cursor: grab;
  padding: 8px 4px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  transition: border-color .15s var(--easing), background .15s var(--easing);
  user-select: none;
}
.cat-item:hover { border-color: var(--green); background: var(--g100); }
.cat-item.armed { border-color: var(--green); background: #e8f3ec; }
.cat-item .swatch-dot {
  width: 26px; height: 26px; border-radius: 50%;
  margin: 0 auto 6px;
  border: 1px solid var(--g300);
}

/* Canvas */
#canvas-wrap { grid-area: canvas; position: relative; background: #cfe0d8; }
#scene { width: 100%; height: 100%; display: block; }

#hint {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: rgba(20,20,15,.78);
  color: var(--white);
  font-size: 12px;
  padding: 7px 10px;
  max-width: 360px;
  pointer-events: none;
}

#measure-readout {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(20,20,15,.78);
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 10px;
  display: none;
}

/* Status bar */
#status {
  grid-area: status;
  background: var(--black);
  color: var(--g300);
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 12px;
}
#status .sep { color: var(--g600); }

/* Toast */
#toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--black);
  color: var(--white);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--easing), transform .2s var(--easing);
  z-index: 50;
  border-left: 3px solid var(--green);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

input[type=file] { display: none; }