:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #d1d5db;
  --accent: #0f766e;
  --danger: #b91c1c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #ffffff 0%, #eef2ff 50%, #e5e7eb 100%);
}

.app {
  display: grid;
  grid-template-columns: 380px 1fr;
  height: 100vh;
  gap: 12px;
  padding: 12px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  overflow: auto;
}

h1 {
  margin: 0;
  font-size: 1.4rem;
}

.brand-credit {
  display: block;
  margin-top: 2px;
  font-size: 0.74rem;
  font-weight: 500;
  color: #6b7280;
}

.subtitle {
  margin-top: 6px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.93rem;
}

.status-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid #dbe4ea;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.78rem;
  background: #f8fafc;
  color: #0f172a;
}

.chip.warn {
  background: #fff7ed;
  border-color: #fed7aa;
  color: #9a3412;
}

.chip.ok {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #065f46;
}

.card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 10px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.row.stretch {
  align-items: stretch;
}

.row.stretch > button {
  flex: 1;
}

label {
  font-size: 0.88rem;
  color: #374151;
}

input[type="number"],
input[type="text"],
button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 8px;
  font-size: 0.88rem;
  background: #fff;
}

input[type="number"],
input[type="text"] {
  width: 100%;
}

button {
  cursor: pointer;
  transition: 0.15s ease;
}

button:hover {
  border-color: #9ca3af;
  background: #f9fafb;
}

button.active {
  background: #ecfeff;
  border-color: var(--accent);
  color: #115e59;
  font-weight: 600;
}

button.primary {
  background: #0f766e;
  border-color: #0f766e;
  color: #ffffff;
  font-weight: 600;
}

button.primary:hover {
  background: #0d665f;
  border-color: #0d665f;
}

button.danger {
  color: var(--danger);
  border-color: #fecaca;
  background: #fff1f2;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 30px;
  padding: 0;
}

.icon-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.trash-btn {
  font-size: 0;
}

.quota-btn {
  color: #0f766e;
  border-color: #99f6e4;
  background: #f0fdfa;
  font-size: 0;
}

.quota-btn.on {
  color: #ffffff;
  border-color: #0f766e;
  background: #0f766e;
}

.quota-btn.on:hover {
  color: #ffffff;
  border-color: #0d665f;
  background: #0d665f;
}

.actions-cell {
  display: flex;
  align-items: center;
  gap: 6px;
}

.muted {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 4px 0;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}

.drop-zone {
  border: 2px dashed #cbd5e1;
  border-radius: 10px;
  padding: 12px;
  text-align: center;
  background: #f8fafc;
  margin-bottom: 8px;
  transition: 0.2s ease;
  cursor: pointer;
}

.drop-zone p {
  margin: 0 0 8px;
  font-size: 0.85rem;
  color: #475569;
}

.drop-zone.dragover {
  border-color: #0f766e;
  background: #ecfeff;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.areas-wrap {
  max-height: 180px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

#areasTable {
  width: 100%;
  border-collapse: collapse;
}

#areasTable th,
#areasTable td {
  padding: 6px;
  border-bottom: 1px solid #eef2f7;
  text-align: left;
  vertical-align: middle;
  font-size: 0.85rem;
}

#areasTable th {
  position: sticky;
  top: 0;
  background: #f9fafb;
}

.name-input {
  width: 100%;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 5px;
  font-size: 0.83rem;
}

.total {
  margin: 8px 0;
  font-weight: 700;
}

.canvas-area {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 40;
}

.modal-card {
  width: min(560px, 96vw);
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.22);
}

.modal-card h3 {
  margin: 0 0 8px;
  font-size: 1.04rem;
}

.modal-actions {
  margin-top: 8px;
  margin-bottom: 0;
}

#drawCanvas {
  width: 100%;
  height: 100%;
  display: block;
  background: repeating-linear-gradient(
    45deg,
    #fafafa,
    #fafafa 10px,
    #f6f7f9 10px,
    #f6f7f9 20px
  );
}

@media (max-width: 980px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    height: 100dvh;
  }

  .panel {
    max-height: 48dvh;
  }
}