:root {
  --bg: #0f1219;
  --panel: #1a1f2c;
  --text: #e4e8f0;
  --muted: #6b7785;
  --border: rgba(255, 255, 255, 0.1);
  --primary: #4f8ff7;
  --primary-dark: #6ba3ff;
  --danger: #ef5350;
  --ok: #34d399;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  --surface: #1c2230;
  --hover: #242b3a;
  --sidebar-bg: #131720;
  --topbar-bg: #0c0f16;
  --canvas-bg: #0b0e14;
  --input-bg: var(--bg);
  --btn-bg: var(--surface);
  --btn-color: var(--btn-color);
  --btn-border: rgba(255,255,255,0.12);
  --btn-hover-bg: var(--hover);
  --modal-bg: var(--surface);
  --label-color: var(--label-color);
  --subhead-color: var(--label-color);
  --table-hover: rgba(79,143,247,0.04);
  --scrollbar-thumb: rgba(255,255,255,0.1);
  --pill-admin-bg: rgba(79,143,247,0.15);
  --pill-admin-color: var(--primary);
  --pill-sales-bg: rgba(52,211,153,0.15);
  --pill-sales-color: #34d399;
  --pill-support-bg: rgba(251,191,36,0.15);
  --pill-support-color: #fbbf24;
  --pill-disabled-bg: rgba(239,83,80,0.15);
  --pill-disabled-color: var(--danger);
  --overlay-bg: rgba(0,0,0,0.6);
  --user-row-bg: var(--surface);
  --asset-symbol-bg: rgba(79,143,247,0.15);
  --asset-symbol-color: var(--primary);
  --nav-btn-bg: rgba(26,31,44,0.9);
  --active-btn-bg: rgba(79,143,247,0.15);
  --danger-btn-bg: rgba(239,83,80,0.08);
  --danger-btn-border: rgba(239,83,80,0.3);
  --total-card-bg: var(--surface);
  --total-card-border: rgba(255,255,255,0.08);
  --placeholder-color: var(--placeholder-color);
}

[data-theme="light"] {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #6b7785;
  --border: #d8dee7;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --danger: #b91c1c;
  --ok: #047857;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
  --surface: #ffffff;
  --hover: #f1f5f9;
  --sidebar-bg: #edf2f7;
  --topbar-bg: #0f172a;
  --canvas-bg: #f0f0f0;
  --input-bg: #fff;
  --btn-bg: #fff;
  --btn-color: #17202a;
  --btn-border: #d8dee7;
  --btn-hover-bg: #f8fafc;
  --modal-bg: #fff;
  --label-color: #334155;
  --subhead-color: #334155;
  --table-hover: rgba(37,99,235,0.04);
  --scrollbar-thumb: rgba(0,0,0,0.12);
  --pill-admin-bg: #dbeafe;
  --pill-admin-color: #1e40af;
  --pill-sales-bg: #d1fae5;
  --pill-sales-color: #065f46;
  --pill-support-bg: #fef3c7;
  --pill-support-color: #92400e;
  --pill-disabled-bg: #fee2e2;
  --pill-disabled-color: #991b1b;
  --overlay-bg: rgba(15,23,42,0.72);
  --user-row-bg: #f8fafc;
  --asset-symbol-bg: #e2e8f0;
  --asset-symbol-color: #0f172a;
  --nav-btn-bg: rgba(255,255,255,0.88);
  --active-btn-bg: #dbeafe;
  --danger-btn-bg: transparent;
  --danger-btn-border: #fecaca;
  --total-card-bg: #f8fafc;
  --total-card-border: #d8dee7;
  --placeholder-color: #94a3b8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--input-bg);
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

button, input, select, textarea {
  font: inherit;
}

button, .buttonish {
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-color);
  padding: 0.5rem 0.65rem;
  border-radius: 0.55rem;
  cursor: pointer;
  user-select: none;
  line-height: 1;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

button:hover, .buttonish:hover {
  border-color: rgba(255,255,255,0.2);
  background: var(--btn-hover-bg);
  color: var(--text);
}

button:active { transform: scale(0.97); }

button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

button.primary:hover {
  background: var(--primary-dark);
}

button.danger {
  border-color: var(--danger-btn-border);
  color: var(--danger);
  background: var(--danger-btn-bg);
}

button.active, .tool-btn.active {
  background: var(--active-btn-bg);
  border-color: var(--primary);
  color: var(--primary);
}

input, select, textarea {
  width: 100%;
  margin-top: 0.35rem;
  border: 1px solid var(--btn-border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.6rem;
  background: var(--input-bg);
  color: var(--text);
  transition: border-color 0.15s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 143, 247, 0.2);
}

input::placeholder, textarea::placeholder { color: var(--placeholder-color); }

input[type="checkbox"] {
  width: auto;
  margin: 0;
  accent-color: var(--primary);
}

select { cursor: pointer; }

label {
  display: block;
  font-size: 0.9rem;
  color: var(--label-color);
  margin-bottom: 0.85rem;
}

h1, h2, h3 {
  margin-top: 0;
  color: var(--text);
}

h1 { font-size: 1.35rem; }
h2 { font-size: 1rem; margin-bottom: 0.75rem; }
h3 { font-size: 0.95rem; margin-bottom: 0.5rem; }

summary { cursor: pointer; color: var(--primary); font-weight: 600; }
summary:hover { color: var(--primary-dark); }

.hidden { display: none !important; }
.muted { color: var(--muted); }
.small-note { color: var(--muted); font-size: 0.8rem; line-height: 1.35; }
.row { display: flex; align-items: center; }
.gap { gap: 0.5rem; }
.spread { justify-content: space-between; }
.stack { display: flex; flex-direction: column; }
.compact label { margin-bottom: 0.55rem; }

.topbar {
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  background: var(--topbar-bg);
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.topbar button, .topbar .buttonish {
  background: #1a2030;
  color: var(--btn-color);
  border-color: rgba(255,255,255,0.1);
}

.topbar button:hover, .topbar .buttonish:hover {
  background: #2a3245;
  color: #fff;
}

.topbar button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.45rem;
  margin-left: 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--asset-symbol-bg);
  color: var(--primary);
  border: 1px solid rgba(79,143,247,0.2);
}

.app-shell {
  height: calc(100vh - 58px);
  display: grid;
  grid-template-columns: 310px minmax(480px, 1fr) 380px;
  overflow: hidden;
}

.sidebar {
  overflow: auto;
  padding: 0.75rem;
  background: var(--sidebar-bg);
  border-right: 1px solid rgba(255,255,255,0.06);
}

.sidebar.right {
  border-right: 0;
  border-left: 1px solid rgba(255,255,255,0.06);
}

.panel {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 0.85rem;
  padding: 0.85rem;
  margin-bottom: 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
}

.asset-palette {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.asset-chip {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  text-align: left;
  padding: 0.45rem;
  border-radius: 0.5rem;
  background: var(--btn-bg);
  border: 1px solid rgba(255,255,255,0.06);
  transition: background 0.15s;
}

.asset-chip:hover {
  background: var(--btn-hover-bg);
}

.asset-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  padding: 0 0.25rem;
  border-radius: 999px;
  background: var(--asset-symbol-bg);
  color: var(--primary);
  font-weight: 800;
  font-size: 0.75rem;
}

.asset-meta {
  color: var(--muted);
  font-size: 0.75rem;
}

.workspace {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--input-bg);
}

.canvas-toolbar {
  height: 42px;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 0.8rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: var(--sidebar-bg);
  color: var(--muted);
  font-size: 0.82rem;
}

.canvas-wrap {
  position: relative;
  flex: 1;
  overflow: hidden;
  background-color: var(--canvas-bg);
  background-image: radial-gradient(rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 20px 20px;
}

#planCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.empty-hint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  pointer-events: none;
}

.empty-hint h2 {
  color: var(--label-color);
  font-size: 1.35rem;
}

.selection-panel dl {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.35rem 0.5rem;
  margin: 0.6rem 0;
}

.selection-panel dt { color: var(--muted); }
.selection-panel dd { margin: 0; color: var(--text); }

.inline-check {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0.35rem 0;
}

.estimate-panel {
  overflow-x: auto;
}

.estimate-panel .estimate-table {
  min-width: 760px;
}

.estimate-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.estimate-table th,
.estimate-table td {
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 0.4rem 0.25rem;
  text-align: right;
  vertical-align: top;
}

.estimate-table th:first-child,
.estimate-table td:first-child {
  text-align: left;
}

.estimate-table th {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--label-color);
  font-weight: 600;
}

.estimate-table tbody tr:hover td {
  background: var(--table-hover);
}

.total-card {
  margin-top: 0.75rem;
  padding: 0.7rem;
  border-radius: 0.75rem;
  background: var(--btn-bg);
  border: 1px solid var(--total-card-border);
}

.total-line {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.25rem;
}

.total-line span { color: #96a0b5; }

.total-line.final {
  font-size: 1.1rem;
  font-weight: 800;
  margin-top: 0.5rem;
  border-top: 2px solid var(--primary);
  padding-top: 0.5rem;
}

.total-line.final span { color: var(--text); }

.project-list button {
  width: 100%;
  text-align: left;
  margin-bottom: 0.45rem;
}

.project-list .project-item-title { font-weight: 700; }
.project-list .project-item-meta { font-size: 0.75rem; color: var(--muted); margin-top: 0.15rem; }

.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--overlay-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 1rem;
}

.modal {
  width: min(460px, 100%);
  background: var(--btn-bg);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  background: var(--btn-bg);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: var(--shadow);
  z-index: 60;
  max-width: min(720px, calc(100vw - 2rem));
  text-align: center;
}

@media (max-width: 1150px) {
  .app-shell {
    grid-template-columns: 280px minmax(380px, 1fr);
  }

  .sidebar.right {
    position: fixed;
    right: 0;
    top: 58px;
    bottom: 0;
    width: min(380px, 94vw);
    z-index: 20;
    box-shadow: var(--shadow);
  }
}

@media print {
  :root {
    --bg: #fff; --panel: #fff; --text: #111; --muted: #888;
    --border: #ddd; --surface: #f8f9fa; --hover: #f0f0f0;
  }
  .topbar, .sidebar.left, .workspace, .panel:not(.estimate-panel) { display: none !important; }
  .app-shell { display: block; height: auto; }
  .sidebar.right { position: static; width: auto; border: 0; background: #fff; overflow: visible; }
  .panel { box-shadow: none; border: 1px solid #eee; }
}

.pricing-editor {
  margin: 0.65rem 0;
  overflow-x: auto;
}

.pricing-editor input {
  min-width: 64px;
  padding: 0.35rem;
  margin: 0;
  font-size: 0.8rem;
}

.section-subhead {
  margin: 0.8rem 0 0.35rem;
  color: var(--label-color);
}

.bom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin: 0.55rem 0 0.8rem;
}

.bom-grid label {
  margin-bottom: 0;
  font-size: 0.78rem;
}

.bom-grid input {
  padding: 0.35rem;
  margin-top: 0.25rem;
}

.material-table input {
  min-width: 60px;
}

.estimate-panel {
  overflow-x: auto;
}

/* ── Canvas nav controls ── */

.canvas-nav {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  user-select: none;
}

.nav-row {
  display: flex;
  align-items: center;
}

.nav-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  margin: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  font-size: 0.88rem;
  font-weight: 700;
  background: var(--nav-btn-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--btn-border);
  color: var(--label-color);
  cursor: pointer;
  line-height: 1;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  transition: all 0.12s;
}

.nav-btn:hover {
  background: rgba(79,143,247,0.2);
  border-color: var(--primary);
  color: var(--primary);
}

.nav-btn:active {
  background: rgba(79,143,247,0.3);
  transform: scale(0.93);
}

.nav-center { font-size: 1.05rem; }

.nav-zoom {
  display: flex;
  gap: 2px;
  margin-top: 4px;
}

.nav-zoom .nav-btn {
  width: 36px;
  font-size: 1.1rem;
}

/* ── User management modal ── */

.modal.wide {
  width: min(720px, 100%);
  max-height: 90vh;
  overflow-y: auto;
}

.user-form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.5rem;
  align-items: end;
  margin-bottom: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.user-form label { margin-bottom: 0; font-size: 0.82rem; }

.user-form button {
  height: 2.3rem;
  white-space: nowrap;
  align-self: end;
}

.user-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.user-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.55rem;
  align-items: center;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--total-card-border);
  border-radius: 0.65rem;
  background: var(--btn-bg);
}

.user-info { min-width: 0; }
.user-name { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.user-meta { font-size: 0.78rem; color: var(--muted); margin-top: 0.15rem; }

.user-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.user-controls select,
.user-controls button {
  margin: 0;
  padding: 0.3rem 0.5rem;
  font-size: 0.78rem;
}

.pill {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.pill.admin { background: var(--pill-admin-bg); color: var(--pill-admin-color); }
.pill.sales { background: var(--pill-sales-bg); color: var(--pill-sales-color); }
.pill.support { background: var(--pill-support-bg); color: var(--pill-support-color); }
.pill.disabled { background: var(--pill-disabled-bg); color: var(--pill-disabled-color); }

.badge.you {
  background: var(--primary);
  color: #fff;
  margin-left: 0.25rem;
  padding: 0.1rem 0.4rem;
  font-size: 0.68rem;
  border-radius: 999px;
}

#currentUserBadge {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
}

@media (max-width: 720px) {
  .user-form {
    grid-template-columns: 1fr 1fr;
  }
  .user-row {
    grid-template-columns: 1fr;
  }
  .user-controls {
    justify-content: flex-start;
  }
}

/* ── Tab system ── */
.tab-bar { display: flex; gap: 2px; margin-right: 1rem; }
.tab-btn { padding: 0.3rem 0.75rem; border: 1px solid var(--btn-border, rgba(255,255,255,0.12)); border-radius: 0.4rem 0.4rem 0 0; background: transparent; color: var(--muted); font-size: 0.78rem; font-weight: 600; cursor: pointer; border-bottom: 2px solid transparent; transition: all 0.15s; }
.tab-btn:hover { color: var(--text); background: var(--hover, #242b3a); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); background: var(--surface, #1c2230); }

/* ── Equipment design tools ── */
.etool-btn { font-size: 0.8rem; }
.etool-btn.active { background: var(--active-btn-bg, rgba(79,143,247,0.15)); border-color: var(--primary); color: var(--primary); }