/* ═══════════════════════════════════════════════════════════════════
   Easy BOQ v8 — Smart Spreadsheet UI
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #334155;
  --border: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --warn: #f59e0b;
  --danger: #ef4444;
  --cell-bg: #ffffff;
  --cell-text: #1e293b;
  --cell-border: #e2e8f0;
  --cell-selected: #dbeafe;
  --cell-active: #bfdbfe;
  --cell-formula: #f0fdf4;
  --cell-ai: #fef3c7;
  --header-bg: #f1f5f9;
  --header-text: #475569;
  --row-stripe: #f8fafc;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: "Sarabun", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  height: 100%;
}
#root { height: 100vh; display: flex; flex-direction: column; }

/* ── Boot screens ──────────────────────────────────────────────── */
.boot {
  flex: 1 1 auto;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 16px; padding: 24px;
  text-align: center;
}
.boot.loading { color: var(--muted); }
.boot.error { color: var(--danger); }
.boot.gate { color: var(--text); }
.boot h2 { margin: 0; font-size: 22px; }
.boot p { color: var(--muted); max-width: 480px; }

.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--surface-2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  font-family: inherit; font-size: 13px; font-weight: 600;
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--surface); border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 10px; font-size: 12px; }

/* ── Workspace layout ─────────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 52px 1fr;
  grid-template-areas:
    "header header"
    "sidebar content";
  height: 100vh;
  overflow: hidden;
}

.app-header {
  grid-area: header;
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.app-header h1 {
  margin: 0; font-size: 18px; font-weight: 700;
  color: var(--accent);
}
.app-header .spacer { flex: 1; }
.app-header .user {
  display: flex; align-items: center; gap: 8px;
  color: var(--muted); font-size: 13px;
}
.app-header .user .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
}

.sidebar {
  grid-area: sidebar;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 12px;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 8px;
}
.sidebar h3 {
  margin: 0 0 8px 0;
  font-size: 12px; font-weight: 700;
  color: var(--muted); text-transform: uppercase; letter-spacing: 1px;
}
.sidebar .project-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 2px;
}
.sidebar .project-list li {
  padding: 8px 10px;
  font-size: 13px; color: var(--text);
  border-radius: 5px; cursor: pointer;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: background .12s;
}
.sidebar .project-list li:hover { background: var(--surface-2); }
.sidebar .project-list li.active { background: var(--accent); color: #fff; }
.sidebar .project-list .meta {
  display: block;
  font-size: 11px; color: var(--muted);
  margin-top: 2px;
}
.sidebar .project-list li.active .meta { color: rgba(255,255,255,.8); }

.content {
  grid-area: content;
  display: flex; flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

/* ── Project header (toolbar above spreadsheet) ───────────────── */
.project-toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.project-toolbar .meta {
  display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
}
.project-toolbar input,
.project-toolbar select {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 6px 10px;
  font-size: 13px;
}
.project-toolbar .project-name {
  font-size: 16px; font-weight: 700;
  min-width: 240px;
}
.project-toolbar .actions {
  display: flex; gap: 8px; align-items: center;
}
.project-toolbar .save-status {
  font-size: 12px; color: var(--muted);
  display: flex; align-items: center; gap: 6px;
}
.project-toolbar .save-status .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--muted);
}
.project-toolbar .save-status.saved .dot { background: var(--success); }
.project-toolbar .save-status.dirty .dot { background: var(--warn); }
.project-toolbar .save-status.saving .dot { background: var(--accent); animation: spin 1s linear infinite; }

/* ── Formula bar ─────────────────────────────────────────────── */
.formula-bar {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 8px;
  padding: 6px 12px;
  background: var(--cell-bg);
  border-bottom: 1px solid var(--cell-border);
}
.formula-bar .cell-ref {
  font-family: "Consolas", monospace;
  font-size: 13px; font-weight: 700;
  color: var(--cell-text);
  background: var(--header-bg);
  padding: 6px 10px;
  border: 1px solid var(--cell-border);
  border-radius: 4px;
  text-align: center;
}
.formula-bar .formula-input {
  font-family: "Consolas", monospace;
  font-size: 13px;
  padding: 6px 10px;
  border: 1px solid var(--cell-border);
  border-radius: 4px;
  background: var(--cell-bg);
  color: var(--cell-text);
  outline: none;
}
.formula-bar .formula-input:focus { border-color: var(--accent); }

/* ── Spreadsheet ─────────────────────────────────────────────── */
.spreadsheet-wrap {
  flex: 1 1 auto;
  overflow: auto;
  background: var(--cell-bg);
  position: relative;
}
.spreadsheet {
  border-collapse: separate;
  border-spacing: 0;
  width: max-content;
  background: var(--cell-bg);
  color: var(--cell-text);
  font-size: 13px;
}
.spreadsheet thead th {
  background: var(--header-bg);
  color: var(--header-text);
  font-weight: 700;
  padding: 6px 10px;
  border: 1px solid var(--cell-border);
  border-top: none;
  text-align: center;
  position: sticky; top: 0;
  z-index: 2;
}
.spreadsheet thead th.row-handle { background: var(--header-bg); }
.spreadsheet thead .col-letter {
  display: block;
  font-family: "Consolas", monospace;
  font-size: 11px; color: var(--muted);
}
.spreadsheet tbody th.row-handle {
  background: var(--header-bg);
  color: var(--header-text);
  font-family: "Consolas", monospace;
  font-weight: 700;
  font-size: 12px;
  text-align: center;
  padding: 0 8px;
  border: 1px solid var(--cell-border);
  border-left: none;
  position: sticky; left: 0;
  width: 44px;
  z-index: 1;
}
.spreadsheet tbody td {
  border: 1px solid var(--cell-border);
  padding: 0;
  background: var(--cell-bg);
  position: relative;
  height: 28px;
  cursor: cell;
}
.spreadsheet tbody tr:nth-child(even) td { background: var(--row-stripe); }
.spreadsheet tbody td.formula { background: var(--cell-formula); }
.spreadsheet tbody td.ai-suggest { background: var(--cell-ai); }
.spreadsheet tbody td.selected {
  background: var(--cell-selected) !important;
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  z-index: 3;
}
.spreadsheet tbody td.in-range {
  background: var(--cell-selected) !important;
}
.spreadsheet tbody td .cell-display {
  display: block;
  padding: 4px 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-variant-numeric: tabular-nums;
}
.spreadsheet tbody td .cell-display.right { text-align: right; }
.spreadsheet tbody td .cell-display.center { text-align: center; }
.spreadsheet tbody td input.cell-editor {
  width: 100%;
  height: 100%;
  padding: 4px 8px;
  border: 0;
  outline: 0;
  background: var(--cell-bg);
  color: var(--cell-text);
  font-family: inherit;
  font-size: 13px;
}
.spreadsheet tbody td.error .cell-display { color: var(--danger); }

/* ── Template picker ─────────────────────────────────────────── */
.template-picker {
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.template-card {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, transform .15s;
}
.template-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.template-card h4 { margin: 0 0 6px 0; font-size: 15px; color: var(--text); }
.template-card p { margin: 0; font-size: 12px; color: var(--muted); }
.template-card .icon { font-size: 28px; margin-bottom: 8px; }

/* ── Summary panel (right side) ──────────────────────────────── */
.summary-panel {
  position: sticky; bottom: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  color: var(--text);
  font-size: 13px;
}
.summary-panel .stat .label {
  display: block;
  font-size: 11px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 1px;
}
.summary-panel .stat .value {
  display: block;
  font-size: 18px; font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.summary-panel .stat.total .value { color: var(--success); }

/* ── Empty state ─────────────────────────────────────────────── */
.empty-state {
  flex: 1 1 auto;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}
.empty-state h3 { color: var(--text); margin: 0 0 8px 0; }
.empty-state p { max-width: 480px; line-height: 1.6; }
.empty-state .actions { margin-top: 20px; display: flex; gap: 8px; }

/* ── Free Scanner modal (อ่านแบบ PDF) ────────────────────────── */
.scan-overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(2, 6, 23, 0.72);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
.scan-modal {
  width: min(760px, 100%);
  max-height: 88vh;
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}
.scan-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.scan-head h2 { margin: 0; font-size: 18px; color: var(--text); }
.scan-sub { margin: 4px 0 0; font-size: 12px; color: var(--muted); max-width: 560px; line-height: 1.5; }
.scan-x {
  flex: none; width: 30px; height: 30px;
  background: var(--surface-2); color: var(--muted);
  border: 1px solid var(--border); border-radius: 6px;
  cursor: pointer; font-size: 14px;
}
.scan-x:hover { color: var(--text); border-color: var(--danger); }

.scan-body { padding: 20px; overflow-y: auto; }

/* upload */
.scan-drop {
  border: 2px dashed var(--surface-2);
  border-radius: 10px;
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.scan-drop:hover, .scan-drop.over { border-color: var(--accent); background: rgba(59, 130, 246, 0.06); }
.scan-drop-icon { font-size: 40px; }
.scan-drop-title { margin-top: 10px; font-size: 15px; font-weight: 700; color: var(--text); }
.scan-drop-hint { margin-top: 6px; font-size: 12px; color: var(--muted); line-height: 1.5; }
.scan-opt {
  display: flex; align-items: flex-start; gap: 8px;
  margin-top: 16px; font-size: 12.5px; color: var(--text); line-height: 1.5; cursor: pointer;
}
.scan-opt input { margin-top: 2px; }
.scan-note {
  margin-top: 12px; padding: 8px 12px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 6px; font-size: 12px; color: #6ee7b7;
}

/* progress */
.scan-progress { text-align: center; }
.scan-file { font-size: 14px; color: var(--text); margin-bottom: 14px; word-break: break-all; }
.scan-bar { height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; }
.scan-bar-fill { height: 100%; background: var(--accent); transition: width .2s; }
.scan-prog-msg { margin-top: 10px; font-size: 13px; color: var(--muted); }
.scan-progress .spinner { margin: 12px auto 0; }

.scan-error { padding: 12px 14px; background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); border-radius: 8px; color: #fca5a5; font-size: 13px; margin-bottom: 14px; }

/* review */
.scan-review { display: flex; flex-direction: column; gap: 12px; }
.scan-summary { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 12px; color: var(--muted); }
.scan-warn { padding: 8px 12px; background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3); border-radius: 6px; color: #fcd34d; font-size: 12.5px; }
.scan-ocr {
  display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap;
  padding: 8px 12px; background: var(--surface-2); border-radius: 6px; font-size: 12.5px; color: var(--text);
}
.scan-empty { padding: 20px; text-align: center; color: var(--muted); font-size: 13px; }

.scan-group { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.scan-group-head {
  padding: 8px 12px; font-size: 12px; font-weight: 700;
  color: var(--text); background: var(--surface-2);
  text-transform: uppercase; letter-spacing: .5px;
}
.scan-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; font-size: 13px; color: var(--text);
  border-top: 1px solid var(--border); cursor: pointer;
}
.scan-item:first-of-type { border-top: none; }
.scan-item:hover { background: rgba(148, 163, 184, 0.06); }
.scan-item.on { background: rgba(59, 130, 246, 0.08); }
.scan-item input { flex: none; }
.scan-item-label { flex: none; min-width: 130px; color: var(--muted); }
.scan-item-value { flex: 1 1 auto; font-weight: 600; word-break: break-word; }
.scan-item-ev {
  flex: none; max-width: 220px; font-size: 11px; color: #64748b; font-style: italic;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.conf-badge {
  flex: none; padding: 1px 7px; border-radius: 4px;
  font-size: 10px; font-weight: 700; color: #0f172a;
}

.scan-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 20px; border-top: 1px solid var(--border); background: var(--surface);
}
.scan-foot-count { font-size: 12px; color: var(--muted); }
.scan-foot-btns { display: flex; gap: 8px; }

@media (max-width: 600px) {
  .scan-item { flex-wrap: wrap; }
  .scan-item-ev { max-width: 100%; }
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: 52px auto 1fr;
    grid-template-areas: "header" "sidebar" "content";
  }
  .sidebar {
    max-height: 200px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}