:root {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border-color: #334155;
  --success: #10b981;
  --whatsapp: #22c55e;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background-color: var(--bg-primary); color: var(--text-main); height: 100vh; }
.app-layout { display: flex; height: 100vh; }
.sidebar { width: 230px; background-color: var(--bg-card); border-right: 1px solid var(--border-color); padding: 1.5rem 1rem; display: flex; flex-direction: column; gap: 2rem; }
.brand h2 { font-size: 1.25rem; letter-spacing: -0.5px; }
.nav-links { display: flex; flex-direction: column; gap: 0.5rem; }
.nav-btn { background: none; border: none; color: var(--text-muted); text-align: left; padding: 0.75rem 1rem; border-radius: 6px; cursor: pointer; font-size: 0.95rem; }
.nav-btn:hover, .nav-btn.active { background-color: var(--bg-hover); color: var(--text-main); }
.content-area { flex: 1; padding: 2rem; overflow-y: auto; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; gap: 1rem; }
.header-controls { display: flex; gap: 0.75rem; align-items: center; }
.control-input { background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-main); padding: 0.6rem 0.8rem; border-radius: 6px; font-size: 0.9rem; outline: none; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
.stat-card { background: var(--bg-card); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border-color); }
.stat-card h3 { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.stat-card p { font-size: 1.75rem; font-weight: bold; }

.kanban-board { display: flex; gap: 1rem; overflow-x: auto; align-items: flex-start; min-height: 500px; }
.kanban-col { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 8px; width: 260px; min-width: 260px; padding: 1rem; }
.kanban-col h3 { font-size: 0.95rem; margin-bottom: 1rem; color: var(--text-muted); }
.cards-container { min-height: 350px; display: flex; flex-direction: column; gap: 0.75rem; }
.kanban-card { background-color: var(--bg-primary); border: 1px solid var(--border-color); padding: 0.85rem; border-radius: 6px; }
.kanban-card h4 { font-size: 0.95rem; margin-bottom: 0.25rem; }
.kanban-card p { font-size: 0.8rem; color: var(--text-muted); }
.kanban-card .price { color: var(--success); font-weight: bold; margin-top: 0.35rem; }
.kanban-card select { width: 100%; margin-top: 0.5rem; background: var(--bg-card); color: var(--text-main); border: 1px solid var(--border-color); padding: 0.4rem; border-radius: 4px; }
.card-actions { display: flex; gap: 0.4rem; margin-top: 0.5rem; }

.table-container { overflow-x: auto; background-color: var(--bg-card); border-radius: 8px; border: 1px solid var(--border-color); }
.data-table { width: 100%; border-collapse: collapse; text-align: left; }
.data-table th, .data-table td { padding: 1rem; border-bottom: 1px solid var(--border-color); }
.data-table th { color: var(--text-muted); font-size: 0.85rem; }

.gst-badge { display: inline-flex; flex-direction: column; font-size: 0.85rem; }
.gst-state { color: var(--accent); font-weight: 600; font-size: 0.75rem; margin-top: 2px; }

.btn { padding: 0.55rem 0.9rem; border-radius: 6px; border: none; cursor: pointer; font-size: 0.85rem; font-weight: 500; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 0.35rem; }
.btn-primary { background-color: var(--accent); color: #fff; }
.btn-primary:hover { background-color: var(--accent-hover); }
.btn-secondary { background-color: var(--bg-hover); color: var(--text-main); }
.btn-danger { background-color: #ef4444; color: #fff; }
.btn-whatsapp { background-color: var(--whatsapp); color: #fff; font-size: 0.8rem; padding: 0.35rem 0.65rem; }
.btn-email { background-color: #3b82f6; color: #fff; font-size: 0.8rem; padding: 0.35rem 0.65rem; }
.action-group { display: flex; gap: 0.4rem; }

.modal { margin: auto; padding: 2rem; border-radius: 8px; background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-main); max-width: 440px; width: 100%; }
.modal-lg { max-width: 680px; }
.modal::backdrop { background: rgba(0, 0, 0, 0.7); }
.modal form { display: flex; flex-direction: column; gap: 0.75rem; }
.modal input, .modal select { padding: 0.6rem; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 4px; color: var(--text-main); }
.modal-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1.25rem; }
.feedback-text { font-size: 0.8rem; min-height: 1.1rem; }

.quote-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.75rem; }
.quote-details { margin-bottom: 1rem; font-size: 0.9rem; line-height: 1.5; }
.quote-items-table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
.quote-items-table th, .quote-items-table td { padding: 0.5rem; border-bottom: 1px solid var(--border-color); }
.quote-items-table input { width: 100%; padding: 0.4rem; background: var(--bg-primary); border: 1px solid var(--border-color); color: var(--text-main); border-radius: 4px; }
.quote-summary { margin-top: 1.5rem; text-align: right; line-height: 1.8; }
.task-item { background: var(--bg-card); padding: 1rem; border-radius: 6px; margin-bottom: 0.5rem; border: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }