/* ============================================================
   Clean Bid — Style System
   ============================================================ */

:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --bg-input: #1a1a25;
  --border: #2a2a3a;
  --border-focus: #4f6ef7;
  --text: #e8e8ed;
  --text-secondary: #8888a0;
  --text-muted: #55556a;
  --accent: #4f6ef7;
  --accent-light: #6b85ff;
  --accent-glow: rgba(79, 110, 247, 0.15);
  --green: #34d399;
  --green-bg: rgba(52, 211, 153, 0.1);
  --amber: #fbbf24;
  --amber-bg: rgba(251, 191, 36, 0.1);
  --red: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ============ HEADER ============ */
.header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}
.logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo-badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--accent-glow);
  color: var(--accent-light);
  border: 1px solid rgba(79, 110, 247, 0.3);
}
.header-tagline {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ============ STEPS BAR ============ */
.steps-bar {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.steps-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 0;
}
.step {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.35;
  transition: var(--transition);
  cursor: default;
}
.step.active { opacity: 1; }
.step.completed { opacity: 0.7; }
.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: var(--transition);
}
.step.active .step-num {
  background: var(--accent);
  color: white;
  box-shadow: 0 0 12px var(--accent-glow);
}
.step.completed .step-num {
  background: var(--green);
  color: var(--bg);
}
.step-label {
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}
.step-line {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 12px;
  min-width: 20px;
}

/* ============ MAIN PANELS ============ */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  min-height: calc(100vh - 200px);
}
.panel { display: none; }
.panel.active { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-content {
  max-width: 900px;
  margin: 0 auto;
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.panel-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.panel-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.header-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.panel-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ============ UPLOAD ZONE ============ */
.upload-panel { text-align: center; }

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 40px;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-card);
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.upload-zone.dragover {
  transform: scale(1.01);
}
.upload-icon {
  color: var(--text-muted);
  margin-bottom: 16px;
}
.upload-zone h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.upload-zone p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}
.upload-formats {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 16px;
}

/* Processing */
.processing-state {
  padding: 60px 40px;
  text-align: center;
}
.processing-state h3 { margin-bottom: 8px; }
.processing-state p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 20px; }

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  max-width: 400px;
  margin: 0 auto;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
}
.progress-text {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 8px;
}

.demo-divider {
  margin: 32px 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.demo-divider::before, .demo-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.demo-divider span {
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
}

.hidden { display: none !important; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: inherit;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover { color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

/* ============ PROJECT INFO BAR ============ */
.project-info-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.info-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.info-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}
.info-value {
  font-size: 0.95rem;
  font-weight: 600;
}

/* ============ FLOORS TABLE ============ */
.floors-table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}
.floors-table {
  width: 100%;
  border-collapse: collapse;
}
.floors-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.floors-table td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(42,42,58,0.5);
  font-size: 0.9rem;
}
.floors-table tbody tr:hover { background: var(--bg-card-hover); }
.floors-table tfoot td {
  background: var(--bg-elevated);
  border-bottom: none;
  padding: 14px 16px;
}
.floors-table input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 6px 10px;
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  width: 120px;
  transition: var(--transition);
}
.floors-table input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.source-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}
.source-badge.extracted {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid rgba(52,211,153,0.2);
}
.source-badge.estimated {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid rgba(251,191,36,0.2);
}
.source-badge.manual {
  background: rgba(79,110,247,0.1);
  color: var(--accent-light);
  border: 1px solid rgba(79,110,247,0.2);
}
.btn-delete-row {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition);
  font-size: 1.1rem;
}
.btn-delete-row:hover { color: var(--red); background: rgba(248,113,113,0.1); }

/* ============ CONFIG GRID ============ */
.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.config-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.config-card.full-width { grid-column: 1 / -1; }
.config-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.form-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-input {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  transition: var(--transition);
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

.rate-summary {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}
.rate-total {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--green);
}

/* Phase Selector */
.phase-selector {
  display: flex;
  gap: 10px;
}
.phase-option { cursor: pointer; flex: 1; }
.phase-option input { display: none; }
.phase-card {
  padding: 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition);
}
.phase-option input:checked + .phase-card {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.phase-name { font-weight: 600; font-size: 0.85rem; margin-bottom: 4px; }
.phase-rate { font-size: 0.75rem; color: var(--text-secondary); }

/* ============ ESTIMATE PREVIEW ============ */
.estimate-preview {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.estimate-doc {
  padding: 48px;
  max-width: 800px;
  margin: 0 auto;
  font-size: 0.9rem;
  line-height: 1.7;
}
.estimate-doc .est-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--border);
}
.estimate-doc .est-company {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.estimate-doc .est-title {
  font-size: 1.1rem;
  color: var(--accent-light);
  font-weight: 600;
  margin-top: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.estimate-doc .est-project {
  color: var(--text-secondary);
  margin-top: 4px;
}
.estimate-doc .est-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 8px;
}

.est-section {
  margin-bottom: 32px;
}
.est-section h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-light);
  margin-bottom: 12px;
  font-weight: 600;
}

.est-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 8px;
}
.est-table th {
  text-align: left;
  padding: 8px 12px;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.est-table th:last-child, .est-table td:last-child { text-align: right; }
.est-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(42,42,58,0.3);
}
.est-table tfoot td {
  font-weight: 700;
  border-top: 2px solid var(--border);
  border-bottom: none;
  padding-top: 12px;
}

.est-total-box {
  background: var(--accent-glow);
  border: 1px solid rgba(79,110,247,0.3);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
}
.est-total-label {
  font-size: 1rem;
  font-weight: 600;
}
.est-total-amount {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-light);
}
.est-total-persf {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 2px;
  text-align: right;
}

.est-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
}
.est-footer p { margin-bottom: 8px; }

/* ============ FOOTER ============ */
.footer {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
}
.footer-inner {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer-dot { margin: 0 8px; }
.footer strong { color: var(--text-secondary); font-weight: 600; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .config-grid { grid-template-columns: 1fr; }
  .form-grid.cols-3 { grid-template-columns: 1fr; }
  .steps-inner { gap: 0; }
  .step-label { display: none; }
  .estimate-doc { padding: 24px; }
  .header-tagline { display: none; }
  .header-actions { flex-direction: column; }
  .phase-selector { flex-direction: column; }
}