/* ===== BASE ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', system-ui, sans-serif; -webkit-font-smoothing: antialiased; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

/* ===== SIDEBAR NAV ===== */
.sidebar { transition: width 0.3s ease; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 0.5rem;
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.nav-item:hover {
  background: rgba(59, 130, 246, 0.08);
  color: #e2e8f0;
}
.nav-item.active {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
}
.nav-item.active svg {
  color: #60a5fa;
}

/* ===== CARDS ===== */
.card {
  background: #0f172a;
  border: 1px solid rgba(51, 65, 85, 0.5);
  border-radius: 1rem;
  overflow: hidden;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(51, 65, 85, 0.3);
}
.card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: #f1f5f9;
}

.metric-card {
  background: #0f172a;
  border: 1px solid rgba(51, 65, 85, 0.5);
  border-radius: 1rem;
  padding: 1.25rem;
  transition: all 0.3s ease;
}
.metric-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -5px rgba(0, 0, 0, 0.3);
}

/* ===== BADGES ===== */
.badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-success { background: rgba(16, 185, 129, 0.1); color: #34d399; }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: #fbbf24; }
.badge-danger { background: rgba(239, 68, 68, 0.1); color: #f87171; }
.badge-primary { background: rgba(59, 130, 246, 0.1); color: #60a5fa; }

/* ===== TAB BUTTONS ===== */
.tab-btn {
  padding: 0.3rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 0.375rem;
  background: transparent;
  color: #64748b;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-btn:hover { color: #e2e8f0; }
.tab-btn.active {
  background: rgba(59, 130, 246, 0.1);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.3);
}

/* ===== STEPPER ===== */
.step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  min-width: 100px;
}
.step-circle {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: #1e293b;
  color: #64748b;
  border: 2px solid #334155;
  transition: all 0.3s;
}
.step-item.active .step-circle {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border-color: #3b82f6;
}
.step-item.completed .step-circle {
  background: #10b981;
  color: white;
  border-color: #10b981;
}
.step-label {
  font-size: 0.7rem;
  color: #475569;
  font-weight: 500;
  text-align: center;
}
.step-item.active .step-label { color: #e2e8f0; }
.step-line {
  flex: 1;
  height: 2px;
  background: #1e293b;
  min-width: 40px;
  margin-top: -1.5rem;
  transition: background 0.3s;
}
.step-line.active { background: linear-gradient(90deg, #3b82f6, #06b6d4); }

/* ===== PIPELINE ===== */
.pipeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  min-width: 100px;
  flex-shrink: 0;
}
.pipeline-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1e293b;
  color: #475569;
  border: 2px solid #334155;
  transition: all 0.3s;
}
.pipeline-node.completed .pipeline-icon {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border-color: #10b981;
}
.pipeline-node.active .pipeline-icon {
  background: rgba(59, 130, 246, 0.15);
  color: #3b82f6;
  border-color: #3b82f6;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}
.pipeline-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: #475569;
}
.pipeline-node.completed .pipeline-label { color: #10b981; }
.pipeline-node.active .pipeline-label { color: #e2e8f0; }
.pipeline-time {
  font-size: 0.6rem;
  color: #475569;
  font-family: monospace;
}
.pipeline-node.active .pipeline-time { color: #3b82f6; }
.pipeline-connector {
  flex: 1;
  height: 2px;
  background: #1e293b;
  min-width: 30px;
  margin-bottom: 2rem;
}
.pipeline-connector.completed { background: #10b981; }
.pipeline-connector.active {
  background: linear-gradient(90deg, #10b981, #3b82f6);
  animation: pipelinePulse 2s ease-in-out infinite;
}
@keyframes pipelinePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===== TOGGLE SWITCH ===== */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #334155;
  border-radius: 24px;
  transition: 0.3s;
}
.toggle-slider:before {
  content: '';
  position: absolute;
  height: 18px; width: 18px;
  left: 3px; bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
}
.toggle-switch input:checked + .toggle-slider { background: #3b82f6; }
.toggle-switch input:checked + .toggle-slider:before { transform: translateX(20px); }

/* ===== MODE TOGGLE ===== */
#btn-mode-toggle {
  transition: all 0.25s ease;
}
#btn-mode-toggle:hover {
  background: rgba(59, 130, 246, 0.08);
}

/* Process log affected rows */
#proc-affected-tbody tr:hover {
  background: rgba(59, 130, 246, 0.04);
}

/* Modal enter animation */
#process-detail-modal > div {
  animation: modalSlideIn 0.25s ease-out;
}
@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Data preview table */
#data-preview-table th,
#data-preview-table td {
  border-right: 1px solid rgba(51, 65, 85, 0.2);
}
#data-preview-table th:last-child,
#data-preview-table td:last-child {
  border-right: none;
}

/* ===== SLIDER ===== */
.slider-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: #1e293b;
  border-radius: 3px;
  outline: none;
  transition: all 0.2s;
}
.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #3b82f6;
  cursor: pointer;
  border: 3px solid #1e3a8a;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
  transition: all 0.2s;
}
.slider-input::-webkit-slider-thumb:hover {
  background: #60a5fa;
  transform: scale(1.15);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.6);
}
.slider-input::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #3b82f6;
  cursor: pointer;
  border: 3px solid #1e3a8a;
}

/* ===== LEADERBOARD TABLE ===== */
#leaderboard-body tr {
  border-bottom: 1px solid rgba(51, 65, 85, 0.3);
  transition: background 0.2s;
}
#leaderboard-body tr:hover { background: rgba(59, 130, 246, 0.04); }
#leaderboard-body tr.selected { background: rgba(59, 130, 246, 0.08); }

.sortable { cursor: pointer; user-select: none; }
.sortable:hover { color: #e2e8f0; }
.sort-arrow { font-size: 0.6rem; opacity: 0.5; }
.sortable.sort-asc .sort-arrow::after { content: ' ▲'; }
.sortable.sort-desc .sort-arrow::after { content: ' ▼'; }

/* ===== SPARKLINE ===== */
.sparkline-bar {
  display: inline-block;
  width: 3px;
  margin-right: 1px;
  border-radius: 1px 1px 0 0;
  vertical-align: bottom;
  background: #3b82f6;
  opacity: 0.7;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-section:not(.hidden) {
  animation: fadeIn 0.3s ease-out;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ===== GLOW EFFECTS ===== */
.glow-blue {
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.15), 0 0 60px rgba(59, 130, 246, 0.05);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .sidebar { width: 60px; }
  .sidebar .nav-item span,
  .sidebar .step-label,
  .sidebar p,
  .sidebar h1 { display: none; }
  .sidebar .nav-item { justify-content: center; padding: 0.75rem; }
  main { margin-left: 60px; }
}

/* ===== UPLOAD DRAG STATE ===== */
#upload-zone.drag-over {
  border-color: #3b82f6;
  background: rgba(59, 130, 246, 0.05);
}

/* ===== DISTRIBUTION MINI BAR ===== */
.mini-distribution {
  display: flex;
  align-items: flex-end;
  gap: 1px;
  height: 24px;
}

/* ===== TABLE CHECKBOX ===== */
input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid #475569;
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
}
input[type="checkbox"]:checked {
  background: #3b82f6;
  border-color: #3b82f6;
}
input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  color: white;
  font-size: 10px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ===== RADIO ===== */
input[type="radio"] {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid #475569;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
  flex-shrink: 0;
}
input[type="radio"]:checked {
  border-color: #3b82f6;
}
input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  background: #3b82f6;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ===== SELECT ===== */
select {
  color: #e2e8f0;
}
select option {
  background: #1e293b;
  color: #e2e8f0;
}

/* ===== PROCESS LOG CATEGORIES ===== */
.proc-category {
  border: 1px solid rgba(51, 65, 85, 0.3);
  border-radius: 0.75rem;
  overflow: hidden;
}
.proc-cat-header {
  transition: background 0.2s ease;
}
.proc-cat-header:hover {
  filter: brightness(1.15);
}
.proc-cat-arrow {
  transition: transform 0.25s ease;
}
.proc-cat-body {
  padding: 0.25rem 0.5rem 0.5rem;
  transition: max-height 0.3s ease;
}
.proc-item {
  transition: all 0.2s ease;
}
.proc-item:hover .proc-detail-btn svg {
  color: #60a5fa;
}
.proc-method-inline {
  transition: border-color 0.2s;
  color: #e2e8f0;
}
.proc-method-inline:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.3);
}
.proc-method-inline option {
  background: #1e293b;
  color: #e2e8f0;
}