/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --bg-input: #1e2a4a;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --text-muted: #6b7280;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-glow: rgba(129, 140, 248, 0.3);
  --success: #4ade80;
  --danger: #f87171;
  --warning: #fbbf24;
  --border: #2a2a4a;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* === Layout === */
#app { min-height: 100vh; display: flex; flex-direction: column; }

#main-layout {
  display: flex;
  flex: 1;
  padding-top: 60px;
}

#main-layout.no-sidebar { display: block; }

#content {
  flex: 1;
  padding: 30px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

#main-layout:not(.no-sidebar) #content {
  margin-left: 240px;
}

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}

.navbar-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-brand svg { width: 24px; height: 24px; }

.navbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-user span { color: var(--text-secondary); font-size: 0.9rem; }

/* === Sidebar === */
.sidebar {
  position: fixed;
  top: 60px;
  left: 0;
  width: 240px;
  height: calc(100vh - 60px);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  overflow-y: auto;
  z-index: 90;
}

.sidebar-section { padding: 8px 20px; }
.sidebar-section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-radius: 0;
  transition: var(--transition);
  cursor: pointer;
}

.sidebar-link:hover, .sidebar-link.active {
  background: var(--bg-card);
  color: var(--accent);
}

.sidebar-link svg { width: 18px; height: 18px; flex-shrink: 0; }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 20px var(--accent-glow); }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { opacity: 0.9; }

.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* === Cards === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

/* === Stat Cards === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* === Forms === */
.form-group {
  margin-bottom: 20px;
  position: relative;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* === Tables === */
.table-wrapper { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tr:hover td { background: rgba(255,255,255,0.02); }

/* === Status Badges === */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-pending { background: rgba(251,191,36,0.15); color: var(--warning); }
.badge-processing { background: rgba(129,140,248,0.15); color: var(--accent); }
.badge-completed { background: rgba(74,222,128,0.15); color: var(--success); }
.badge-failed { background: rgba(248,113,113,0.15); color: var(--danger); }

/* === Toast === */
#toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px;
  color: var(--text-primary);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
  min-width: 280px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-info { border-left: 4px solid var(--accent); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 24px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* === Login === */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.login-card h1 {
  text-align: center;
  color: var(--accent);
  margin-bottom: 8px;
  font-size: 1.8rem;
}

.login-card p {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 30px;
  font-size: 0.9rem;
}

/* === Upload === */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(129,140,248,0.05);
}

.upload-zone svg {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.upload-zone h3 {
  color: var(--text-primary);
  margin-bottom: 8px;
}

.upload-zone p { color: var(--text-muted); font-size: 0.9rem; }

/* === Steps === */
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
}

.step.active .step-number {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.step.completed .step-number {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.step-line {
  width: 60px;
  height: 2px;
  background: var(--border);
  margin: 0 8px;
}

.step.active ~ .step-line, .step.completed + .step-line { background: var(--accent); }

/* === Progress Ring === */
.progress-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 30px 0;
}

.progress-ring-wrap { position: relative; }

.progress-ring { transform: rotate(-90deg); }

.progress-ring-bg { stroke: var(--border); fill: none; }

.progress-ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
}

.progress-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.progress-percent {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.progress-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* === Counters === */
.counters {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin: 20px 0;
}

.counter { text-align: center; }

.counter-value {
  font-size: 1.8rem;
  font-weight: 700;
}

.counter-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.counter-valid .counter-value { color: var(--success); }
.counter-invalid .counter-value { color: var(--danger); }
.counter-total .counter-value { color: var(--accent); }

/* === Column Selection === */
.column-options { display: flex; flex-direction: column; gap: 10px; }

.column-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}

.column-option:hover { border-color: var(--accent); }
.column-option.selected { border-color: var(--accent); background: rgba(129,140,248,0.1); }

.column-option input[type="radio"] { accent-color: var(--accent); }

/* === Page Header === */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-header h1 { font-size: 1.5rem; }

/* === Skeleton Loader === */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-input) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

.skeleton-text { height: 16px; margin-bottom: 8px; }
.skeleton-card { height: 120px; }

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === Confetti === */
@keyframes confetti-fall {
  0% { transform: translateY(-100vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti-piece {
  position: fixed;
  width: 10px;
  height: 10px;
  top: -10px;
  z-index: 9999;
  animation: confetti-fall 3s ease-in forwards;
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state h3 { margin-bottom: 8px; color: var(--text-secondary); }

/* === Responsive === */
@media (max-width: 768px) {
  .sidebar { display: none; }
  #main-layout:not(.no-sidebar) #content { margin-left: 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .counters { gap: 20px; }
}

/* === Utility === */
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-10 { gap: 10px; }
.hidden { display: none !important; }