:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-input: #1f2937;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;

  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #8b5cf6;

  --glow-blue: rgba(59, 130, 246, 0.25);
  --glow-emerald: rgba(16, 185, 129, 0.2);
  --glow-purple: rgba(139, 92, 246, 0.2);

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.75);
  --glass-backdrop: blur(16px);
}

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

body {
  font-family: var(--font-body);
  background: radial-gradient(circle at 15% 15%, #131b2e 0%, var(--bg-primary) 100%);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

/* Background ambient light effects */
.ambient-glow {
  position: fixed;
  top: -150px;
  right: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -200px;
  left: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Container */
.app-container {
  max-width: 1540px;
  margin: 0 auto;
  padding: 24px 32px 60px;
  position: relative;
  z-index: 1;
}

/* Header & Navigation */
.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 28px;
  box-shadow: var(--shadow-card);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 20px var(--glow-blue);
}

.brand-info h1 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #93c5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-pill-online {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border-radius: 20px;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  font-size: 11px;
  font-weight: 500;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  outline: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: white;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.45);
}

.btn-emerald {
  background: linear-gradient(135deg, #059669, #047857);
  color: white;
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
}

.btn-emerald:hover {
  background: linear-gradient(135deg, #10b981, #059669);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  border-color: rgba(244, 63, 94, 0.3);
  color: #fb7185;
}

.btn-danger:hover {
  background: #f43f5e;
  color: white;
}

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

/* KPI Stat Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.18);
}

.stat-info .stat-label {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-info .stat-value {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
}

.stat-subtext {
  font-size: 11.5px;
  color: var(--text-dim);
  margin-top: 4px;
}

.stat-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.icon-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.icon-emerald { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.icon-amber { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.icon-purple { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }
.icon-cyan { background: rgba(6, 182, 212, 0.15); color: #22d3ee; }

/* Control Panel & Filters */
.controls-bar {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-card);
}

.search-box-wrapper {
  flex: 1;
  min-width: 280px;
  position: relative;
}

.search-box-wrapper input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px 10px 40px;
  color: var(--text-main);
  font-size: 13.5px;
  transition: all 0.2s;
}

.search-box-wrapper input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 15px;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.select-custom {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 9px 14px;
  font-size: 13px;
  cursor: pointer;
  outline: none;
}

.select-custom:focus {
  border-color: var(--border-focus);
}

/* Table Card */
.table-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.table-header-title {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.table-header-title h2 {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.enrollment-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.enrollment-table th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.enrollment-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.enrollment-table tbody tr {
  transition: background 0.15s ease;
}

.enrollment-table tbody tr:hover {
  background: var(--bg-card-hover);
}

/* Table Item Components */
.student-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  color: white;
  flex-shrink: 0;
}

.student-meta .student-name {
  font-weight: 600;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.student-meta .student-cms {
  font-size: 11.5px;
  color: var(--text-muted);
}

.badge-cms {
  display: inline-block;
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 11px;
  color: #cbd5e1;
}

.course-title {
  font-weight: 500;
  color: #e2e8f0;
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-sub {
  font-size: 11.5px;
  color: var(--text-dim);
}

.amount-box {
  font-weight: 700;
  color: #f1f5f9;
  font-size: 14px;
}

.channel-tag {
  display: inline-block;
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(59, 130, 246, 0.12);
  color: #93c5fd;
  margin-top: 2px;
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-verified {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-pending {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-rejected {
  background: rgba(244, 63, 94, 0.15);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.25);
}

.badge-synced {
  background: rgba(6, 182, 212, 0.15);
  color: #22d3ee;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.badge-unexported {
  background: rgba(156, 163, 175, 0.15);
  color: #9ca3af;
  border: 1px solid rgba(156, 163, 175, 0.25);
}

.attachment-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border-radius: 6px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  font-size: 11.5px;
  cursor: pointer;
  transition: all 0.15s;
}

.attachment-pill:hover {
  background: rgba(59, 130, 246, 0.2);
}

/* Modals & Drawers */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

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

.modal-container {
  background: #111827;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 980px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-modal);
  position: relative;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: #111827;
  z-index: 10;
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

.btn-close:hover {
  color: white;
}

.modal-body {
  padding: 24px;
}

.modal-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
}

@media (max-width: 860px) {
  .modal-grid {
    grid-template-columns: 1fr;
  }
}

/* Detail Section Cards */
.detail-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 18px;
}

.detail-card-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.meta-field {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 13px;
}

.meta-field:last-child {
  border-bottom: none;
}

.meta-key {
  color: var(--text-muted);
}

.meta-val {
  color: #f3f4f6;
  font-weight: 500;
  text-align: right;
  max-width: 60%;
  word-break: break-all;
}

/* Receipt Preview Box */
.receipt-preview-box {
  background: #000;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-align: center;
  position: relative;
}

.receipt-image {
  max-width: 100%;
  max-height: 480px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  cursor: zoom-in;
  transition: transform 0.2s;
}

.receipt-toolbar {
  padding: 10px 14px;
  background: rgba(17, 24, 39, 0.9);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  border-top: 1px solid var(--border-color);
}

/* Raw Email Text Viewer */
.raw-email-view {
  background: #090d16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 12px;
  color: #cbd5e1;
  white-space: pre-wrap;
  max-height: 200px;
  overflow-y: auto;
}

/* Form Controls */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: white;
  font-size: 13.5px;
  outline: none;
}

.form-control:focus {
  border-color: var(--border-focus);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #1f2937;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  color: white;
  font-size: 13.5px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.25s ease-out;
  min-width: 280px;
}

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

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

/* Spinners */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 14px;
  opacity: 0.6;
}