/* Premium Dark Mode Design System */
:root {
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --secondary: #f472b6;
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --dark-surface-hover: #334155;
    --text-main: #f1f5f9;
    --text-muted: #cbd5e1;
    --text-heading: #ffffff;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --info: #38bdf8;
    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(148, 163, 184, 0.15);
}

body {
    background-color: var(--dark-bg);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    background-image: radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.08), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.08), transparent 25%);
    background-attachment: fixed;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
}

/* Glassmorphism Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    color: var(--text-main);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}

.card-header {
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--glass-border);
    border-radius: 1rem 1rem 0 0 !important;
}

/* Sidebar Navigation */
.sidebar {
    background: var(--dark-surface);
    border-right: 1px solid var(--glass-border);
    min-height: 100vh;
    width: 260px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    padding-top: 1.5rem;
    transition: all 0.3s ease;
}

.main-content {
    margin-left: 260px;
    padding: 2rem;
    min-height: 100vh;
}

.nav-link {
    color: var(--text-muted);
    padding: 0.8rem 1.5rem;
    border-radius: 0.5rem;
    margin: 0.2rem 1rem;
    transition: all 0.2s ease;
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    color: #fff;
    background: rgba(99, 102, 241, 0.15);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    color: #fff;
}

.nav-link i {
    margin-right: 10px;
    font-size: 1.1rem;
}

/* Gradients and Text */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, #6366f1, #a855f7);
    border: none;
    border-radius: 0.5rem;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    color: #fff;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.5);
    color: #fff;
}

.btn-success {
    background: linear-gradient(135deg, #059669, #10b981);
    border: none;
    color: #fff;
    font-weight: 600;
}

.btn-success:hover {
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
    color: #fff;
}

.btn-info {
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    border: none;
    color: #fff;
    font-weight: 600;
}

.btn-outline-info {
    border-color: var(--info);
    color: var(--info);
}
.btn-outline-info:hover {
    background: var(--info);
    color: #000;
}

.btn-outline-success {
    border-color: var(--success);
    color: var(--success);
}
.btn-outline-success:hover {
    background: var(--success);
    color: #000;
}

.btn-outline-secondary {
    border-color: var(--text-muted);
    color: var(--text-muted);
}
.btn-outline-secondary:hover {
    background: var(--text-muted);
    color: var(--dark-bg);
}

.btn-outline-danger {
    border-color: var(--danger);
    color: var(--danger);
}
.btn-outline-danger:hover {
    background: var(--danger);
    color: #fff;
}

.btn-outline-light {
    border-color: var(--glass-border);
    color: var(--text-main);
}
.btn-outline-light:hover {
    background: rgba(255,255,255,0.05);
    color: #fff;
    border-color: var(--primary);
}

/* Tables */
.table {
    color: var(--text-main);
    --bs-table-bg: transparent;
    --bs-table-hover-bg: rgba(255, 255, 255, 0.04);
}

.table tbody tr {
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.04);
}

.table th {
    border-bottom: 2px solid rgba(148, 163, 184, 0.2);
    color: #e2e8f0;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.8px;
    padding: 1rem;
    background: transparent;
}

.table td {
    padding: 1rem;
    background: transparent;
    color: var(--text-main);
    vertical-align: middle;
}

/* Forms */
.form-control, .form-select {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.2);
    color: #fff;
    border-radius: 0.5rem;
    padding: 0.7rem 1rem;
}

.form-control:focus, .form-select:focus {
    background: rgba(15, 23, 42, 0.8);
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
    color: #fff;
}

.form-control::placeholder {
    color: #64748b;
}

.form-label {
    color: var(--text-muted);
    font-weight: 500;
}

.form-check-label {
    color: var(--text-main);
}

.form-check-input {
    background-color: rgba(15, 23, 42, 0.6);
    border-color: rgba(148, 163, 184, 0.3);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* Stats Cards */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-icon {
    position: absolute;
    right: -20px;
    bottom: -20px;
    font-size: 8rem;
    opacity: 0.06;
    transform: rotate(-15deg);
}

.stat-card h6 {
    color: var(--text-muted) !important;
}

.stat-card h2 {
    color: #fff !important;
}

/* Badges - More Vibrant */
.badge {
    padding: 0.45em 0.85em;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.78rem;
}

.badge.bg-secondary {
    background: rgba(99, 102, 241, 0.2) !important;
    color: #a5b4fc !important;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge.bg-success {
    background: rgba(16, 185, 129, 0.2) !important;
    color: #6ee7b7 !important;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge.bg-info {
    background: rgba(56, 189, 248, 0.2) !important;
    color: #7dd3fc !important;
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge.bg-primary {
    background: rgba(129, 140, 248, 0.2) !important;
    color: #c7d2fe !important;
    border: 1px solid rgba(129, 140, 248, 0.3);
}

.badge.bg-warning {
    background: rgba(251, 191, 36, 0.2) !important;
    color: #fde68a !important;
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.badge.bg-danger {
    background: rgba(248, 113, 113, 0.2) !important;
    color: #fca5a5 !important;
    border: 1px solid rgba(248, 113, 113, 0.3);
}

.badge-pending { background: rgba(251, 191, 36, 0.2) !important; color: #fde68a !important; border: 1px solid rgba(251, 191, 36, 0.3); }
.badge-generated { background: rgba(129, 140, 248, 0.2) !important; color: #c7d2fe !important; border: 1px solid rgba(129, 140, 248, 0.3); }
.badge-emailed { background: rgba(52, 211, 153, 0.2) !important; color: #6ee7b7 !important; border: 1px solid rgba(52, 211, 153, 0.3); }

/* Alerts */
.alert-success { background: rgba(16, 185, 129, 0.15); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.alert-danger { background: rgba(248, 113, 113, 0.15); color: #fca5a5; border: 1px solid rgba(248, 113, 113, 0.3); }
.alert-info { background: rgba(56, 189, 248, 0.15); color: #7dd3fc; border: 1px solid rgba(56, 189, 248, 0.3); }
.alert-warning { background: rgba(251, 191, 36, 0.15); color: #fde68a; border: 1px solid rgba(251, 191, 36, 0.3); }

/* List Groups */
.list-group-item {
    color: var(--text-main) !important;
    border-color: rgba(148, 163, 184, 0.1) !important;
}

/* Small / Muted Text */
.text-muted {
    color: var(--text-muted) !important;
}

small, .small {
    color: var(--text-muted);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.4s ease forwards;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .main-content { margin-left: 0; }
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

/* HR / Dividers */
hr {
    border-color: rgba(148, 163, 184, 0.15);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--dark-bg); 
}
::-webkit-scrollbar-thumb {
    background: var(--dark-surface-hover); 
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary); 
}