/* Modern SMS Design System */
:root {
    --primary: #4f46e5;
    --primary-light: #6366f1;
    --primary-dark: #3730a3;
    --success: #10b981;
    --success-light: #34d399;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --danger: #ef4444;
    --danger-light: #f87171;
    --info: #06b6d4;
    --info-light: #22d3ee;
    --light: #f8fafc;
    --light-gray: #f1f5f9;
    --dark: #1e293b;
    --dark-gray: #475569;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    --gradient-success: linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

/* Base */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Keep footer anchored to page bottom on short-content screens */
body > .container.mt-4 {
    flex: 1 0 auto;
}

.sms-footer {
    margin-top: auto !important;
}

/* Cards */
.card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    background: white;
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    padding: 1.75rem 2rem;
    position: relative;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
}

.card-body {
    padding: 2rem;
}

.card-title {
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.card-subtitle {
    color: #64748b;
    font-weight: 500;
}

.card.border-left-primary {
    border-left: 4px solid var(--primary);
}

.card.border-left-success {
    border-left: 4px solid var(--success);
}

.card.border-left-warning {
    border-left: 4px solid var(--warning);
}

.card.border-left-info {
    border-left: 4px solid var(--info);
}

/* Buttons */
.btn {
    border-radius: 12px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(79, 70, 229, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
    box-shadow: 0 4px 14px 0 rgba(245, 158, 11, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    box-shadow: 0 4px 14px 0 rgba(239, 68, 68, 0.3);
}

.btn-info {
    background: linear-gradient(135deg, var(--info) 0%, #0891b2 100%);
    box-shadow: 0 4px 14px 0 rgba(6, 182, 212, 0.3);
}

.btn-outline-primary {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Avatar */
.avatar-sm {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    font-weight: 600;
}

.avatar-lg {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 1rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 3rem;
}

.timeline-marker {
    position: absolute;
    left: 6px;
    top: 0.5rem;
    width: 20px;
    height: 20px;
    background: white;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    z-index: 1;
}

.timeline-item.active .timeline-marker {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.timeline-content {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

/* Tables */
.table {
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    background: white;
}

.table th {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border: none;
    font-weight: 700;
    padding: 1.25rem 1rem;
    color: var(--dark);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table td {
    padding: 1.25rem 1rem;
    border: none;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    vertical-align: middle;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table-hover tbody tr:hover {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(99, 102, 241, 0.03) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.1);
}

.table-striped tbody tr:nth-of-type(odd) {
    background: rgba(248, 250, 252, 0.5);
}

.table-responsive {
    border-radius: 12px;
    box-shadow: var(--shadow);
}

/* Shared operational UI patterns */
.sms-sticky-actions {
    position: sticky;
    bottom: 0;
    z-index: 20;
    background: #fff;
    border-top: 1px solid var(--border);
    padding: var(--space-3) var(--space-4);
}

.sms-inline-feedback {
    font-size: 0.8rem;
    color: var(--dark-gray);
    margin-top: var(--space-1);
}

.sms-segmented {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.sms-segmented .btn {
    border: 0;
    border-right: 1px solid var(--border);
    border-radius: 0 !important;
    background: #e9edf5;
    color: #1f2a44;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: 0.01em;
    text-align: center;
    padding: 0.52rem 0.32rem;
    min-height: 2.35rem;
}

.sms-segmented .btn:last-of-type {
    border-right: 0;
}

.sms-segmented .btn-check:checked + .btn {
    background: var(--primary);
    color: #fff;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-weight: 800;
    color: var(--primary) !important;
    font-size: 1.5rem;
    text-decoration: none;
}

.nav-link {
    font-weight: 600;
    color: var(--dark) !important;
    transition: all 0.3s ease;
    padding: 0.75rem 1rem !important;
    border-radius: 8px;
    margin: 0 0.25rem;
}

.nav-link:hover {
    color: var(--primary) !important;
    background: rgba(79, 70, 229, 0.1);
    transform: translateY(-1px);
}

.dropdown-menu {
    border: none;
    border-radius: 12px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    padding: 0.5rem;
}

.dropdown-item {
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    transform: translateX(4px);
}

/* Nested Dropdown Support */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -1px;
    border-radius: 12px;
}

.dropdown-submenu:hover .dropdown-menu {
    display: block;
}

/* Forms */
.form-control, .form-select {
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 0.875rem 1rem;
    transition: all 0.3s ease;
    background: white;
    font-size: 0.95rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.08);
    transform: translateY(-1px);
}

.form-control:hover, .form-select:hover {
    border-color: rgba(79, 70, 229, 0.3);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--dark);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-floating {
    position: relative;
}

.form-floating > .form-control {
    padding: 1rem 0.75rem 0.5rem;
}

.form-floating > label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: 1rem 0.75rem;
    pointer-events: none;
    border: 1px solid transparent;
    transform-origin: 0 0;
    transition: opacity 0.1s ease-in-out, transform 0.1s ease-in-out;
}

.input-group {
    border-radius: 12px;
    overflow: hidden;
}

.input-group-text {
    background: var(--light);
    border: 2px solid var(--border);
    color: var(--primary);
    font-weight: 500;
}

/* Badges */
.badge {
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%) !important;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%) !important;
}

.badge.bg-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%) !important;
}

.badge.bg-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%) !important;
}

.badge.bg-info {
    background: linear-gradient(135deg, var(--info) 0%, #0891b2 100%) !important;
}

.badge.bg-secondary {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%) !important;
}

/* Bootstrap 4 badge compatibility (legacy markup across pages) */
.badge.badge-primary { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%) !important; color: #fff !important; }
.badge.badge-success { background: linear-gradient(135deg, var(--success) 0%, #059669 100%) !important; color: #fff !important; }
.badge.badge-danger { background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%) !important; color: #fff !important; }
.badge.badge-info { background: linear-gradient(135deg, var(--info) 0%, #0891b2 100%) !important; color: #fff !important; }
.badge.badge-warning { background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%) !important; color: #1f2937 !important; }
.badge.badge-secondary { background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%) !important; color: #fff !important; }

.bg-primary { background-color: var(--primary) !important; }
.bg-success { background-color: var(--success) !important; }
.bg-warning { background-color: var(--warning) !important; }
.bg-danger { background-color: var(--danger) !important; }
.bg-info { background-color: var(--info) !important; }

/* Utilities */
.shadow-sm {
    box-shadow: var(--shadow) !important;
}

.shadow {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
}

.shadow-lg {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04) !important;
}

.border-0 {
    border: none !important;
}

.rounded {
    border-radius: 12px !important;
}

.rounded-lg {
    border-radius: 16px !important;
}

/* Alert Styles */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    font-weight: 500;
    box-shadow: var(--shadow);
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(5, 150, 105, 0.1) 100%);
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(220, 38, 38, 0.1) 100%);
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(217, 119, 6, 0.1) 100%);
    color: #92400e;
    border-left: 4px solid var(--warning);
}

.alert-info {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(8, 145, 178, 0.1) 100%);
    color: #155e75;
    border-left: 4px solid var(--info);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Smooth Animations */
* {
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

/* Focus States */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .container-fluid {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .card-header {
        padding: 1.5rem;
    }
    
    .timeline-item {
        padding-left: 2rem;
    }
    
    .timeline::before {
        left: 10px;
    }
    
    .timeline-marker {
        left: 1px;
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .table th,
    .table td {
        padding: 1rem 0.75rem;
        font-size: 0.9rem;
    }
    
    .form-control, .form-select {
        padding: 0.75rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --light: #0f172a;
        --dark: #f1f5f9;
        --border: #334155;
    }
    
    body {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        color: var(--dark);
    }
    
    .card {
        background: rgba(30, 41, 59, 0.8);
        backdrop-filter: blur(10px);
        border-color: var(--border);
    }
    
    .card-header {
        background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(51, 65, 85, 0.9) 100%);
    }
    
    .navbar {
        background: rgba(30, 41, 59, 0.95) !important;
    }
    
    .form-control, .form-select {
        background: rgba(30, 41, 59, 0.8);
        border-color: var(--border);
        color: var(--dark);
    }
    
    .table {
        background: rgba(30, 41, 59, 0.8);
    }
    
    .table th {
        background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(51, 65, 85, 0.9) 100%);
    }
}