/* Light Theme – clean, professional */
:root {
    --bg-primary: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --card-bg: #ffffff;
    --card-border: rgba(0,0,0,0.125);
    --table-header-bg: #f8f9fa;
    --table-row-hover: rgba(0,0,0,0.05);
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --link-color: #007bff;
    --link-hover: #0056b3;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', 'Roboto Slab', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.navbar {
    background-color: #343a40 !important;
    border-bottom: 1px solid #dee2e6;
}

.navbar-brand, .navbar-nav .nav-link {
    color: #ffffff !important;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid var(--card-border);
    font-weight: bold;
}

.table-responsive {
    overflow-x: auto;
    border-radius: 0.5rem;
}

.data-table {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    vertical-align: middle;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.data-table td.email-col,
.data-table td.telegram-col {
    white-space: normal;
    word-break: break-word;
}

.data-table th {
    background-color: var(--table-header-bg);
    border-bottom: 1px solid var(--card-border);
}

.data-table tbody tr:hover {
    background-color: var(--table-row-hover);
}

.action-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.action-buttons .btn {
    margin: 0;
    white-space: nowrap;
}

.form-control, .form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}
.btn-primary:hover {
    background-color: #0069d9;
    border-color: #0062cc;
}
.btn-danger {
    background-color: #dc3545;
    border-color: #dc3545;
}
.btn-warning {
    background-color: #ffc107;
    border-color: #ffc107;
    color: #212529;
}

.badge {
    font-weight: normal;
    padding: 0.35em 0.65em;
}

/* Footer – centered */
footer {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid #dee2e6;
    text-align: center;
    color: var(--text-secondary);
}

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