:root {
    --color-bg: #f4f5f7;
    --color-surface: #ffffff;
    --color-border: #e2e5ea;
    --color-text: #1c2230;
    --color-muted: #6b7280;
    --color-primary: #1665d8;
    --color-primary-hover: #1152ae;
    --color-primary-soft: #eaf1fd;
    --color-danger: #d1364a;
    --color-danger-hover: #a8283a;
    --color-danger-soft: #fdeceb;
    --color-success: #1ea672;
    --color-success-soft: #e4f6ec;
    --color-warning: #c98a12;
    --color-warning-soft: #fcf1dc;
    --color-topbar-bg: #17191d;
    --color-topbar-text: #f4f5f7;
    --sidebar-width: 224px;
    --topbar-height: 56px;
    --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.06);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-primary);
}

/* Top bar */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--topbar-height);
    padding: 0 1.25rem;
    background: var(--color-topbar-bg);
    color: var(--color-topbar-text);
    position: sticky;
    top: 0;
    z-index: 20;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--color-topbar-text);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
}

.brand-name {
    font-size: 0.95rem;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #3a3d44;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
}

.topbar-username {
    font-size: 0.85rem;
    color: #d5d7dc;
}

.navbar-logout-form {
    margin: 0;
}

.link-button {
    background: none;
    border: none;
    padding: 0;
    color: #d5d7dc;
    cursor: pointer;
    font: inherit;
    font-size: 0.85rem;
    text-decoration: underline;
}

.link-button:hover {
    color: #fff;
}

/* App shell / sidebar */

.app-shell {
    display: flex;
    align-items: flex-start;
    min-height: calc(100vh - var(--topbar-height));
}

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    min-height: calc(100vh - var(--topbar-height));
    position: sticky;
    top: var(--topbar-height);
    padding: 0.75rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.55rem 0.7rem;
    border-radius: 6px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9rem;
}

.sidebar-link .icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--color-muted);
}

.sidebar-link:hover {
    background: var(--color-bg);
}

.sidebar-link.active {
    background: var(--color-primary-soft);
    color: var(--color-primary);
    font-weight: 600;
}

.sidebar-link.active .icon {
    color: var(--color-primary);
}

/* Page content */

.page-container {
    flex: 1;
    min-width: 0;
    max-width: 1120px;
    margin: 0 auto;
    padding: 1.75rem 2rem 3rem;
}

h1 {
    margin: 0 0 1.25rem;
    font-size: 1.4rem;
}

h2 {
    font-size: 1.05rem;
    margin-top: 0;
}

.page-subtitle {
    color: var(--color-muted);
    margin-top: -0.75rem;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
}

.form-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    max-width: 480px;
}

.form-card-wide {
    max-width: none;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.3rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.filter-form input:focus,
.filter-form select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.form-group input:disabled {
    background: var(--color-bg);
    color: var(--color-muted);
}

.filter-form {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin-bottom: 1.1rem;
    flex-wrap: wrap;
}

.filter-form input,
.filter-form select {
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font: inherit;
    background: var(--color-surface);
}

.filter-form input[type="text"] {
    min-width: 240px;
}

.filter-form .btn-primary {
    margin-left: auto;
}

.action-row {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-border);
}

.action-row form {
    margin: 0;
}

button,
.btn-primary,
.btn-secondary,
.btn-danger {
    cursor: pointer;
    font: inherit;
    border-radius: 6px;
    border: 1px solid transparent;
    padding: 0.55rem 1.1rem;
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.2;
    transition: background-color 0.12s ease, border-color 0.12s ease;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg);
}

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

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

table a {
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
}

table a:hover {
    text-decoration: underline;
}

table a + a {
    margin-left: 0.9rem;
}

/* Card-wrapped table, 3CX-style */

.table-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.table-card table {
    border: none;
    box-shadow: none;
    border-radius: 0;
    margin-bottom: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1.25rem;
    font-size: 0.88rem;
}

th, td {
    text-align: left;
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: var(--color-bg);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-muted);
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody tr:hover {
    background: #fafbfc;
}

.table-meta {
    color: var(--color-muted);
    font-size: 0.85rem;
}

.section-title {
    margin-top: 2rem;
    margin-bottom: 0.9rem;
    font-size: 1.1rem;
}

.pagination {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.pagination a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    height: 2rem;
    padding: 0 0.4rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.85rem;
    color: var(--color-text);
}

.pagination a.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.pagination a:hover:not(.active) {
    background: var(--color-bg);
}

/* Status badges */

.status {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    background: var(--color-muted);
}

.status-dot.status-active { background: var(--color-success); }
.status-dot.status-pending { background: var(--color-warning); }
.status-dot.status-inactive { background: var(--color-danger); }

.badge {
    display: inline-block;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: var(--color-success-soft); color: var(--color-success); }
.badge-warning { background: var(--color-warning-soft); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-soft); color: var(--color-danger); }
.badge-neutral { background: var(--color-bg); color: var(--color-muted); }

.banner-success {
    background: var(--color-success-soft);
    border: 1px solid var(--color-success);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
}

.banner-error {
    background: var(--color-danger-soft);
    border: 1px solid var(--color-danger);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
}

code {
    background: var(--color-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

.auth-page {
    display: flex;
    justify-content: center;
    padding-top: 3rem;
}

.auth-card {
    width: 100%;
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.auth-submit {
    width: 100%;
    margin-top: 0.25rem;
}

@media (max-width: 860px) {
    .app-shell {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-height: auto;
        position: static;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    .sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .page-container {
        padding: 1.25rem 1rem 2rem;
    }
}

/* Confirmation modal */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(16, 24, 40, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 100;
}

.modal-overlay[hidden] {
    display: none;
}

.modal-box {
    background: var(--color-surface);
    border-radius: 10px;
    box-shadow: 0 12px 32px rgba(16, 24, 40, 0.22);
    padding: 1.5rem;
    max-width: 400px;
    width: 100%;
}

.modal-message {
    margin: 0 0 1.25rem;
    font-size: 0.95rem;
    color: var(--color-text);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}