/* ── Admin Site Styles ─────────────────────────────────────────────────────── */

:root {
    --admin-sidebar-width: 240px;
    --admin-sidebar-bg: #1e293b;
    --admin-sidebar-text: #cbd5e1;
    --admin-sidebar-active: #3b82f6;
    --admin-sidebar-hover: #334155;
    --admin-bg: #f1f5f9;
    --admin-card: #ffffff;
    --admin-border: #e2e8f0;
    --admin-text: #1e293b;
    --admin-text-muted: #64748b;
    --admin-primary: #3b82f6;
    --admin-danger: #ef4444;
    --admin-success: #22c55e;
    --admin-warning: #f59e0b;
}

/* ── Layout ──────────────────────────────────────────────────────────────────── */

.admin-shell {
    display: flex;
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--admin-bg);
}

/* ── Sidebar ─────────────────────────────────────────────────────────────────── */

.admin-sidebar {
    width: var(--admin-sidebar-width);
    background: var(--admin-sidebar-bg);
    color: var(--admin-sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    overflow-y: auto;
}

.admin-logo {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid #334155;
}

.admin-logo-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0;
    line-height: 1.2;
}

.admin-logo-sub {
    font-size: 0.7rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.admin-nav {
    flex: 1;
    padding: 1rem 0;
}

.admin-nav-section {
    padding: 0.25rem 1rem 0.5rem;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #475569;
    margin-top: 0.75rem;
}

.admin-nav a {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 1.5rem;
    color: var(--admin-sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background 0.15s, color 0.15s;
    border-left: 3px solid transparent;
}

.admin-nav a:hover {
    background: var(--admin-sidebar-hover);
    color: #ffffff;
}

.admin-nav a.active {
    background: var(--admin-sidebar-hover);
    color: #ffffff;
    border-left-color: var(--admin-sidebar-active);
}

.admin-nav-icon {
    width: 1rem;
    text-align: center;
    font-style: normal;
    flex-shrink: 0;
}

.admin-user-panel {
    padding: 1rem 1.5rem;
    border-top: 1px solid #334155;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-user-avatar {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--admin-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
}

.admin-user-name {
    font-size: 0.8rem;
    color: #ffffff;
    font-weight: 500;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-logout-btn {
    background: none;
    border: none;
    color: #64748b;
    cursor: pointer;
    padding: 0.25rem;
    font-size: 0.85rem;
    transition: color 0.15s;
}

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

/* ── Main Content ─────────────────────────────────────────────────────────────── */

.admin-main {
    margin-left: var(--admin-sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-topbar {
    background: white;
    border-bottom: 1px solid var(--admin-border);
    padding: 0.875rem 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.admin-page-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--admin-text);
    margin: 0;
}

.admin-content {
    padding: 1.75rem;
    flex: 1;
}

/* ── Cards ───────────────────────────────────────────────────────────────────── */

.admin-card {
    background: var(--admin-card);
    border: 1px solid var(--admin-border);
    border-radius: 0.5rem;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.admin-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.admin-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--admin-text);
    margin: 0;
}

/* ── Stat Cards ──────────────────────────────────────────────────────────────── */

.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.admin-stat-card {
    background: white;
    border: 1px solid var(--admin-border);
    border-radius: 0.5rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.admin-stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--admin-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.admin-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--admin-text);
    line-height: 1;
}

.admin-stat-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

/* ── Tables ──────────────────────────────────────────────────────────────────── */

.admin-table-wrap {
    background: white;
    border: 1px solid var(--admin-border);
    border-radius: 0.5rem;
    overflow: hidden;
}

.admin-table-toolbar {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.admin-table-search {
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--admin-border);
    border-radius: 0.375rem;
    font-size: 0.85rem;
    outline: none;
    width: 220px;
    transition: border-color 0.15s;
}

.admin-table-search:focus { border-color: var(--admin-primary); }

table.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.admin-table thead th {
    background: #f8fafc;
    padding: 0.65rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--admin-text-muted);
    border-bottom: 1px solid var(--admin-border);
    white-space: nowrap;
}

.admin-table tbody tr {
    border-bottom: 1px solid #f1f5f9;
    transition: background 0.1s;
}

.admin-table tbody tr:hover { background: #f8fafc; }
.admin-table tbody tr:last-child { border-bottom: none; }

.admin-table tbody td {
    padding: 0.75rem 1rem;
    color: var(--admin-text);
    vertical-align: middle;
}

.admin-table-actions {
    display: flex;
    gap: 0.4rem;
    justify-content: flex-end;
}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */

.btn-admin {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary { background: var(--admin-primary); color: white; }
.btn-primary:hover { background: #2563eb; }

.btn-secondary { background: #f1f5f9; color: var(--admin-text); border: 1px solid var(--admin-border); }
.btn-secondary:hover { background: #e2e8f0; }

.btn-danger { background: #fee2e2; color: var(--admin-danger); }
.btn-danger:hover { background: var(--admin-danger); color: white; }

.btn-success { background: #dcfce7; color: #16a34a; }
.btn-success:hover { background: var(--admin-success); color: white; }

.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; }

.btn-admin:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Badges / Status ─────────────────────────────────────────────────────────── */

.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-green { background: #dcfce7; color: #16a34a; }
.badge-red { background: #fee2e2; color: #dc2626; }
.badge-blue { background: #dbeafe; color: #2563eb; }
.badge-yellow { background: #fef9c3; color: #a16207; }
.badge-gray { background: #f1f5f9; color: #64748b; }
.badge-purple { background: #f3e8ff; color: #7c3aed; }

/* ── Modal ───────────────────────────────────────────────────────────────────── */

.admin-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.admin-modal {
    background: white;
    border-radius: 0.75rem;
    width: 100%;
    max-width: 640px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.admin-modal-lg { max-width: 860px; }

.admin-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--admin-border);
}

.admin-modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--admin-text);
    margin: 0;
}

.admin-modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--admin-text-muted);
    line-height: 1;
    padding: 0.25rem;
}

.admin-modal-body { padding: 1.5rem; }

.admin-modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--admin-border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ── Forms ───────────────────────────────────────────────────────────────────── */

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

.form-grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

.form-col-span-2 { grid-column: span 2; }
.form-col-span-3 { grid-column: span 3; }

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--admin-text);
    display: block;
}

.form-control {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--admin-border);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.15s;
    width: 100%;
    box-sizing: border-box;
    background: white;
    color: var(--admin-text);
}

.form-control:focus { border-color: var(--admin-primary); box-shadow: 0 0 0 2px rgba(59,130,246,0.15); }

textarea.form-control { resize: vertical; min-height: 80px; }

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
}

/* ── Alert / toast ───────────────────────────────────────────────────────────── */

.admin-alert {
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.admin-alert-error { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }
.admin-alert-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.admin-alert-info { background: #dbeafe; color: #1d4ed8; border: 1px solid #bfdbfe; }

/* ── Empty state ─────────────────────────────────────────────────────────────── */

.admin-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--admin-text-muted);
}

.admin-empty-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.admin-empty-title { font-size: 1rem; font-weight: 600; color: var(--admin-text); margin: 0 0 0.25rem; }
.admin-empty-sub { font-size: 0.85rem; }

/* ── Loading ─────────────────────────────────────────────────────────────────── */

.admin-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    font-size: 0.9rem;
    color: var(--admin-text-muted);
    gap: 0.5rem;
}

/* ── Login page ──────────────────────────────────────────────────────────────── */

.login-shell {
    min-height: 100vh;
    background: var(--admin-sidebar-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-card {
    background: white;
    border-radius: 0.75rem;
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-logo {
    text-align: center;
    margin-bottom: 1.75rem;
}

.login-logo-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--admin-text);
    margin: 0.5rem 0 0.25rem;
}

.login-logo-sub {
    font-size: 0.8rem;
    color: var(--admin-text-muted);
}

/* ── Chat page ───────────────────────────────────────────────────────────────── */

.chat-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 0;
    border: 1px solid var(--admin-border);
    border-radius: 0.5rem;
    background: white;
    overflow: hidden;
    height: calc(100vh - 140px);
}

.chat-sessions-panel {
    border-right: 1px solid var(--admin-border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.chat-sessions-header {
    padding: 0.875rem 1rem;
    font-weight: 600;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--admin-border);
    background: #f8fafc;
}

.chat-session-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #f1f5f9;
    cursor: pointer;
    transition: background 0.1s;
}

.chat-session-item:hover { background: #f8fafc; }
.chat-session-item.selected { background: #eff6ff; border-left: 3px solid var(--admin-primary); }

.chat-session-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--admin-text);
}

.chat-session-meta {
    font-size: 0.75rem;
    color: var(--admin-text-muted);
    margin-top: 0.15rem;
}

.chat-messages-panel {
    display: flex;
    flex-direction: column;
}

.chat-messages-header {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--admin-border);
    background: #f8fafc;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-messages-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 70%;
}

.chat-message.from-agent { align-self: flex-end; align-items: flex-end; }
.chat-message.from-visitor { align-self: flex-start; }

.chat-bubble {
    padding: 0.5rem 0.875rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    line-height: 1.4;
}

.from-agent .chat-bubble { background: var(--admin-primary); color: white; border-radius: 1rem 1rem 0.25rem 1rem; }
.from-visitor .chat-bubble { background: #f1f5f9; color: var(--admin-text); border-radius: 1rem 1rem 1rem 0.25rem; }

.chat-message-time {
    font-size: 0.7rem;
    color: var(--admin-text-muted);
    margin-top: 0.2rem;
}

.chat-compose {
    padding: 0.875rem 1rem;
    border-top: 1px solid var(--admin-border);
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.chat-compose textarea {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--admin-border);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    resize: none;
    outline: none;
    max-height: 100px;
    min-height: 38px;
}

.chat-compose textarea:focus { border-color: var(--admin-primary); }

/* ── Responsive ──────────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .admin-sidebar { transform: translateX(-100%); }
    .admin-main { margin-left: 0; }
    .form-grid, .form-grid-3 { grid-template-columns: 1fr; }
    .form-col-span-2, .form-col-span-3 { grid-column: span 1; }
    .chat-layout { grid-template-columns: 1fr; }
}