:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f0f2f5;
    --bg-sidebar: #111b21;
    --bg-topbar: #ffffff;
    --bg-card: #ffffff;
    --bg-input: #f0f2f5;
    --bg-hover: #f0f2f5;
    --bg-dropdown: #ffffff;
    --text-primary: #111b21;
    --text-secondary: #667781;
    --text-sidebar: #aebac1;
    --text-sidebar-active: #ffffff;
    --text-inverse: #ffffff;
    --border-color: #e9edef;
    --accent-color: #00a884;
    --accent-hover: #06cf9c;
    --accent-light: #d9fdd3;
    --danger-color: #ea0038;
    --warning-color: #ff9500;
    --info-color: #00a3d4;
    --shadow-sm: 0 1px 3px rgba(11,20,26,0.08);
    --shadow-md: 0 2px 8px rgba(11,20,26,0.12);
    --shadow-lg: 0 8px 24px rgba(11,20,26,0.16);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.2s ease;
    --sidebar-width: 280px;
    --topbar-height: 60px;
}

[data-theme="dark"] {
    --bg-primary: #111b21;
    --bg-secondary: #0b141a;
    --bg-sidebar: #0b141a;
    --bg-topbar: #1f2c33;
    --bg-card: #1f2c33;
    --bg-input: #2a3942;
    --bg-hover: #2a3942;
    --bg-dropdown: #1f2c33;
    --text-primary: #e9edef;
    --text-secondary: #8696a0;
    --text-sidebar: #8696a0;
    --text-sidebar-active: #e9edef;
    --text-inverse: #111b21;
    --border-color: #313d45;
    --accent-color: #00a884;
    --accent-hover: #06cf9c;
    --accent-light: #005c4b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Chakra Petch', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-sidebar-active);
}

.brand-icon {
    color: var(--accent-color);
    display: flex;
    align-items: center;
}

.brand-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-sidebar);
    font-size: 24px;
    cursor: pointer;
    display: none;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 12px 0;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-group-label {
    display: block;
    padding: 16px 24px 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-sidebar);
    opacity: 0.5;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 24px;
    color: var(--text-sidebar);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
    transition: var(--transition);
    border-left: 3px solid transparent;
    position: relative;
}

.nav-link:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-sidebar-active);
}

.nav-item.active .nav-link {
    background: rgba(255,255,255,0.08);
    color: var(--text-sidebar-active);
    border-left-color: var(--accent-color);
}

.nav-icon {
    font-size: 22px;
    width: 24px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.theme-switcher {
    margin-bottom: 12px;
}

.theme-btn {
    background: rgba(255,255,255,0.08);
    border: none;
    color: var(--text-sidebar);
    width: 100%;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 20px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn:hover {
    background: rgba(255,255,255,0.12);
}

[data-theme="dark"] {
    --bs-body-color: var(--text-primary);
    --bs-body-bg: var(--bg-primary);
    --bs-emphasis-color: var(--text-primary);
    --bs-secondary-color: var(--text-secondary);
    --bs-border-color: var(--border-color);
}

[data-theme="dark"] .text-dark {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .text-body {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .bg-light {
    background-color: var(--bg-input) !important;
}

[data-theme="dark"] .bg-white {
    background-color: var(--bg-card) !important;
}

[data-theme="dark"] .light-icon,
[data-theme="light"] .dark-icon {
    display: none;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-sidebar-active);
}

.user-org {
    display: block;
    font-size: 12px;
    color: var(--text-sidebar);
    opacity: 0.7;
}

.logout-form {
    margin: 0;
}

.logout-btn {
    background: none;
    border: none;
    color: var(--text-sidebar);
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

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

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

.topbar {
    height: var(--topbar-height);
    background: var(--bg-topbar);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.3s ease;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-area {
    padding: 24px;
    flex: 1;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 16px 20px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

.stat-card {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.whatsapp { background: #25D366; }
.stat-icon.conversations { background: var(--accent-color); }
.stat-icon.contacts { background: var(--info-color); }
.stat-icon.messages { background: #5b61b9; }

.stat-info h3 {
    font-size: 28px;
    font-weight: 700;
    margin: 0;
    line-height: 1.2;
}

.stat-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-control, .form-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-family: 'Chakra Petch', sans-serif;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    background: var(--bg-input);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0,168,132,0.15);
    color: var(--text-primary);
}

.btn {
    font-family: 'Chakra Petch', sans-serif;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
    color: var(--text-primary);
    margin: 0;
}

.table thead th {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    color: var(--text-secondary);
}

.table tbody {
    background: var(--bg-card);
}

.table td {
    padding: 12px 16px;
    vertical-align: middle;
    border-color: var(--border-color);
}

.table-hover tbody tr:hover {
    background: var(--bg-hover);
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 16px 20px;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 16px 20px;
}

.badge {
    font-family: 'Chakra Petch', sans-serif;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.status-dot.connected { background: #25D366; }
.status-dot.disconnected { background: #8696a0; }
.status-dot.connecting { background: var(--warning-color); }
.status-dot.expired { background: var(--danger-color); }

.alert {
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.alert-success {
    background: var(--accent-light);
    color: var(--accent-color);
}

.alert-danger {
    background: #fce4e4;
    color: var(--danger-color);
}

[data-theme="dark"] .alert-danger {
    background: rgba(234,0,56,0.15);
}

.pagination {
    gap: 4px;
}

.page-link {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm) !important;
    padding: 8px 14px;
    font-family: 'Chakra Petch', sans-serif;
    transition: var(--transition);
}

.page-link:hover {
    background: var(--bg-hover);
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.page-item.active .page-link {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state .mdi {
    font-size: 64px;
    color: var(--text-secondary);
    opacity: 0.4;
    margin-bottom: 16px;
}

.empty-state h4 {
    color: var(--text-secondary);
    font-weight: 500;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle, .mobile-menu-btn {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .content-area {
        padding: 16px;
    }

    .stat-card {
        padding: 16px;
    }

    .topbar {
        padding: 0 16px;
    }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

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

.animate-slide-in {
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.btn:active {
    transform: scale(0.97);
}

.dropdown-menu {
    background: var(--bg-dropdown);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    color: var(--text-primary);
    font-family: 'Chakra Petch', sans-serif;
}

.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--accent-color);
}

.nav-tabs {
    border-bottom-color: var(--border-color);
}

.nav-tabs .nav-link {
    color: var(--text-secondary);
    font-family: 'Chakra Petch', sans-serif;
    border: none;
    padding: 12px 20px;
    font-weight: 500;
    position: relative;
}

.nav-tabs .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 2px;
    background: transparent;
    border-radius: 1px;
    transition: var(--transition);
}

.nav-tabs .nav-link.active {
    color: var(--accent-color);
    background: transparent;
}

.nav-tabs .nav-link.active::after {
    background: var(--accent-color);
}

.nav-tabs .nav-link:hover {
    color: var(--accent-color);
    border-color: transparent;
    isolation: isolate;
}

.progress {
    background: var(--bg-input);
    border-radius: 10px;
    height: 8px;
}

.progress-bar {
    background: var(--accent-color);
    border-radius: 10px;
}

/* ---- Page Loader ---- */
#page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    backdrop-filter: blur(2px);
    transition: opacity 0.2s ease;
}

#page-loader.active {
    display: flex;
}

#page-loader .loader-spinner {
    font-size: 40px;
    color: var(--accent-hover);
    animation: loaderSpin 0.8s linear infinite;
}

@keyframes loaderSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}