/**
 * Zalo Order Bot - Modern SaaS Design System (CSS)
 * Responsive, Lightweight, Clean Theme for Desktop & Mobile
 * Strict SaaS standard: Slate background, white cards, professional typography, uniform SVG icons
 */

:root {
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-sidebar-hover: #1e293b;
    --bg-sidebar-active: #2563eb;
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --text-sidebar: #cbd5e1;
    --text-sidebar-muted: #64748b;
    
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-border: #bfdbfe;
    
    --success: #10b981;
    --success-light: #ecfdf5;
    --success-border: #a7f3d0;
    --success-text: #065f46;
    
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --warning-border: #fde68a;
    --warning-text: #92400e;
    
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --danger-border: #fecaca;
    --danger-text: #991b1b;
    
    --info: #0284c7;
    --info-light: #f0f9ff;
    --info-border: #bae6fd;
    --info-text: #075985;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --sidebar-width: 260px;
}

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

body {
    font-family: var(--font);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--primary-hover);
}

/* Modern SaaS Auth Page Styles */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
    background: radial-gradient(circle at 50% 30%, #f1f5f9 0%, #e2e8f0 100%);
}

.auth-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    padding: 36px 32px;
    width: 100%;
    max-width: 420px;
}

.auth-header {
    margin-bottom: 24px;
    text-align: center;
}

.auth-logo-box {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #ffffff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.auth-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

.auth-header p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--text-muted);
}

/* SVG icon helper */
.svg-icon {
    display: inline-block;
    width: 18px;
    height: 18px;
    stroke-width: 2;
    stroke: currentColor;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: middle;
    flex-shrink: 0;
}
.svg-icon-sm { width: 15px; height: 15px; }
.svg-icon-lg { width: 22px; height: 22px; }

/* Layout Shell */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    transition: transform 0.25s ease;
}

.sidebar-header {
    padding: 20px 18px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon-box {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.35);
}

.brand-text-title {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.2px;
    line-height: 1.2;
}

.brand-text-sub {
    font-size: 11px;
    color: var(--text-sidebar-muted);
    font-weight: 500;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--text-sidebar);
    font-size: 13.5px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
}

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

.nav-link.active {
    background-color: var(--bg-sidebar-active);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.4);
}

.nav-link.active .svg-icon {
    stroke: #ffffff;
}

.sidebar-footer {
    padding: 14px 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 11.5px;
    color: var(--text-sidebar-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Mobile Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(2px);
    z-index: 999;
}

/* Main Content Area */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
}

/* Top Header */
.top-header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.btn-mobile-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    cursor: pointer;
    color: var(--text-main);
}

.header-title-wrapper h2 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

.header-title-wrapper p {
    font-size: 12px;
    color: var(--text-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.bot-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    background: var(--success-light);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.bot-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--success);
    display: inline-block;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.user-profile-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-main);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background-color: #e2e8f0;
    color: #475569;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
}

/* Page Body */
.page-content {
    flex: 1;
    padding: 24px 28px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

.page-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-heading h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

.page-heading p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* SaaS Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    background-color: #ffffff;
}

.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-subtitle {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    background-color: #fafafa;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Stat Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-label {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
    margin-top: 4px;
}

.stat-sub {
    font-size: 12px;
    color: var(--text-subtle);
    margin-top: 4px;
}

.stat-icon-wrapper {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon-blue { background: var(--primary-light); color: var(--primary); }
.stat-icon-green { background: var(--success-light); color: var(--success); }
.stat-icon-amber { background: var(--warning-light); color: var(--warning); }
.stat-icon-indigo { background: #e0e7ff; color: #4338ca; }

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.saas-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 13.5px;
}

.saas-table th {
    background-color: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.saas-table td {
    padding: 13px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
}

.saas-table tbody tr {
    transition: background-color 0.12s ease;
}

.saas-table tbody tr:hover {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    font-size: 11.5px;
    font-weight: 600;
    line-height: 1.3;
}

.badge-primary { background: var(--primary-light); color: var(--primary); border: 1px solid var(--primary-border); }
.badge-success { background: var(--success-light); color: var(--success-text); border: 1px solid var(--success-border); }
.badge-warning { background: var(--warning-light); color: var(--warning-text); border: 1px solid var(--warning-border); }
.badge-danger { background: var(--danger-light); color: var(--danger-text); border: 1px solid var(--danger-border); }
.badge-secondary { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; }
.badge-info { background: var(--info-light); color: var(--info-text); border: 1px solid var(--info-border); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    font-size: 13.5px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 1px 2px rgba(37, 99, 235, 0.2);
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
}

.btn-secondary {
    background-color: #f1f5f9;
    color: #334155;
    border-color: #cbd5e1;
}
.btn-secondary:hover {
    background-color: #e2e8f0;
    color: #0f172a;
}

.btn-outline-primary {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary-border);
}
.btn-outline-primary:hover {
    background-color: var(--primary-light);
    color: var(--primary-hover);
}

.btn-danger {
    background-color: var(--danger);
    color: #ffffff;
}
.btn-danger:hover {
    background-color: #dc2626;
    color: #ffffff;
}

.btn-outline-danger {
    background-color: transparent;
    color: var(--danger);
    border-color: var(--danger-border);
}
.btn-outline-danger:hover {
    background-color: var(--danger-light);
    color: #b91c1c;
}

.btn-success {
    background-color: var(--success);
    color: #ffffff;
}
.btn-success:hover {
    background-color: #059669;
    color: #ffffff;
}

.btn-block {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    font-size: 13.5px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: #ffffff;
    color: var(--text-main);
    font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea.form-control {
    resize: vertical;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}
.form-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}
.password-wrapper input {
    padding-right: 40px;
}
.btn-toggle-pw {
    position: absolute;
    right: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn-toggle-pw:hover {
    color: var(--text-main);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.45;
}

.alert-success {
    background-color: var(--success-light);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.alert-danger {
    background-color: var(--danger-light);
    color: var(--danger-text);
    border: 1px solid var(--danger-border);
}

.alert-warning {
    background-color: var(--warning-light);
    color: var(--warning-text);
    border: 1px solid var(--warning-border);
}

.alert-info {
    background-color: var(--info-light);
    color: var(--info-text);
    border: 1px solid var(--info-border);
}

/* Modal System */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(3px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-box {
    background: #ffffff;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalPopIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-box-lg {
    max-width: 760px;
}

@keyframes modalPopIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
}
.modal-close:hover {
    color: var(--text-main);
    background-color: #f1f5f9;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    font-size: 13.5px;
    color: var(--text-main);
}

.modal-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border-color);
    background-color: #f8fafc;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

/* Code & Pre Box */
.code-box {
    background-color: #0f172a;
    color: #e2e8f0;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

code {
    background-color: #f1f5f9;
    color: #0f172a;
    padding: 2px 5px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 12px;
}

/* Sub-tabs Component */
.nav-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 8px;
    margin-bottom: 20px;
}

.tab-link {
    padding: 10px 16px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    transition: all 0.15s ease;
}

.tab-link:hover {
    color: var(--text-main);
}

.tab-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Empty States */
.empty-state {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
}
.empty-state-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    color: var(--text-subtle);
}
.empty-state-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
}
.empty-state-text {
    font-size: 13px;
    max-width: 400px;
    margin: 0 auto;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    .sidebar-overlay.mobile-open {
        display: block;
    }
    .main-wrapper {
        margin-left: 0;
    }
    .btn-mobile-toggle {
        display: inline-flex;
    }
    .page-content {
        padding: 16px;
    }
    .top-header {
        padding: 10px 16px;
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .page-header-row {
        flex-direction: column;
        align-items: flex-start;
    }
}