@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/limonte-sweetalert2/11.1.0/sweetalert2.min.css');
@import url("https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.1/font/bootstrap-icons.css");

:root {
    --bg-main: #0b0f19;
    --bg-card: #111827;
    --bg-card-header: #161f33;
    --bg-input: #0f172a;
    --border-color: #1e293b;
    --border-highlight: #334155;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --accent-primary: #06b6d4;
    --accent-secondary: #6366f1;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
    min-height: 100vh;
    padding-bottom: 85px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Chế độ tối ưu hóa cho máy yếu (Lite Mode) */
body.lite-mode *,
body.lite-mode *::before,
body.lite-mode *::after {
    transition: none !important;
    animation: none !important;
    box-shadow: none !important;
}

.container {
    max-width: 1240px;
}

/* Navbar hiện đại, gọn nhẹ */
.navbar-cyber {
    background: #0f172a;
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 0;
}

.navbar-brand-cyber {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: 0.5px;
    color: #fff !important;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-badge {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 800;
}

.navbar-cyber .nav-link {
    color: #cbd5e1 !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 8px;
    margin: 2px;
}

.navbar-cyber .nav-link:hover,
.navbar-cyber .nav-link.active {
    color: #fff !important;
    background-color: rgba(6, 182, 212, 0.14);
}

/* Card chuẩn Cyber-Clean */
.card {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 14px !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
    overflow: hidden;
}

.card-header {
    background: var(--bg-card-header) !important;
    border-bottom: 1px solid var(--border-color) !important;
    color: var(--text-main) !important;
    font-weight: 700;
    padding: 0.9rem 1.25rem;
}

.card-body {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
    padding: 1.25rem;
}

/* Stat Cards trên Dashboard */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.15rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

/* Form Controls */
.form-control,
.form-select {
    background-color: var(--bg-input) !important;
    border: 1px solid var(--border-highlight) !important;
    color: var(--text-main) !important;
    border-radius: 10px !important;
    padding: 0.58rem 0.85rem;
    font-size: 0.93rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent-primary) !important;
    box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2) !important;
    background-color: #0b1324 !important;
    color: #fff !important;
}

.form-control::placeholder {
    color: #64748b !important;
}

.form-label {
    color: #cbd5e1;
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 0.35rem;
}

.input-group-text {
    background-color: #161f33 !important;
    border: 1px solid var(--border-highlight) !important;
    color: #cbd5e1 !important;
    border-radius: 10px;
}

/* Nút bấm hiện đại */
.btn {
    border-radius: 9px;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
}

.btn-sm {
    padding: 0.32rem 0.68rem;
    font-size: 0.82rem;
    border-radius: 7px;
}

.btn-cyber,
.btn-danger {
    background: linear-gradient(135deg, #06b6d4, #3b82f6) !important;
    border: none !important;
    color: #fff !important;
}

.btn-cyber:hover,
.btn-danger:hover {
    opacity: 0.92;
    color: #fff !important;
}

.btn-danger-real {
    background: #ef4444 !important;
    border: none !important;
    color: #fff !important;
}

.btn-danger-real:hover {
    background: #dc2626 !important;
    color: #fff !important;
}

/* Bảng dữ liệu */
.table {
    color: var(--text-main) !important;
    border-color: var(--border-color) !important;
    vertical-align: middle;
    margin-bottom: 0;
}

.table thead th {
    background-color: #161f33 !important;
    color: #94a3b8 !important;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-highlight) !important;
    padding: 0.75rem 0.6rem;
    white-space: nowrap;
}

.table tbody td {
    border-color: var(--border-color) !important;
    padding: 0.65rem 0.6rem;
    font-size: 0.9rem;
}

.table-hover tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.03) !important;
    color: #fff !important;
}

.table-responsive {
    -webkit-overflow-scrolling: touch;
}

/* List Group */
.list-group-item {
    background-color: var(--bg-input) !important;
    border-color: var(--border-color) !important;
    color: var(--text-main) !important;
}

/* Modal */
.modal-content {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-highlight) !important;
    color: var(--text-main) !important;
    border-radius: 16px !important;
}

.modal-header,
.modal-footer {
    border-color: var(--border-color) !important;
    background-color: var(--bg-card-header) !important;
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Dropdown */
.dropdown-menu {
    background-color: #161f33 !important;
    border: 1px solid var(--border-highlight) !important;
    border-radius: 12px !important;
    padding: 0.5rem;
}

.dropdown-item {
    color: #e2e8f0 !important;
    border-radius: 8px;
    padding: 0.48rem 0.85rem;
    font-size: 0.9rem;
}

.dropdown-item:hover {
    background-color: rgba(6, 182, 212, 0.16) !important;
    color: #fff !important;
}

.key-sensi {
    filter: blur(4px);
    user-select: none;
}

/* DataTables Dark Override */
.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter,
.dataTables_wrapper .dataTables_info,
.dataTables_wrapper .dataTables_paginate {
    color: var(--text-muted) !important;
    font-size: 0.88rem;
    margin-bottom: 0.6rem;
}

.page-item.disabled .page-link {
    background-color: #0f172a !important;
    border-color: var(--border-color) !important;
    color: #475569 !important;
}

.page-item .page-link {
    background-color: #161f33 !important;
    border-color: var(--border-color) !important;
    color: #cbd5e1 !important;
}

.page-item.active .page-link {
    background-color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
    color: #fff !important;
}

/* Responsive trên điện thoại nhỏ */
@media (max-width: 767.98px) {
    .container {
        padding-left: 10px !important;
        padding-right: 10px !important;
    }
    .card-body {
        padding: 0.95rem;
    }
    .stat-card {
        padding: 0.9rem;
    }
    .btn {
        font-size: 0.85rem;
    }
}

/* === Bản vá tương phản giao diện KeyCheater (v4.0) === */
:root {
    color-scheme: dark;
    --kc-text-main: #f1f5f9;
    --kc-text-muted: #cbd5e1;
    --bs-body-bg: #0b0f19;
    --bs-body-color: #f1f5f9;
    --bs-card-bg: #111827;
    --bs-card-color: #f1f5f9;
    --bs-secondary-color: #cbd5e1;
}

body {
    background-color: #0b0f19 !important;
    color: #f1f5f9 !important;
}

.card, .modal-content, .nata-card {
    background-color: #111827 !important;
    border: 1px solid #1e293b !important;
    color: #f1f5f9 !important;
    border-radius: 14px !important;
}

.card-header, .modal-header, .modal-footer, .nata-card-header {
    background-color: #161f33 !important;
    border-color: #1e293b !important;
    color: #f8fafc !important;
}

.card-body, .modal-body, .nata-card-body {
    background-color: #111827 !important;
    color: #f1f5f9 !important;
}

.nata-navbar {
    background: #0f172a !important;
    border-bottom: 1px solid #1e293b !important;
    color: #f8fafc !important;
}

.nata-card-header {
    padding: 0.95rem 1.25rem;
    border-bottom: 1px solid #1e293b !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nata-card-title {
    color: #f8fafc !important;
    font-weight: 700;
}

.nata-card-body {
    padding: 1.25rem;
}

.text-xs {
    font-size: 0.78rem !important;
}

.text-muted, .form-text, small.text-muted, .text-secondary, .nata-card .text-xs {
    color: #cbd5e1 !important;
}

.text-light, .text-white {
    color: #f8fafc !important;
}

.badge-soft-emerald {
    background: rgba(16, 185, 129, 0.16) !important;
    color: #34d399 !important;
    border: 1px solid rgba(16, 185, 129, 0.35) !important;
}

.badge-soft-indigo {
    background: rgba(99, 102, 241, 0.18) !important;
    color: #a5b4fc !important;
    border: 1px solid rgba(99, 102, 241, 0.38) !important;
}

.btn-xs {
    padding: 0.2rem 0.45rem !important;
    font-size: 0.75rem !important;
    border-radius: 6px !important;
}

.btn-outline-cyber {
    color: #38bdf8 !important;
    border: 1px solid rgba(56, 189, 248, 0.5) !important;
    background: rgba(15, 23, 42, 0.7) !important;
}
.btn-outline-cyber:hover {
    background: rgba(6, 182, 212, 0.18) !important;
    border-color: #38bdf8 !important;
    color: #fff !important;
}

.btn-outline-light {
    color: #f8fafc !important;
    border-color: #475569 !important;
    background-color: rgba(30, 41, 59, 0.75) !important;
}
.btn-outline-light:hover {
    background-color: #334155 !important;
    border-color: #64748b !important;
    color: #ffffff !important;
}

.btn-outline-info {
    color: #38bdf8 !important;
    border-color: #0284c7 !important;
}
.btn-outline-info:hover {
    background-color: #0284c7 !important;
    color: #ffffff !important;
}

.btn-outline-warning {
    color: #fbbf24 !important;
    border-color: #d97706 !important;
}
.btn-outline-warning:hover {
    background-color: #d97706 !important;
    color: #0f172a !important;
}

.form-control, .form-select, textarea, input[type="text"], input[type="password"], input[type="number"], input[type="url"], input[type="email"], input[type="search"] {
    background-color: #0f172a !important;
    color: #f8fafc !important;
    border: 1px solid #475569 !important;
}
.form-control:focus, .form-select:focus {
    background-color: #111c30 !important;
    color: #ffffff !important;
    border-color: #38bdf8 !important;
    box-shadow: 0 0 0 .2rem rgba(56, 189, 248, .18) !important;
}
.form-control::placeholder {
    color: #94a3b8 !important;
    opacity: 1 !important;
}
.form-select option {
    background-color: #0f172a;
    color: #f8fafc;
}

.table {
    --bs-table-color: #f1f5f9 !important;
    --bs-table-bg: #111827 !important;
    --bs-table-border-color: #1e293b !important;
    --bs-table-striped-color: #f1f5f9 !important;
    --bs-table-striped-bg: #0f172a !important;
    --bs-table-hover-color: #ffffff !important;
    --bs-table-hover-bg: #1e293b !important;
    background-color: #111827 !important;
    color: #f1f5f9 !important;
}
.table > :not(caption) > * > * {
    background-color: transparent !important;
    color: #f1f5f9 !important;
    border-bottom-color: #1e293b !important;
}
.table thead th {
    color: #e2e8f0 !important;
    background-color: #161f33 !important;
    border-bottom: 1px solid #334155 !important;
}
.table-hover > tbody > tr:hover > * {
    background-color: rgba(30, 41, 59, 0.75) !important;
    color: #ffffff !important;
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    background-color: #0f172a !important;
    color: #f8fafc !important;
    border: 1px solid #475569 !important;
    border-radius: 8px !important;
    padding: 4px 8px;
}
.dataTables_wrapper .dataTables_processing {
    background: #161f33 !important;
    color: #f8fafc !important;
    border: 1px solid #38bdf8 !important;
}
.badge { text-shadow: none; }
a { text-underline-offset: 3px; }