:root {
    --color-primary-900: #0b1f3a;
    --color-primary-800: #132b4f;
    --color-primary-700: #1e4a7a;
    --color-primary-600: #2d6aa3;
    --color-primary-100: #dceaf7;
    --color-primary-50: #eef5fb;
    --color-white: #fff;
    --color-background: #f5f7fa;
    --color-border: #e1e7ef;
    --color-text: #1f2937;
    --color-muted: #6f7d8e;
    --color-success: #1f8f5f;
    --color-success-soft: #e7f6ef;
    --color-warning: #c98a16;
    --color-warning-soft: #fff6df;
    --color-danger: #b42318;
    --color-danger-soft: #fef0ef;
    --color-info: #2563a6;
    --color-info-soft: #eaf3fc;
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --topbar-height: 72px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(11, 31, 58, .08);
    --shadow-md: 0 8px 24px rgba(11, 31, 58, .1);
    --shadow-lg: 0 20px 46px rgba(11, 31, 58, .14);
    --transition-fast: 160ms ease;
    --transition-normal: 240ms ease;
    --systemnet-primary: var(--color-primary-600);
    --systemnet-dark: var(--color-primary-900);
    --systemnet-surface: var(--color-background);
    --bs-primary: var(--color-primary-700);
    --bs-primary-rgb: 30, 74, 122;
    --bs-secondary: var(--color-muted);
    --bs-success: var(--color-success);
    --bs-success-rgb: 31, 143, 95;
    --bs-warning: var(--color-warning);
    --bs-danger: var(--color-danger);
    --bs-danger-rgb: 180, 35, 24;
    --bs-info: var(--color-info);
    --bs-body-color: var(--color-text);
    --bs-body-bg: var(--color-background);
    --bs-border-color: var(--color-border);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { min-height: 100%; }
html { background: var(--color-background); }
body {
    margin: 0;
    color: var(--color-text);
    background: var(--color-background);
    font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
a { text-underline-offset: 3px; }
img { max-width: 100%; }
:focus-visible {
    outline: 3px solid rgba(45, 106, 163, .5);
    outline-offset: 3px;
}
::selection { color: var(--color-white); background: var(--color-primary-700); }

.text-primary { --bs-text-opacity: 1; color: var(--color-primary-700) !important; }
.text-secondary { color: var(--color-muted) !important; }
.bg-body-tertiary { background: var(--color-background) !important; }
.border, .border-top, .border-bottom, .border-start, .border-end { border-color: var(--color-border) !important; }

h1, h2, h3, h4, h5, h6 { color: var(--color-primary-900); letter-spacing: -.018em; }
.h1, h1 { font-weight: 750; }
.h2, h2 { font-weight: 730; }

.btn {
    --bs-btn-border-radius: var(--radius-md);
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .25rem;
    font-weight: 650;
    transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--color-primary-800);
    --bs-btn-border-color: var(--color-primary-800);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--color-primary-700);
    --bs-btn-hover-border-color: var(--color-primary-700);
    --bs-btn-active-bg: var(--color-primary-900);
    --bs-btn-active-border-color: var(--color-primary-900);
    --bs-btn-focus-shadow-rgb: 45, 106, 163;
    box-shadow: 0 5px 14px rgba(11, 31, 58, .12);
}
.btn-outline-primary {
    --bs-btn-color: var(--color-primary-800);
    --bs-btn-border-color: var(--color-primary-700);
    --bs-btn-hover-bg: var(--color-primary-700);
    --bs-btn-hover-border-color: var(--color-primary-700);
}
.btn-secondary, .btn-outline-secondary { --bs-btn-border-radius: var(--radius-md); }
.btn-success { --bs-btn-bg: var(--color-success); --bs-btn-border-color: var(--color-success); }
.btn-warning { --bs-btn-bg: var(--color-warning); --bs-btn-border-color: var(--color-warning); }
.btn-danger { --bs-btn-bg: var(--color-danger); --bs-btn-border-color: var(--color-danger); }
.btn-outline-danger { --bs-btn-color: var(--color-danger); --bs-btn-border-color: var(--color-danger); }
.btn-light { color: var(--color-primary-900); border-color: var(--color-border); background: var(--color-white); }
.btn-sm { min-height: 34px; }
.btn-lg { min-height: 48px; }

.card {
    --bs-card-border-color: var(--color-border);
    --bs-card-border-radius: var(--radius-lg);
    color: var(--color-text);
    background: var(--color-white);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}
.card-header, .card-footer { border-color: var(--color-border); background: var(--color-white); }
.card-header:first-child { border-radius: calc(var(--radius-lg) - 1px) calc(var(--radius-lg) - 1px) 0 0; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow, .shadow-lg { box-shadow: var(--shadow-md) !important; }

.form-label { margin-bottom: .45rem; color: var(--color-primary-900); font-size: .875rem; font-weight: 650; }
.form-control, .form-select {
    min-height: 42px;
    color: var(--color-text);
    background-color: var(--color-white);
    border-color: #cdd6e2;
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}
textarea.form-control { min-height: auto; }
.form-control:hover, .form-select:hover { border-color: #9eafc1; }
.form-control:focus, .form-select:focus, .form-check-input:focus {
    border-color: var(--color-primary-600);
    box-shadow: 0 0 0 .22rem rgba(45, 106, 163, .15);
}
.form-check-input:checked { background-color: var(--color-primary-700); border-color: var(--color-primary-700); }
.form-control:disabled, .form-select:disabled { background-color: #edf1f5; }
.input-group-text { color: var(--color-muted); background: var(--color-primary-50); border-color: #cdd6e2; }
.invalid-feedback { color: var(--color-danger); }
.was-validated .form-control:invalid, .form-control.is-invalid, .was-validated .form-select:invalid, .form-select.is-invalid { border-color: var(--color-danger); }

.table-responsive {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}
.table { --bs-table-bg: transparent; --bs-table-color: var(--color-text); --bs-table-border-color: var(--color-border); margin-bottom: 0; }
.table > :not(caption) > * > * { padding: .82rem .9rem; vertical-align: middle; }
.table thead th {
    color: var(--color-primary-900);
    background: var(--color-primary-50);
    border-bottom-width: 1px;
    font-size: .77rem;
    font-weight: 750;
    letter-spacing: .025em;
    text-transform: uppercase;
    white-space: nowrap;
}
.table tbody tr { transition: background-color var(--transition-fast); }
.table-hover > tbody > tr:hover > * { --bs-table-bg-state: var(--color-primary-50); }
.table-striped > tbody > tr:nth-of-type(odd) > * { --bs-table-bg-type: rgba(238, 245, 251, .42); }

.alert { border-width: 1px; border-radius: var(--radius-md); }
.alert-primary, .alert-info { color: #174b7b; background: var(--color-info-soft); border-color: #bdd8ef; }
.alert-success { color: #176a47; background: var(--color-success-soft); border-color: #bce2d1; }
.alert-warning { color: #825b13; background: var(--color-warning-soft); border-color: #edd49c; }
.alert-danger { color: #8d2019; background: var(--color-danger-soft); border-color: #f0c3bf; }

.badge { padding: .42em .68em; border-radius: 999px; font-weight: 700; }
.text-bg-primary { background-color: var(--color-primary-700) !important; }
.text-bg-success { background-color: var(--color-success) !important; }
.text-bg-warning { color: #3e2b08 !important; background-color: #e4aa3e !important; }
.text-bg-danger { background-color: var(--color-danger) !important; }
.text-bg-info { color: #fff !important; background-color: var(--color-info) !important; }

.pagination { --bs-pagination-color: var(--color-primary-700); --bs-pagination-hover-color: var(--color-primary-900); --bs-pagination-hover-bg: var(--color-primary-100); --bs-pagination-focus-box-shadow: 0 0 0 .2rem rgba(45,106,163,.15); --bs-pagination-active-bg: var(--color-primary-800); --bs-pagination-active-border-color: var(--color-primary-800); gap: .28rem; }
.page-link { min-width: 38px; min-height: 38px; display: grid; place-items: center; border-radius: var(--radius-sm) !important; }

.nav-tabs { border-color: var(--color-border); gap: .25rem; }
.nav-tabs .nav-link { color: var(--color-muted); border-radius: var(--radius-md) var(--radius-md) 0 0; font-weight: 650; }
.nav-tabs .nav-link:hover { color: var(--color-primary-700); border-color: transparent; background: var(--color-primary-50); }
.nav-tabs .nav-link.active { color: var(--color-primary-800); border-color: var(--color-border) var(--color-border) var(--color-white); background: var(--color-white); }

.dropdown-menu { --bs-dropdown-border-color: var(--color-border); --bs-dropdown-border-radius: var(--radius-md); --bs-dropdown-link-hover-bg: var(--color-primary-50); padding: .45rem; box-shadow: var(--shadow-md); }
.dropdown-item { min-height: 38px; display: flex; align-items: center; border-radius: var(--radius-sm); }

.modal { z-index: 1110; }
.modal-backdrop { z-index: 1100; }
.modal-content { border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.modal-header, .modal-footer { border-color: var(--color-border); }
.modal-title { color: var(--color-primary-900); font-weight: 730; }

.accordion { --bs-accordion-border-color: var(--color-border); --bs-accordion-btn-focus-box-shadow: 0 0 0 .2rem rgba(45,106,163,.15); --bs-accordion-active-color: var(--color-primary-800); --bs-accordion-active-bg: var(--color-primary-50); }
.list-group { --bs-list-group-border-color: var(--color-border); }
.progress { height: .72rem; background: var(--color-primary-100); }
.progress-bar { background-color: var(--color-primary-600); }

.page-heading, .dashboard-header, .monitoring-header, .users-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}
.page-heading h1, .dashboard-header h1, .monitoring-header h1, .users-header h1 { color: var(--color-primary-900); }

.status-card { border: 1px solid var(--color-border); background: rgba(255,255,255,.92); backdrop-filter: blur(8px); }
.status-icon, .module-icon {
    display: inline-grid;
    width: 3rem;
    height: 3rem;
    place-items: center;
    color: var(--color-primary-700);
    background: var(--color-primary-100);
    border-radius: var(--radius-md);
    font-size: 1.35rem;
}
.module-card { transition: transform var(--transition-fast), box-shadow var(--transition-fast); }
.module-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md) !important; }
.live-dot, .monitoring-live-dot { box-shadow: 0 0 0 5px rgba(31, 143, 95, .12); }

.auth-section {
    min-height: calc(100vh - 138px);
    display: grid;
    place-items: center;
    background: radial-gradient(circle at 15% 12%, rgba(45, 106, 163, .16), transparent 26rem), radial-gradient(circle at 90% 85%, rgba(11, 31, 58, .08), transparent 28rem), var(--color-background);
}
.auth-section .card { overflow: hidden; border: 1px solid var(--color-border) !important; box-shadow: var(--shadow-lg) !important; }
.auth-section .card::before { display: block; height: 5px; content: ""; background: linear-gradient(90deg, var(--color-primary-900), var(--color-primary-600)); }
.auth-icon { display: inline-grid; width: 4rem; height: 4rem; place-items: center; color: #fff; background: var(--color-primary-800); border-radius: var(--radius-lg); font-size: 1.75rem; box-shadow: 0 10px 22px rgba(11,31,58,.2); }
.debug-message { max-width: 50rem; overflow-wrap: anywhere; }

.hero { background: radial-gradient(circle at 85% 20%, rgba(45,106,163,.14), transparent 30rem), linear-gradient(180deg, #fff, var(--color-background)); }

@media (max-width: 767.98px) {
    .page-heading, .dashboard-header, .monitoring-header, .users-header { align-items: stretch; flex-direction: column; }
    .page-heading .btn, .dashboard-header .btn, .monitoring-header .btn, .users-header .btn { align-self: flex-start; }
    .table > :not(caption) > * > * { padding: .72rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}