:root {
    --primary-color: #2A3F54;
    --primary-color-darker: #1e2d3b;
    --accent-color: #007AFF;
    --accent-color-darker: #0056b3;
    --sidebar-bg: #2A3F54;
    --sidebar-text-color: #E7E7E7;
    --sidebar-link-hover-bg: #395068;
    --sidebar-link-active-bg: #2c7be5;
    --background-main: #F4F7F6;
    --background-card: #FFFFFF;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #E0E0E0;
    --border-radius-md: 10px;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --sidebar-width: 250px;

    --status-ok-color: #28a745;
    --status-ok-darker-color: #218838;
    --status-new-color: #ff9500;
    --danger-color: #dc3545;
    --danger-darker-color: #c82333;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-body); background: var(--background-main); color: var(--text-primary); line-height: 1.6; }
body.modal-open { overflow: hidden; }

/* --- Login Screen Layout --- */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}
.login-container {
    width: 100%;
    max-width: 420px;
    background: var(--background-card);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    box-shadow: 0 4px 25px rgba(0,0,0,0.1);
}
.login-container form { margin: 0; display: flex; flex-direction: column; }
.login-header { text-align: center; margin-bottom: 2rem; }
.login-header h1 { font-family: var(--font-heading); font-size: 1.5rem; color: var(--primary-color); display: flex; align-items: center; justify-content: center; gap: 12px; }
.login-header h2 { font-size: 1rem; color: var(--text-secondary); font-weight: 400; margin-top: 0.5rem; }

/* --- Dashboard Layout --- */
.dashboard-layout { display: flex; }
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text-color);
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease-in-out;
    z-index: 1100;
}
.sidebar-header { padding: 1.2rem 1.5rem; border-bottom: 1px solid #395068; }
.sidebar-title { font-family: var(--font-heading); font-size: 1.5rem; color: #fff; display: flex; align-items: center; gap: 12px; }
.sidebar-nav { flex-grow: 1; }
.sidebar-nav ul { list-style: none; padding-top: 1rem; }
.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    color: var(--sidebar-text-color);
    text-decoration: none;
    transition: background-color 0.2s;
    font-size: 1rem;
    gap: 1rem;
}
.sidebar-nav .nav-link:hover { background-color: var(--sidebar-link-hover-bg); }
.sidebar-nav .nav-link.active { background-color: var(--sidebar-link-active-bg); color: #fff; font-weight: bold; }
.sidebar-nav .nav-link .fa-fw { width: 20px; text-align: center; }
.sidebar-nav .nav-link.indented { padding-left: 3.5rem; }
.sidebar-footer { padding: 1rem 1.5rem; border-top: 1px solid #395068; display: flex; align-items: center; justify-content: space-between; }
.user-info a { color: var(--sidebar-text-color); text-decoration: none; opacity: 0.8; display: flex; align-items: center; gap: 10px; }
.user-info a:hover { opacity: 1; }
.logout-btn-sidebar { color: var(--sidebar-text-color); text-decoration: none; font-size: 1.2rem; opacity: 0.8; }
.logout-btn-sidebar:hover { opacity: 1; }
.main-content {
    flex-grow: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}
.main-header {
    margin-top: 0 !important;
    background: var(--background-card);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}
.page-title { font-family: var(--font-heading); font-size: 1.5rem; color: var(--text-primary); }
.mobile-menu-btn { display: none; font-size: 1.5rem; background: none; border: none; cursor: pointer; color: var(--text-primary); }
.page-content { padding: 2rem; }

/* --- General Content Styles --- */
.form-container { background: var(--background-card); padding: 2rem; border-radius: var(--border-radius-md); box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.form-container h3 { font-family: var(--font-heading); margin-bottom: 1.5rem; }
.controls-bar {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.controls-bar .filter-box { flex-grow: 1; margin-bottom: 0; }
.controls-bar .filter-box .form-group { margin-bottom: 0; }
.form-group { margin-bottom: 24px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 10px; font-size: 14px; }
.form-group input, .form-group textarea, .form-group select, .form-control-inline {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
button, input, select, textarea { font-family: inherit; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus, .form-control-inline:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(42, 63, 84, 0.15);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-group .form-control { width: 100%; }
.form-row-aligned {
    display: grid;
    grid-template-columns: 1fr 160px;
    gap: 10px;
    align-items: center;
}
.form-row-aligned .btn { width: 100%; }
.btn {
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 15px 25px;
    border-radius: var(--border-radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-decoration: none;
    transition: all 0.2s;
    width: 100%;
    line-height: 1.5;
    white-space: nowrap;
}
.btn:hover { background: var(--primary-color-darker); transform: translateY(-2px); box-shadow: 0 4px 8px rgba(42, 63, 84, 0.2); }
.btn-secondary { background: transparent; color: var(--primary-color); border: 2px solid var(--primary-color); }
.btn-secondary:hover { background: rgba(42, 63, 84, 0.05); }
.btn-accent { background: var(--accent-color); }
.btn-accent:hover { background: var(--accent-color-darker); }
.btn-danger { background-color: var(--danger-color); }
.btn-danger:hover { background-color: var(--danger-darker-color); }
.login-container form .btn { width: auto; align-self: center; padding-left: 40px; padding-right: 40px; }
.controls-bar .btn { padding-top: 14px; padding-bottom: 14px; height: 51px; width: auto; }
.item-list-grid { margin-top: 25px; display: grid; gap: 15px; }

/* --- UNIFIED CARD SYSTEM --- */
.info-card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-left-width: 5px;
    border-radius: var(--border-radius-md);
    padding: 15px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    transition: box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}
.info-card:hover { box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
.card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.card-title { font-weight: 600; font-family: var(--font-heading); font-size: 17px; flex: 1; margin-right: 10px; }
.card-body { flex-grow: 1; }
.card-footer { margin-top: 12px; border-top: 1px solid var(--border-color); padding-top: 12px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; }
.card-meta { font-size: 14px; color: var(--text-secondary); line-height: 1.4; }
.card-meta p { margin: 4px 0; font-size: 0.9rem; }
.status-badge { padding: 6px 14px; border-radius: 4px; font-size: 12px; font-weight: 600; white-space: nowrap; }

/* Specific Card Body Layouts */
.hub-card .card-body {
    display: grid;
    grid-template-areas: "top-left top-right" "bot-left bot-right";
    grid-template-columns: 1fr auto;
    gap: 8px 16px;
}
.server-card .card-body {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}
.grid-cell-top-left { grid-area: top-left; }
.grid-cell-top-right { grid-area: top-right; justify-self: end; }
.grid-cell-bottom-left { grid-area: bot-left; align-self: end; }
.grid-cell-bottom-right { grid-area: bot-right; align-self: end; }
.card-metrics { display: flex; flex-direction: row; gap: 0.75rem; }
.metric-item { display: flex; flex-direction: column; align-items: center; }
.metric-item label { font-size: 11px; color: var(--text-secondary); margin-top: 4px; white-space: nowrap; }
.password-field { cursor: pointer; user-select: none; }
.password-plain { font-family: monospace; background-color: #e9ecef; padding: 2px 6px; border-radius: 4px; }
.wifi-badge { padding: 3px 6px; border-radius: 4px; font-size: 11px; font-weight: 600; margin-top: 5px; }
.wifi-badge-off { background-color: #dc3545; color: #fff; }
.wifi-badge-sta { background-color: #007bff; color: #fff; }
.wifi-badge-ap { background-color: #1a7444; color: #fff; }

/* --- Modal Styles --- */
.modal { position: fixed; z-index: 1050; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 95%; max-width: 900px; visibility: hidden; opacity: 0; transition: all 0.2s; }
.modal.is-visible { visibility: visible; opacity: 1; }
.modal-content { position: relative; background-color: #fff; border: 1px solid rgba(0,0,0,.2); border-radius: var(--border-radius-md); box-shadow: 0 5px 15px rgba(0,0,0,.5); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem; border-bottom: 1px solid var(--border-color); background-color: var(--primary-color); color: white; border-top-left-radius: var(--border-radius-md); border-top-right-radius: var(--border-radius-md); }
.modal-title { font-family: var(--font-heading); }
.modal-close-btn { background: transparent; border: 0; font-size: 1.5rem; color: #fff; opacity: .75; cursor: pointer; }
.modal-close-btn:hover { opacity: 1; }
.modal-body { padding: 1.5rem; max-height: 80vh; overflow-y: auto;}
.modal-footer { display: flex; justify-content: flex-end; padding: 1rem; border-top: 1px solid var(--border-color); gap: 8px; }
.modal-footer .btn { width: auto; padding: 10px 20px; }
.modal-backdrop { position: fixed; top: 0; left: 0; z-index: 1040; width: 100vw; height: 100vh; background-color: #000; visibility: hidden; opacity: 0; transition: all 0.2s; }
.modal-backdrop.is-visible { visibility: visible; opacity: 0.5; }
.hub-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 1.5rem; font-size: 14px; margin-bottom: 1rem; }

/* --- MODAL CHART CONTROLS AND LAYOUT --- */
.chart-controls {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1rem;
}
.chart-controls .form-group {
    flex-grow: 1; 
    margin-bottom: 0; 
}
.chart-controls .btn {
    flex-shrink: 0; 
    width: auto;   
}
.charts-grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.chart-timeline-full-width {
    grid-column: 1 / -1; 
}
.spinner-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(255, 255, 255, 0.7); display: flex; justify-content: center; align-items: center; z-index: 1060; }
.spinner { border: 5px solid #f3f3f3; border-top: 5px solid var(--primary-color); border-radius: 50%; width: 50px; height: 50px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* --- Other page layouts --- */
.pagination-nav { margin-top: 30px; }
.pagination-list { display: flex; justify-content: center; gap: 8px; list-style: none; }
.pagination-list .btn { width: auto; padding: 10px 15px; }
.alert { margin-bottom: 20px; padding: 15px; border-radius: var(--border-radius-md); border: 1px solid transparent; }
.alert-success { background-color: #d4edda; color: #155724; border-color: #c3e6cb; }
.alert-warning { background-color: #fff3cd; color: #856404; border-color: #ffeeba; }
.alert-danger { background-color: #f8d7da; color: #721c24; border-color: #f5c6cb; }
.config-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.config-table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }
.config-table th, .config-table td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
.config-table th { font-weight: 600; font-size: 0.9rem; color: var(--text-secondary); }
.config-table th a { color: var(--text-secondary); text-decoration: none; }
.config-table th a:hover { color: var(--text-primary); }
.action-cell { text-align: right; width: 1%; white-space: nowrap; }
.action-cell > * { margin-left: 8px; display: inline-block; }
.btn-icon { background: none; border: none; cursor: pointer; padding: 5px; font-size: 1.1rem; color: var(--text-secondary); transition: color 0.2s; }
.btn-icon.edit:hover { color: var(--accent-color); }
.btn-icon.delete:hover { color: var(--danger-color); }
.profile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; }

.add-form {
    display: flex;
    gap: 10px;
    align-items: center;
}
.add-form .form-control-inline {
    flex-grow: 1;
    margin: 0;
}
.add-form .btn {
    width: auto;
    flex-shrink: 0;
}
.add-service-form-grid {
    display: grid;
    grid-template-columns: minmax(150px, 1.5fr) auto auto 1fr; 
    gap: 10px;
    align-items: center;
}
.add-service-form-grid .form-control-inline,
.add-service-form-grid .form-group {
    margin-bottom: 0;
}

.form-check-group {
    display: flex;
    align-items: center;
    white-space: nowrap; 
    margin: 0 15px;
}

.form-check-input {
    margin-right: 8px;
}

.btn-sm {
    padding: 12px 16px;
    font-size: 16px;
}

/* --- FIX for Color Picker Input --- */
.form-control-color {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    padding: 0;
    border: 1px solid var(--border-color);
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    background-color: transparent;
    cursor: pointer;
}
.form-control-color::-webkit-color-swatch-wrapper {
    padding: 4px;
}
.form-control-color::-webkit-color-swatch {
    border: none;
    border-radius: 6px;
}
.form-control-color::-moz-color-swatch {
    border: none;
    border-radius: 6px;
}

/* --- Responsive Overrides --- */
@media (max-width: 992px) {
    .sidebar { transform: translateX(calc(-1 * var(--sidebar-width))); }
    .sidebar.is-open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .mobile-menu-btn { display: block; }
    .profile-grid { grid-template-columns: 1fr; }
}

@media (min-width: 992px) {
    .grid-2-col { grid-template-columns: repeat(2, 1fr); }
    .grid-3-col { grid-template-columns: repeat(3, 1fr); }
    .page-content { padding: 2.5rem; }
    .form-selects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 30px; }
}

@media (min-width: 1200px) {
    .config-grid { grid-template-columns: repeat(auto-fit, minmax(450px, 1fr)); }
}