:root {
    --bg-main: #0f111a;
    --bg-card: #1a1d2d;
    --bg-input: #23273b;
    --text-primary: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --success: #10b981;
    --danger: #ef4444;
    --border: #2e344e;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
}

.navbar {
    background-color: var(--bg-card);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.logout-btn {
    color: var(--danger);
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-box {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    text-align: center;
}

.login-box h2 {
    margin-bottom: 0.5rem;
}

.login-box .text-muted {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-muted);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"],
select.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
}

select.form-select {
    appearance: none;
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.2em;
    cursor: pointer;
}

input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    font-family: inherit;
}

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

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

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

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

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

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    display: block;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.search-input {
    max-width: 300px;
}

.hosts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.host-card {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    overflow: hidden;
}

.host-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    border-color: var(--accent);
}

.host-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.host-card-title {
    font-weight: 600;
    font-size: 1.125rem;
}

.host-card-ip {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-online {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-offline {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-unknown {
    background-color: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.host-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 600;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    align-items: start;
}

.settings-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.settings-card h3 {
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.settings-card h4 {
    margin: 1.5rem 0 1rem;
    color: var(--text-muted);
}

.input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.input-group input {
    flex: 1 1 120px;
}

.hosts-list {
    margin-top: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
}

.host-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-input);
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
}

.host-item .host-info {
    display: flex;
    flex-direction: column;
}

.host-details-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.host-details-header h2 {
    font-size: 1.75rem;
}

.host-details-header .host-ip {
    color: var(--text-muted);
    font-weight: 400;
}

.period-selector {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-card);
    padding: 0.25rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

.period-selector .btn {
    background: transparent;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.period-selector .btn:hover {
    color: var(--text-primary);
}

.period-selector .btn-active {
    background: var(--accent);
    color: white;
}

.period-selector .btn-active:hover {
    background: var(--accent);
    color: white;
}

.charts-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.chart-box {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    height: 300px;
    position: relative;
}

.text-muted { color: var(--text-muted); }
.mb-3 { margin-bottom: 1rem; }
.divider { height: 1px; background: var(--border); margin: 2rem 0; }
.alert { padding: 1rem; border-radius: 0.5rem; margin-bottom: 1.5rem; }
.alert-error { background: rgba(239, 68, 68, 0.1); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.empty-state { text-align: center; padding: 4rem 0; }
.empty-state h2 { margin-bottom: 1rem; }

.toggle-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-input);
  transition: .4s;
  border: 1px solid var(--border);
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-primary);
  transition: .4s;
}
input:checked + .slider { background-color: var(--accent); border-color: var(--accent); }
input:checked + .slider:before { transform: translateX(20px); }
.slider.round { border-radius: 24px; }
.slider.round:before { border-radius: 50%; }

.hosts-list::-webkit-scrollbar { width: 6px; }
.hosts-list::-webkit-scrollbar-track { background: transparent; }
.hosts-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.hosts-list::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

@media (max-width: 768px) {
    .dashboard-header { flex-direction: column; align-items: stretch; gap: 1rem; }
    .search-input { max-width: 100%; }
    .host-details-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .period-selector { width: 100%; overflow-x: auto; }
}

/* Public Dashboard (TV Mode) */
.public-container {
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.public-card {
    padding: 0.5rem !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 0.5rem;
    border: 2px solid transparent;
    transition: var(--transition);
}

.public-card-icon {
    font-size: 1.5rem !important;
    margin-bottom: 0.25rem;
}

.public-card-title {
    font-size: 0.75rem !important;
    font-weight: 700;
    line-height: 1.1;
    word-break: break-word;
}

.status-online-bg {
    background: linear-gradient(145deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
    border-color: rgba(16, 185, 129, 0.3);
}

.status-offline-bg {
    background: linear-gradient(145deg, rgba(239, 68, 68, 0.25), rgba(239, 68, 68, 0.1));
    border-color: rgba(239, 68, 68, 0.5);
    animation: pulse-border 2s infinite;
}

.status-unknown-bg {
    background: linear-gradient(145deg, rgba(148, 163, 184, 0.15), rgba(148, 163, 184, 0.05));
    border-color: rgba(148, 163, 184, 0.3);
}

@keyframes pulse-border {
    0% { border-color: rgba(239, 68, 68, 0.5); }
    50% { border-color: rgba(239, 68, 68, 1); box-shadow: 0 0 15px rgba(239, 68, 68, 0.5); }
    100% { border-color: rgba(239, 68, 68, 0.5); }
}

/* Tabs */
.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}

.tab-button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition);
}

.tab-button:hover {
    color: var(--text-primary);
}

.tab-button.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* History Table */
.history-table-container {
    width: 100%;
    overflow-x: auto;
    background: var(--bg-card);
    border-radius: 1rem;
    border: 1px solid var(--border);
    margin-top: 2rem;
    padding: 1.5rem;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.history-table th, .history-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.history-table th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
}

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

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem;
    }
    
    .nav-links {
        margin-top: 1rem;
        display: flex;
        overflow-x: auto;
        width: 100%;
        padding-bottom: 0.5rem;
        gap: 1rem;
        -webkit-overflow-scrolling: touch;
    }
    
    .nav-links a {
        margin-left: 0;
        white-space: nowrap;
    }
    
    .nav-links div {
        margin-left: auto !important;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .dashboard-controls {
        width: 100%;
        flex-direction: column;
    }
    
    .dashboard-controls .search-input,
    .dashboard-controls .form-select {
        max-width: 100%;
        width: 100%;
    }
    
    .hosts-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .history-table-container,
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .chart-container {
        height: 250px !important;
    }
    
    .settings-grid,
    .form-group {
        width: 100%;
    }
}