@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-dark: #0f172a;
    --bg-panel: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.5);
    
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.1) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
}

/* Glassmorphism utility */
.glass {
    background: var(--bg-panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

/* Sidebar */
.sidebar {
    width: 260px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
}

.brand {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.brand i {
    color: var(--accent);
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.nav-item {
    padding: 12px 16px;
    margin-bottom: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.nav-item:hover, .nav-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 32px 40px;
    overflow-y: auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

h1 {
    font-size: 28px;
    font-weight: 600;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.stat-title {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
}

.stat-value.online { color: var(--success); }
.stat-value.offline { color: var(--danger); }
.stat-value.locked { color: var(--warning); }

/* Devices Grid */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.device-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.device-card:hover {
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.device-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 4px;
}

.device-card[data-status="online"]::before { background: var(--success); }
.device-card[data-status="offline"]::before { background: var(--danger); }
.device-card[data-status="locked"]::before { background: var(--warning); }

.device-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.device-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.device-ip {
    font-size: 13px;
    color: var(--text-muted);
}

.status-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.online { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.status-badge.offline { background: rgba(239, 68, 68, 0.2); color: var(--danger); }
.status-badge.locked { background: rgba(245, 158, 11, 0.2); color: var(--warning); }

/* System Resources */
.sys-resources {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.resource {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.res-label {
    font-size: 12px;
    color: var(--text-muted);
}

.progress-bar {
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* Actions */
.device-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 10px;
}

.btn-icon {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-muted);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn-icon:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}

.btn-icon.danger:hover { background: rgba(239, 68, 68, 0.2); color: var(--danger); border-color: rgba(239, 68, 68, 0.5); }
.btn-icon.warning:hover { background: rgba(245, 158, 11, 0.2); color: var(--warning); border-color: rgba(245, 158, 11, 0.5); }
.btn-icon.primary:hover { background: rgba(99, 102, 241, 0.2); color: var(--accent); border-color: rgba(99, 102, 241, 0.5); }
.btn-icon.success:hover { background: rgba(16, 185, 129, 0.2); color: var(--success); border-color: rgba(16, 185, 129, 0.5); }

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    width: 400px;
    padding: 32px;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal h2 {
    margin-bottom: 16px;
    font-size: 22px;
}

.modal p {
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

.pin-display {
    text-align: center;
    font-size: 48px;
    letter-spacing: 8px;
    font-family: monospace;
    font-weight: 700;
    color: var(--accent);
    margin: 24px 0;
    background: rgba(0,0,0,0.3);
    padding: 20px;
    border-radius: 12px;
    border: 1px dashed var(--accent);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-cancel:hover { background: rgba(255,255,255,0.05); color: white; }

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

.btn-confirm:hover { background: var(--accent-hover); box-shadow: 0 0 15px var(--accent-glow); }