:root {
    --primary: #00f2fe;
    --secondary: #4facfe;
    --bg: #0b1120;
    --sidebar-bg: #111827;
    --card-bg: rgba(30, 41, 59, 0.5);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #f8fafc;
    --text-dim: #94a3b8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg);
    background-image: 
        radial-gradient(circle at 0% 0%, rgba(0, 242, 254, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(79, 172, 254, 0.1) 0%, transparent 50%);
    color: var(--text);
    font-family: 'Outfit', sans-serif;
    min-height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--glass-border);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    -webkit-text-fill-color: var(--primary);
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.5));
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-links li {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 0.5rem;
    cursor: pointer;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.nav-links li i {
    font-size: 1.1rem;
}

.nav-links li:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
}

.nav-links li.active {
    background: rgba(0, 242, 254, 0.1);
    color: var(--primary);
    border: 1px solid rgba(0, 242, 254, 0.2);
}

.status-indicator {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot.green {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

/* Main Content Styles */
.content {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
    position: relative;
}

.page {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

header {
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-dim);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    transition: var(--transition);
}

.glass:hover {
    border-color: rgba(0, 242, 254, 0.3);
    transform: translateY(-5px);
}

.card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.card-icon.cpu { background: rgba(0, 242, 254, 0.1); color: var(--primary); }
.card-icon.ram { background: rgba(79, 172, 254, 0.1); color: var(--secondary); }
.card-icon.storage { background: rgba(16, 185, 129, 0.1); color: var(--success); }

.card-info {
    flex-grow: 1;
}

.card-info h3 {
    font-size: 0.875rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-info .value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

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

.progress {
    height: 100%;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    width: 0%;
    transition: width 1s ease-in-out;
}

/* Chart Container */
.chart-container {
    padding: 2rem;
    height: 400px;
}

.chart-container h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dim);
}

/* Settings Styles */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.settings-card.full-width {
    grid-column: span 2;
}

.settings-card h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.input-group {
    margin-bottom: 1.25rem;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
}

.input-group input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text);
    outline: none;
    transition: var(--transition);
}

.input-group input:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.08);
}

.thresholds {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: #0b1120;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 242, 254, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border: 1px solid var(--glass-border);
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--sidebar-bg);
    border: 1px solid var(--primary);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    transform: translateY(150%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
}

@media (max-width: 1024px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
    .settings-card.full-width {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 80px;
        padding: 1.5rem 0.5rem;
    }
    .logo span, .nav-links li span, .status-indicator span {
        display: none;
    }
    .nav-links li {
        justify-content: center;
        padding: 1rem;
    }
}