:root {
    --bg-color: #0d1117;
    --panel-bg: #161b22;
    --border-color: #30363d;
    --text-primary: #c9d1d9;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --accent-glow: rgba(88, 166, 255, 0.4);
    --success: #2ea043;
    --warning: #d29922;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, sans-serif;
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Glassmorphism ambient background glow */
.glass-overlay {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(88, 166, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.brand {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.brand-icon {
    color: var(--accent);
}

.brand h2 {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.version {
    font-size: 0.7rem;
    background: var(--border-color);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--text-muted);
}

.nav-section {
    padding: 20px 16px;
    border-bottom: 1px solid rgba(48, 54, 61, 0.5);
}

.nav-section h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 12px;
    letter-spacing: 1px;
    padding-left: 8px;
}

ul {
    list-style: none;
}

li {
    padding: 10px 12px;
    margin-bottom: 4px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

li:hover {
    background-color: rgba(139, 148, 158, 0.1);
    color: var(--text-primary);
}

li.active {
    background-color: rgba(88, 166, 255, 0.1);
    color: var(--accent);
    border-left: 3px solid var(--accent);
}

li i {
    width: 18px;
    height: 18px;
}

.tier-selector {
    margin-top: auto;
    padding: 20px;
    background-color: rgba(0,0,0,0.2);
}

.tier-selector h3 {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

select {
    width: 100%;
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
    outline: none;
    cursor: pointer;
}

select:focus {
    border-color: var(--accent);
}

/* Main Content */
.content-area {
    flex-grow: 1;
    padding: 40px 60px;
    overflow-y: auto;
    z-index: 10;
    position: relative;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
}

.status-badge {
    background: rgba(46, 160, 67, 0.1);
    color: var(--success);
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid rgba(46, 160, 67, 0.4);
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pulse {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(46, 160, 67, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(46, 160, 67, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(46, 160, 67, 0); }
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.stat-box {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-box .label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.stat-box .value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent);
}

.installation-panel {
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 30px;
}

.panel-header {
    background: var(--panel-bg);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.panel-header i {
    width: 16px;
    height: 16px;
    margin-right: 8px;
    vertical-align: text-bottom;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
}

.copy-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
}

pre {
    padding: 20px;
    overflow-x: auto;
}

code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: #e6edf3;
}

.tier-warning {
    background: rgba(210, 153, 34, 0.1);
    color: var(--warning);
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    border-left: 4px solid var(--warning);
}

.description-panel {
    line-height: 1.6;
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 40px;
}

.download-master-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: #000;
    padding: 14px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 0 20px var(--accent-glow);
    transition: all 0.3s ease;
}

.download-master-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--accent-glow);
}