:root {
    /* Colors - Dark Theme Focus */
    --bg-darker: #0f172a;
    --bg-dark: #1e293b;
    --bg-panel: #334155;
    --bg-hover: #475569;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    --border-color: #334155;
    --border-light: #475569;

    --font-main: 'Inter', sans-serif;
    
    --transition: all 0.2s ease;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-darker);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 { font-weight: 600; color: var(--text-main); }
p { color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-family: var(--font-main);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.btn-large {
    padding: 12px 24px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

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

.btn-secondary { background-color: var(--bg-panel); color: var(--text-main); }
.btn-secondary:hover { background-color: var(--bg-hover); }

.btn-success { background-color: var(--success); color: white; }
.btn-success:hover { filter: brightness(1.1); }

.btn-danger { background-color: var(--danger); color: white; }
.btn-danger:hover { filter: brightness(1.1); }

.btn-outline { background-color: transparent; border: 1px solid var(--border-light); color: var(--text-main); }
.btn-outline:hover { background-color: var(--bg-panel); }

/* Utility Classes */
.hidden { display: none !important; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }