/* variables.css */
:root {
    /* Color Palette - Premium Slate & Indigo */
    --bg-base: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-surface-hover: #F1F5F9;
    
    --text-main: #0F172A;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    
    --border-light: #E2E8F0;
    --border-strong: #CBD5E1;
    
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* Shadows - Soft & Layered */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.02);
    
    /* Geometry */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Layout */
    --sidebar-width: 260px;
    --header-height: 64px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-smooth: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Reset & Typography */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Global Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-strong);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: var(--bg-surface-hover);
}

.badge {
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
}
.badge-success { background: #D1FAE5; color: #065F46; }
.badge-warning { background: #FEF3C7; color: #92400E; }