/**
 * Base Styles
 * CSS Variables, Reset, Typography, Links
 */

/* =============================================
   CSS Variables (Theme)
   ============================================= */
:root {
    --primary-color: #0066cc;
    --primary-dark: #004d99;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6b6b6b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f4f8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-color: #4d9fff;
    --primary-dark: #3d8bff;
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --text-muted: #888888;
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2d2d2d;
    --border-color: #3d3d3d;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

/* =============================================
   CSS Reset
   ============================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

/* =============================================
   Container
   ============================================= */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* =============================================
   Links
   ============================================= */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}