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

:root {
    --bg-color: #000;
    --text-color: #fff;
    --text-muted: #999;
    --text-secondary: #666;
    --border-color: #fff;
    --card-bg: #1a1a1a;
    --card-shadow: rgba(255, 255, 255, 0.05);
}

:root.white-mode {
    --bg-color: #ececec;
    --text-color: #000;
    --text-muted: #666;
    --text-secondary: #999;
    --border-color: #000;
    --card-bg: #fff;
    --card-shadow: rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
    overflow-x: hidden;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                color 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}