:root {
    --bg: #03050a;
    --surface: #0a0d14;
    --text: #e0e2e8;
    --text-secondary: #a0a5b5;
    --border: rgba(255,255,255,0.06);
    --input-bg: rgba(255,255,255,0.05);
    --input-border: rgba(255,255,255,0.08);
    --accent: #4f8fff;
    --accent2: #a78bfa;
    --card-bg: rgba(18,22,30,0.7);
    --btn-outline-bg: rgba(255,255,255,0.03);
    --btn-outline-border: rgba(255,255,255,0.15);
    --hero-title: #ffffff;
    --user-bubble: #4f8fff;
    --assistant-bubble: #1e2230;
    --sidebar-width: 300px;
    --sidebar-collapsed-width: 60px;
}

[data-theme="light"] {
    --bg: #f5f6fa;
    --surface: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #4a4a6a;
    --border: rgba(0,0,0,0.08);
    --card-bg: rgba(255,255,255,0.9);
    --btn-outline-bg: rgba(0,0,0,0.02);
    --btn-outline-border: rgba(0,0,0,0.2);
    --hero-title: #0a0a1a;
    --input-bg: rgba(0,0,0,0.02);
    --input-border: rgba(0,0,0,0.2);
    --user-bubble: #4f8fff;
    --assistant-bubble: #e9ecef;
}

@media (prefers-color-scheme: light) {
    [data-theme="system"] {
        --bg: #f5f6fa;
        --surface: #ffffff;
        --text: #1a1a2e;
        --text-secondary: #4a4a6a;
        --border: rgba(0,0,0,0.08);
        --card-bg: rgba(255,255,255,0.9);
        --btn-outline-bg: rgba(0,0,0,0.02);
        --btn-outline-border: rgba(0,0,0,0.2);
        --hero-title: #0a0a1a;
        --input-bg: rgba(0,0,0,0.02);
        --input-border: rgba(0,0,0,0.2);
        --user-bubble: #4f8fff;
        --assistant-bubble: #e9ecef;
    }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
}

img { max-width: 100%; height: auto; }
button, input, select, textarea { font-family: inherit; }