:root {
    --bg-color: #0a0a0a;
    --text-color: #e0e0e0;
    --accent-color: #4a9effb0;
    --accent-color-alt: #ff6b4ab0;
    --muted-color: #888;
    --border-color: #333;
    --archive-color: #666;
}

/* Light theme - warm parchment aesthetic */
[data-theme="light"] {
    --bg-color: #f5f1e8;
    --text-color: #2c2416;
    --accent-color: #2d5aa0;
    --accent-color-alt: #b8472a;
    --muted-color: #6b5d47;
    --border-color: #d4c7b0;
    --archive-color: #8b7355;
}

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

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.7;
    color: var(--text-color);
    background: var(--bg-color);
    min-height: 100vh;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(74, 158, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(74, 158, 255, 0.03) 0%, transparent 50%);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Light theme background pattern adjustment */
[data-theme="light"] body {
    background-image:
        radial-gradient(circle at 20% 20%, rgba(45, 90, 160, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(184, 71, 42, 0.06) 0%, transparent 50%);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 60px;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 2.5rem;
    font-weight: normal;
    letter-spacing: 2px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--muted-color);
    font-style: italic;
    margin-bottom: 30px;
}

footer {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.mystery-note {
    font-size: 0.9rem;
    color: var(--muted-color);
    font-style: italic;
    margin-top: 30px;
}

/* Theme toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0.7;
    z-index: 100;
}

.theme-toggle:hover {
    opacity: 1;
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.theme-toggle::before {
    content: '◐';
    font-size: 16px;
    color: var(--text-color);
    transition: transform 0.3s ease;
}

[data-theme="light"] .theme-toggle::before {
    transform: rotate(180deg);
}

@media (max-width: 600px) {
    .container {
        padding: 20px 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .theme-toggle {
        top: 15px;
        right: 15px;
        width: 28px;
        height: 28px;
    }
    
    .theme-toggle::before {
        font-size: 14px;
    }
}