:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --secondary-color: #666666;
    --link-color: #000000;
    --active-link-color: #000000;
    --date-color: #999999;
    --button-bg: #000000;
    --button-text: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
    --card-hover: rgba(0, 0, 0, 0.02);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: var(--bg-color);
    transition: background-color 0.3s ease;
}

.back-button {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 16px;
    padding: 8px 16px;
    border-radius: 30px;
    background: transparent;
    border: 1px solid var(--text-color);
    transition: all 0.3s ease;
}

.back-button:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateX(-5px);
}

.back-button i {
    transition: transform 0.3s ease;
}

.back-button:hover i {
    transform: translateX(-3px);
}

.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 80px 20px;
}

.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--text-color);
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.dark-mode-toggle:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: rotate(360deg);
}

.post-header {
    margin-bottom: 40px;
}

.post-meta-top {
    display: flex;
    gap: 16px;
    color: var(--secondary-color);
    font-size: 14px;
    margin-bottom: 16px;
}

.post-header h1 {
    font-size: 32px;
    line-height: 1.3;
    margin: 0 0 16px 0;
}

.tags {
    display: flex;
    gap: 6px;
    margin-bottom: 24px;
}

.tag {
    font-size: 9px;
    padding: 2px 5px;
    border-radius: 4px;
    font-weight: 500;
    letter-spacing: 0.2px;
}

.tag.entertainment {
    background-color: rgba(146, 83, 161, 0.08);
    color: #9253a1;
}

.tag.review {
    background-color: rgba(49, 130, 206, 0.08);
    color: #3182ce;
}

.post-content {
    font-size: 16px;
    line-height: 1.8;
}

.post-intro {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 32px;
    line-height: 1.6;
}

.post-content h2 {
    font-size: 24px;
    margin: 40px 0 16px;
}

.post-content p {
    margin-bottom: 24px;
}

.post-footer {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.back-link {
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.back-link:hover {
    opacity: 0.7;
}

.post-share {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--secondary-color);
}

.share-link {
    color: var(--text-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.share-link:hover {
    opacity: 0.7;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --secondary-color: #b3b3b3;
    --link-color: #ffffff;
    --active-link-color: #ffffff;
    --date-color: #999999;
    --button-bg: #ffffff;
    --button-text: #000000;
    --card-border: rgba(255, 255, 255, 0.1);
    --card-hover: rgba(255, 255, 255, 0.05);
}

body.dark-mode .tag.entertainment {
    background-color: rgba(146, 83, 161, 0.15);
    color: #d6bcdb;
}

body.dark-mode .tag.review {
    background-color: rgba(49, 130, 206, 0.15);
    color: #bde0ff;
}

@media (max-width: 600px) {
    .container {
        padding: 40px 20px;
    }

    .post-header h1 {
        font-size: 28px;
    }

    .post-intro {
        font-size: 16px;
    }

    .post-content h2 {
        font-size: 20px;
    }

    .post-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}