:root {
    --primary-color: #6A0DAD;
    --accent-color: #8B2FD6;
    --text-color: #2a2a2e;
    --light-text: #5a5a66;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: #e3e3e8;
    --code-bg: #f3f0f8;
    --pre-bg: #1c1f2b;
    --pre-text: #e6e6e6;
    --tag-bg: rgba(106, 13, 173, 0.1);
    --shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --primary-color: #B98CE8;
    --accent-color: #C9A3F0;
    --text-color: #e6e6e6;
    --light-text: #a8a8b3;
    --bg-color: #0f1117;
    --card-bg: #171a23;
    --border-color: #2c3040;
    --code-bg: #22263400;
    --code-bg: #232838;
    --pre-bg: #0b0d13;
    --pre-text: #dfe4ee;
    --tag-bg: rgba(185, 140, 232, 0.15);
    --shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.75;
    transition: background 0.3s ease, color 0.3s ease;
}

a { color: var(--primary-color); text-decoration: none; }
a:hover { text-decoration: underline; }

.blog-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 14px 0;
}

.blog-nav .inner {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.back-link:hover { text-decoration: none; gap: 12px; transition: gap 0.2s ease; }

.theme-toggle {
    background: var(--tag-bg);
    border: none;
    color: var(--primary-color);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.theme-toggle:hover { background: var(--primary-color); color: #fff; transform: rotate(20deg); }

article {
    max-width: 820px;
    margin: 0 auto;
    padding: 50px 22px 90px;
}

.post-meta {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.post-tag {
    background: var(--primary-color);
    color: #fff;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.post-sub { color: var(--light-text); font-size: 0.82rem; }

article h1 {
    font-size: 2.1rem;
    line-height: 1.25;
    margin-bottom: 12px;
    color: var(--text-color);
}

.lede {
    font-size: 1.12rem;
    color: var(--light-text);
    margin-bottom: 36px;
    padding-bottom: 26px;
    border-bottom: 1px solid var(--border-color);
}

article h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 40px 0 14px;
}

article h3 {
    font-size: 1.15rem;
    margin: 28px 0 10px;
}

article p { margin-bottom: 18px; color: var(--text-color); }

article ul, article ol {
    margin: 0 0 18px 24px;
    color: var(--text-color);
}
article li { margin-bottom: 8px; }

article code {
    font-family: 'SFMono-Regular', Consolas, Menlo, monospace;
    background: var(--code-bg);
    color: var(--primary-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.88em;
}

article pre {
    background: var(--pre-bg);
    color: var(--pre-text);
    padding: 18px 20px;
    border-radius: 10px;
    overflow-x: auto;
    margin-bottom: 22px;
    font-size: 0.86rem;
    line-height: 1.6;
    border: 1px solid var(--border-color);
}

article pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

blockquote {
    border-left: 4px solid var(--accent-color);
    background: var(--tag-bg);
    padding: 12px 20px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 22px;
    color: var(--light-text);
}
blockquote p:last-child { margin-bottom: 0; }

.callout {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}
.callout strong { color: var(--primary-color); }

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 40px 0;
}

.post-footer {
    margin-top: 50px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    color: var(--light-text);
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
}

.disclaimer {
    font-size: 0.85rem;
    color: var(--light-text);
    background: var(--code-bg);
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 30px;
}

@media (max-width: 600px) {
    article h1 { font-size: 1.6rem; }
    article { padding: 34px 18px 70px; }
}