@import url('https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&family=Noto+Serif+SC:wght@400;700&family=ZCOOL+KuaiLe&display=swap');

:root {
    /* Imperial Palette */
    --imperial-red: #c02c2c; /* 朱红 */
    --imperial-gold: #f4c632; /* 明黄 */
    --ink-black: #1a1a1a; /* 墨黑 */
    --paper-bg: #fdfbf7; /* 宣纸白 */
    --jade-green: #3d8b76; /* 翡翠绿 */
    --ocean-blue: #1976d2; /* 官服蓝 */
    --purple-pro: #7b1fa2; /* 状师紫 */
    
    /* Character Colors */
    --leibao-bg: #ffebee;
    --leibao-border: #d32f2f;
    --baolongxing-bg: #e3f2fd;
    --baolongxing-border: #1976d2;
    --fangtangjing-bg: #f3e5f5;
    --fangtangjing-border: #7b1fa2;
    
    /* Comic Elements */
    --border-thick: 3px solid var(--ink-black);
    --shadow-hard: 5px 5px 0px var(--ink-black);
    --radius-comic: 8px;
    --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: "ZCOOL KuaiLe", "Ma Shan Zheng", cursive;
}

body {
    background-color: var(--paper-bg);
    color: var(--ink-black);
    font-family: var(--font-body);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23d4c5b0' fill-opacity='0.2'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* --- Header / Nav --- */
nav {
    background-color: var(--ink-black);
    border-bottom: 5px solid var(--imperial-gold);
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

nav a {
    color: var(--imperial-gold);
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    transition: transform 0.2s;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

nav a:hover {
    transform: scale(1.05);
    background-color: rgba(255,255,255,0.1);
    text-shadow: 0 0 10px var(--imperial-red);
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: normal;
}

h1 {
    background: var(--imperial-red);
    color: var(--imperial-gold);
    padding: 15px 30px;
    border: var(--border-thick);
    box-shadow: var(--shadow-hard);
    display: inline-block;
    transform: rotate(-1deg);
    font-size: 2.2rem;
    border-radius: var(--radius-comic);
}

h2 {
    border-bottom: 4px solid var(--imperial-red);
    display: inline-block;
    font-size: 1.8rem;
    padding-bottom: 5px;
}

h3 {
    font-size: 1.5rem;
    color: var(--imperial-red);
    border-left: 5px solid var(--imperial-gold);
    padding-left: 10px;
}

/* --- Main Layout --- */
main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* --- Comic Panel --- */
.comic-panel {
    background: white;
    border: var(--border-thick);
    box-shadow: var(--shadow-hard);
    padding: 2rem;
    margin: 2rem 0 3rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    border-radius: var(--radius-comic);
    position: relative;
}

/* Label for the panel */
.comic-panel::before {
    content: "剧场时刻";
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--imperial-gold);
    color: var(--ink-black);
    padding: 5px 15px;
    font-family: var(--font-heading);
    border: var(--border-thick);
    font-weight: bold;
    transform: rotate(-2deg);
    z-index: 10;
}

.character {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.character img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: var(--border-thick);
    background: #ddd;
    object-fit: cover;
    margin-bottom: -20px;
    z-index: 2;
    box-shadow: 0 5px 10px rgba(0,0,0,0.2);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.character:hover img {
    transform: scale(1.1) rotate(5deg);
}

.bubble {
    background: #fff;
    border: 2px solid #000;
    border-radius: 15px;
    padding: 1.5rem 1rem 1rem 1rem;
    position: relative;
    width: 100%;
    box-sizing: border-box;
    box-shadow: 3px 3px 0 rgba(0,0,0,0.1);
    font-size: 1rem;
    line-height: 1.5;
}

/* Speech bubble pointer */
.bubble::after {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 0 10px 10px;
    border-style: solid;
    border-color: #000 transparent;
    display: block;
    width: 0;
    z-index: 1;
}

.bubble::before {
    content: '';
    position: absolute;
    top: -7px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 0 8px 8px;
    border-style: solid;
    border-color: #fff transparent;
    display: block;
    width: 0;
    z-index: 2;
}

/* Character Specific Styles */
.leibao .bubble {
    background: var(--leibao-bg);
    border-color: var(--leibao-border);
}
.leibao .bubble::after { border-bottom-color: var(--leibao-border); }
.leibao .bubble::before { border-bottom-color: var(--leibao-bg); }

.baolongxing .bubble {
    background: var(--baolongxing-bg);
    border-color: var(--baolongxing-border);
}
.baolongxing .bubble::after { border-bottom-color: var(--baolongxing-border); }
.baolongxing .bubble::before { border-bottom-color: var(--baolongxing-bg); }

.fangtangjing .bubble {
    background: var(--fangtangjing-bg);
    border-color: var(--fangtangjing-border);
}
.fangtangjing .bubble::after { border-bottom-color: var(--fangtangjing-border); }
.fangtangjing .bubble::before { border-bottom-color: var(--fangtangjing-bg); }

.bubble p {
    margin: 0.5rem 0;
}

.bubble strong {
    color: var(--imperial-red);
    font-weight: 900;
}

/* --- Code Blocks --- */
pre {
    background: #282c34;
    color: #abb2bf;
    padding: 1.5rem;
    border-radius: var(--radius-comic);
    overflow-x: auto;
    border: var(--border-thick);
    box-shadow: 5px 5px 0 rgba(0,0,0,0.2);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.95rem;
    position: relative;
    margin: 1.5rem 0;
}

/* Add a "Rust" label to code blocks */
pre::before {
    content: "Rust 秘籍";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--imperial-gold);
    color: var(--ink-black);
    padding: 2px 10px;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    border-bottom-left-radius: 8px;
    font-weight: bold;
}

code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

p code, li code {
    background: #eee;
    padding: 2px 5px;
    border-radius: 3px;
    color: #c02c2c;
    font-weight: bold;
}

/* --- Action Box (Hands-on) --- */
.action-box {
    background: #fff3e0;
    border: 3px dashed var(--imperial-gold);
    padding: 2rem;
    border-radius: var(--radius-comic);
    margin-top: 3rem;
    position: relative;
    text-align: center;
}

.action-box h3 {
    margin-top: 0;
    border: none;
    padding: 0;
}

.action-box summary {
    cursor: pointer;
    font-weight: bold;
    color: var(--imperial-red);
    margin-top: 1rem;
    padding: 0.5rem;
    border: 1px solid var(--imperial-gold);
    border-radius: 5px;
    display: inline-block;
    background: white;
}

/* --- Chapter List (Index) --- */
.chapter-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.chapter-card {
    display: block;
    background: white;
    border: 2px solid var(--ink-black);
    border-radius: var(--radius-comic);
    padding: 1.5rem;
    text-decoration: none;
    color: var(--ink-black);
    position: relative;
    transition: all 0.2s;
    height: 100%;
    box-sizing: border-box;
}

.chapter-card:hover {
    transform: translateY(-5px);
    box-shadow: 5px 5px 0 var(--imperial-gold);
    border-color: var(--imperial-red);
}

.chapter-num {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: rgba(0,0,0,0.1);
    position: absolute;
    top: 5px;
    right: 15px;
    line-height: 1;
}

.chapter-title {
    font-weight: bold;
    font-size: 1.1rem;
    margin-right: 20px;
    z-index: 2;
    position: relative;
}

.status-tag {
    display: inline-block;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    margin-top: 10px;
    font-weight: bold;
}

.status-done {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #2e7d32;
}

.status-todo {
    background: #fff3e0;
    color: #ef6c00;
    border: 1px solid #ef6c00;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 3rem 0;
    margin-top: 3rem;
    border-top: 1px solid #eee;
    color: #666;
    font-size: 0.9rem;
    position:relative;
}    
.comic-panel::before {
    content: "公堂对质";
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--imperial-gold);
    border: var(--border-thick);
    padding: 2px 10px;
    font-weight: bold;
    font-family: 'Ma Shan Zheng', cursive;
    transform: rotate(-2deg);
}

.character {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.character img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: var(--border-thick);
    background: #ddd;
    object-fit: cover;
    margin-bottom: -15px;
    z-index: 2;
}

.bubble {
    position: relative;
    padding: 1.5rem;
    border: var(--border-thick);
    border-radius: 15px;
    background: white;
    font-family: 'ZCOOL KuaiLe', cursive; /* Playful font */
    font-size: 1.1rem;
    line-height: 1.4;
    z-index: 1;
    min-width: 200px;
    margin-top: 10px;
}

/* Bubble Tails */
.bubble::before, .bubble::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    border: solid transparent;
    height: 0;
    width: 0;
    pointer-events: none;
}
.bubble::before {
    border-bottom-color: var(--ink-black);
    border-width: 15px;
    margin-left: -15px;
}
.bubble::after {
    border-bottom-color: white;
    border-width: 11px;
    margin-left: -11px;
}

/* Character Specific Styles */
.leibao img { border-color: var(--leibao-border); }
.leibao .bubble { 
    border-color: var(--leibao-border); 
    background: var(--leibao-bg);
    box-shadow: 3px 3px 0 var(--leibao-border);
}
.leibao .bubble::before { border-bottom-color: var(--leibao-border); }
.leibao .bubble::after { border-bottom-color: var(--leibao-bg); }

.baolongxing img { border-color: var(--baolongxing-border); }
.baolongxing .bubble { 
    border-color: var(--baolongxing-border); 
    background: var(--baolongxing-bg);
    box-shadow: 3px 3px 0 var(--baolongxing-border);
}
.baolongxing .bubble::before { border-bottom-color: var(--baolongxing-border); }
.baolongxing .bubble::after { border-bottom-color: var(--baolongxing-bg); }

.fangtangjing img { border-color: var(--fangtangjing-border); }
.fangtangjing .bubble { 
    border-color: var(--fangtangjing-border); 
    background: var(--fangtangjing-bg);
    box-shadow: 3px 3px 0 var(--fangtangjing-border);
}
.fangtangjing .bubble::before { border-bottom-color: var(--fangtangjing-border); }
.fangtangjing .bubble::after { border-bottom-color: var(--fangtangjing-bg); }

/* --- Content Article --- */
article {
    background: white;
    border: var(--border-thick);
    padding: 2rem;
    box-shadow: var(--shadow-hard);
}

pre {
    background: #282c34;
    color: #abb2bf;
    padding: 1.5rem;
    border: var(--border-thick);
    border-radius: 4px;
    overflow-x: auto;
    font-family: 'Consolas', monospace;
    position: relative;
}

pre::before {
    content: "Rust Code";
    position: absolute;
    top: 0;
    right: 0;
    background: var(--imperial-gold);
    color: var(--ink-black);
    padding: 2px 8px;
    font-size: 0.8rem;
    font-weight: bold;
    border-bottom-left-radius: 4px;
}

code {
    font-family: 'Consolas', monospace;
}

p code, li code {
    background: #ffebee;
    color: #c62828;
    padding: 2px 5px;
    border-radius: 3px;
    border: 1px solid #ef9a9a;
}

/* --- Action Box --- */
.action-box {
    margin-top: 3rem;
    border: 4px dashed var(--imperial-red);
    background: #fff8e1;
    padding: 2rem;
    text-align: center;
    position: relative;
}

.action-box h3 {
    color: var(--imperial-red);
    font-size: 1.8rem;
}

.floating-icon {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

details {
    background: white;
    border: 2px solid var(--ink-black);
    margin-top: 1rem;
    text-align: left;
}

summary {
    background: var(--imperial-gold);
    padding: 10px;
    cursor: pointer;
    font-weight: bold;
    border-bottom: 2px solid var(--ink-black);
}

.answer-code {
    padding: 10px;
}

.answer-code pre {
    border: none;
    box-shadow: none;
    margin: 0;
}

/* --- Index Page Specific --- */
.chapter-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 1.5rem;
}

.chapter-card {
    background: white;
    border: var(--border-thick);
    padding: 1rem;
    display: flex;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: var(--ink-black);
}

.chapter-card:hover {
    transform: translate(-5px, -5px);
    box-shadow: 8px 8px 0 var(--imperial-red);
}

.chapter-num {
    background: var(--ink-black);
    color: var(--imperial-gold);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 1rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.chapter-title {
    font-weight: bold;
    font-size: 1.2rem;
}

.status-tag {
    margin-left: auto;
    font-size: 0.8rem;
    padding: 2px 6px;
    border: 1px solid var(--ink-black);
    border-radius: 4px;
    background: #eee;
}

.status-done {
    background: var(--jade-green);
    color: white;
    border-color: var(--jade-green);
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem;
    background: var(--ink-black);
    color: var(--imperial-gold);
}

/* Responsive */
@media (max-width: 600px) {
    .comic-panel {
        grid-template-columns: 1fr;
    }
    h1 {
        font-size: 1.8rem;
    }
}