@import url('https://fonts.googleapis.com/css2?family=Zcool+KuaiLe&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Bangers&display=swap');

:root {
    --comic-font-cn: 'Zcool KuaiLe', cursive, system-ui;
    --comic-font-en: 'Bangers', cursive, system-ui;
    --primary-color: #ff0055; /* Hot Pink */
    --secondary-color: #00ccff; /* Cyan */
    --accent-color: #ffcc00; /* Yellow */
    --dark-color: #111;
    --bg-color: #f0f0f0;
    --border-width: 4px;
    --shadow-offset: 6px;
}

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(#d1d5db 1px, transparent 1px);
    background-size: 20px 20px; /* Halftone effect */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark-color);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* --- Comic Panels --- */
.comic-panel {
    background: white;
    border: var(--border-width) solid var(--dark-color);
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--dark-color);
    padding: 2rem;
    margin-bottom: 3rem;
    position: relative;
    transition: transform 0.2s;
    /* Irregular look */
    border-radius: 2px 5px 3px 6px;
}

.comic-panel:hover {
    transform: scale(1.01) rotate(-0.5deg);
}

.panel-title {
    position: absolute;
    top: -25px;
    left: -10px;
    background: var(--accent-color);
    color: var(--dark-color);
    padding: 10px 20px;
    font-family: var(--comic-font-cn);
    font-size: 1.5rem;
    border: var(--border-width) solid var(--dark-color);
    box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
    transform: rotate(-2deg);
    z-index: 10;
}

/* --- Speech Bubbles --- */
.dialog-box {
    background: #fff;
    border: 3px solid var(--dark-color);
    border-radius: 20px;
    padding: 1.5rem;
    margin: 1.5rem 0 1.5rem 5rem;
    position: relative;
    font-size: 1.1rem;
    box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
}

/* Speech Bubble Tail */
.dialog-box::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 25px;
    width: 0;
    height: 0;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    border-right: 20px solid var(--dark-color);
}
.dialog-box::after {
    content: '';
    position: absolute;
    left: -14px;
    top: 28px;
    width: 0;
    height: 0;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    border-right: 17px solid #fff;
}

/* Character Specific Bubbles */
.char-david { 
    border-color: #0ea5e9; /* Sky Blue */
    background: #f0f9ff;
}
.char-david .character-avatar {
    background: #0ea5e9;
    color: #fff;
    border-color: #0284c7;
    font-size: 3rem;
}
.char-david::before { border-right-color: #0ea5e9; }
.char-david::after { border-right-color: #f0f9ff; }

.char-html { border-color: #333; border-style: solid; border-radius: 5px; } /* HTML is square */

.char-goliath {
    background: #2a0a0a;
    color: #ef4444;
    border: 4px dashed #b91c1c;
    border-radius: 2px;
    transform: rotate(1deg);
    font-family: 'Courier New', monospace;
}
.char-goliath::before { border-right-color: #b91c1c; }
.char-goliath::after { border-right-color: #2a0a0a; }

/* The Little Fox (formerly Glitchy) */
.char-fox {
    border-color: #f97316; /* Orange */
    background: #fff7ed;
    font-family: 'Comic Sans MS', 'Chalkboard SE', cursive, sans-serif;
}
.char-fox .character-avatar {
    background: #f97316;
    color: #fff;
    border-color: #c2410c;
}
.char-fox::before { border-right-color: #c2410c; }
.char-fox::after { border-right-color: #fff7ed; }

/* Legacy support (map to new styles if needed, or keep for transition) */
.char-css { /* Maps to David style for now if not replaced */
    border-color: #0ea5e9;
}
.char-glitch { /* Maps to Fox style */
    border-color: #f97316;
    background: #fff7ed;
}

/* Avatars */
.character-avatar {
    position: absolute;
    left: -85px;
    top: 0;
    width: 70px;
    height: 70px;
    border: 3px solid var(--dark-color);
    border-radius: 50%;
    overflow: hidden;
    background: white;
    box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    z-index: 5;
}

/* --- Typography --- */
h1, h2, h3 {
    font-family: var(--comic-font-cn);
    text-transform: uppercase;
}

.comic-header h1 {
    font-size: 4rem;
    color: var(--primary-color);
    text-shadow: 4px 4px 0 var(--dark-color);
    -webkit-text-stroke: 2px var(--dark-color);
    letter-spacing: 2px;
    transform: rotate(-2deg);
    text-align: center;
    margin: 1rem 0;
}

/* --- Code Blocks --- */
pre {
    background: #282c34;
    color: #abb2bf;
    padding: 1.5rem;
    border: 3px solid var(--dark-color);
    border-radius: 10px;
    position: relative;
    overflow-x: auto;
    font-family: 'Consolas', monospace;
    box-shadow: 5px 5px 0 rgba(0,0,0,0.3);
}

pre::before {
    content: 'CSS 魔法卷轴';
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--accent-color);
    color: black;
    padding: 2px 10px;
    font-family: var(--comic-font-cn);
    border: 2px solid var(--dark-color);
    font-size: 0.9rem;
    transform: rotate(3deg);
}

code {
    font-family: 'Consolas', monospace;
    color: #d63384;
    background: rgba(0,0,0,0.05);
    padding: 2px 4px;
    border-radius: 3px;
}

/* --- Navigation & Buttons --- */
.nav-bar {
    background: var(--dark-color);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 4px solid var(--primary-color);
}

.nav-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
}

.home-link {
    color: var(--accent-color);
    font-family: var(--comic-font-cn);
    text-decoration: none;
    font-size: 1.5rem;
    text-shadow: 2px 2px 0 #000;
}

.nav-btn {
    display: inline-block;
    padding: 10px 30px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    font-family: var(--comic-font-cn);
    font-size: 1.5rem;
    border: 3px solid var(--dark-color);
    box-shadow: 4px 4px 0 var(--dark-color);
    transform: skew(-10deg);
    transition: all 0.2s;
}

.nav-btn:hover {
    transform: skew(-10deg) translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark-color);
    background: #ff3377;
}

.nav-btn.secondary {
    background: white;
    color: var(--dark-color);
}

/* --- Chapter Cards (Game Map) --- */
.chapter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.chapter-card {
    display: block; /* Fix: Ensure it behaves as a block element even outside grid */
    background: white;
    border: 3px solid var(--dark-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--dark-color);
    position: relative;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.1);
    overflow: hidden;
}

.chapter-card:hover {
    transform: translateY(-5px) rotate(1deg);
    box-shadow: 10px 10px 0 var(--primary-color);
    border-color: var(--primary-color);
}

.chapter-num {
    position: absolute;
    top: -5px;
    right: -5px;
    font-family: var(--comic-font-en);
    font-size: 4rem;
    color: rgba(0,0,0,0.05);
    z-index: 0;
}

.chapter-title {
    font-family: var(--comic-font-cn);
    font-size: 1.4rem;
    display: block;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

/* Gamification & Story Elements */
.challenge-card {
    background: #fff;
    border-color: #f59e0b;
    color: #333;
    position: relative;
    overflow: hidden;
}

.challenge-card:hover {
    background: #fffbeb;
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.5);
    border-color: #fbbf24;
    transform: translateY(-5px) rotate(1deg);
}

.challenge-card .chapter-title {
    color: #d97706;
}

.challenge-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.easter-egg {
    cursor: help;
    border-bottom: 2px dashed #f59e0b;
    position: relative;
    display: inline-block;
}

.easter-egg:hover::after {
    content: attr(data-egg);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #fef3c7;
    border: 2px solid #000;
    padding: 10px;
    border-radius: 8px;
    width: 200px;
    text-align: center;
    font-size: 0.9rem;
    color: #333;
    z-index: 100;
    box-shadow: 4px 4px 0 rgba(0,0,0,0.1);
}

.level-locked {
    filter: grayscale(1);
    opacity: 0.7;
    pointer-events: none;
    position: relative;
}

.level-locked::after {
    content: '🔒 LOCKED';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-10deg);
    background: #333;
    color: white;
    padding: 5px 15px;
    font-family: var(--comic-font-cn);
    border: 2px solid white;
    font-size: 1.2rem;
    border-radius: 20px;
}

/* Character Styles */
.char-glitch {
    border-color: #f97316; /* Orange */
    background: #fff7ed;
    font-family: 'Comic Sans MS', 'Chalkboard SE', cursive, sans-serif;
}

.char-glitch .character-avatar {
    background: #f97316;
    color: #fff;
    border-color: #c2410c;
}

.char-glitch::before { border-right-color: #c2410c; }
.char-glitch::after { border-right-color: #fff7ed; }

/* Quiz Styles */
.quiz-container {
    background: white;
    border: 3px solid #000;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 8px 8px 0 rgba(0,0,0,0.1);
}

.quiz-option {
    display: block;
    width: 100%;
    padding: 1rem;
    margin: 0.5rem 0;
    border: 2px solid #ccc;
    border-radius: 12px; /* Softer corners */
    cursor: pointer;
    text-align: left;
    font-family: var(--comic-font-cn);
    font-size: 1.1rem;
    transition: all 0.2s;
    background: white;
}

.quiz-option:hover {
    background: #f0f9ff;
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.quiz-option.correct {
    background: #dcfce7;
    border-color: #22c55e;
    position: relative;
}

.quiz-option.correct::after {
    content: '🌟';
    float: right;
}

.quiz-option.wrong {
    background: #fee2e2;
    border-color: #ef4444;
    position: relative;
}

.quiz-option.wrong::after {
    content: '🤔';
    float: right;
}

.quiz-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    display: none;
}

.quiz-feedback.show { display: block; }

/* --- Utilities --- */
.highlight {
    background: var(--accent-color);
    padding: 0 5px;
    box-shadow: 2px 2px 0 var(--dark-color);
    transform: rotate(-1deg);
    display: inline-block;
}

.fun-tip {
    border: 3px dashed var(--accent-color);
    background: #fffbeb;
    padding: 1.5rem;
    border-radius: 10px;
    margin: 2rem 0;
    position: relative;
}
.fun-tip::before {
    content: '💡 PRO TIP';
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--accent-color);
    color: black;
    padding: 0 10px;
    font-family: var(--comic-font-cn);
    border: 2px solid var(--dark-color);
    transform: rotate(-2deg);
}

/* Sound Effects (Text) */
.sfx {
    font-family: var(--comic-font-en);
    font-size: 2rem;
    position: absolute;
    color: var(--primary-color);
    text-shadow: 2px 2px 0 black;
    z-index: 20;
    pointer-events: none;
    animation: pop 0.5s ease-out;
}

@keyframes pop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.5); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

/* --- Training Ground (Exercises) --- */
.training-ground {
    background: #fff;
    border: 4px solid var(--primary-color);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 3rem;
    margin-bottom: 2rem;
    position: relative;
    box-shadow: 8px 8px 0 rgba(0,0,0,0.1);
}

.training-title {
    position: absolute;
    top: -20px;
    left: 20px;
    background: var(--primary-color);
    color: white;
    padding: 5px 20px;
    font-family: var(--comic-font-cn);
    font-size: 1.5rem;
    border: 3px solid var(--dark-color);
    transform: rotate(-1deg);
    box-shadow: 3px 3px 0 var(--dark-color);
}

.code-input-group {
    margin: 1.5rem 0;
    font-family: monospace;
    font-size: 1.1rem;
    background: #f1f5f9;
    padding: 1rem;
    border-radius: 8px;
    border: 2px solid #cbd5e1;
}

.code-input {
    background: white;
    border: 2px solid #94a3b8;
    padding: 5px 10px;
    font-family: monospace;
    font-size: 1.1rem;
    color: #0f172a;
    border-radius: 4px;
    width: 150px;
}

.check-btn {
    background: var(--primary-color);
    color: white;
    border: 3px solid var(--dark-color);
    padding: 10px 20px;
    font-family: var(--comic-font-cn);
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 4px 4px 0 var(--dark-color);
    transition: all 0.2s;
}

.check-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark-color);
}

.result-msg {
    margin-top: 15px;
    padding: 10px;
    border-radius: 6px;
    font-family: var(--comic-font-cn);
    display: none;
    animation: slideDown 0.3s ease-out;
}

.result-msg.success {
    background: #dcfce7;
    border: 2px solid #22c55e;
    color: #166534;
}

.result-msg.error {
    background: #fee2e2;
    border: 2px solid #ef4444;
    color: #991b1b;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Construction Workshop --- */
.workshop-section {
    background: #fffbeb; /* Light yellow */
    border: 4px dashed #f59e0b; /* Amber */
    border-radius: 12px;
    padding: 2rem;
    margin-top: 3rem;
    margin-bottom: 2rem;
    position: relative;
    box-shadow: 8px 8px 0 rgba(0,0,0,0.1);
}

.workshop-title {
    position: absolute;
    top: -20px;
    right: 20px;
    background: #f59e0b;
    color: black;
    padding: 5px 20px;
    font-family: var(--comic-font-cn);
    font-size: 1.5rem;
    border: 3px solid var(--dark-color);
    transform: rotate(2deg);
    box-shadow: 3px 3px 0 var(--dark-color);
}

.step-card {
    background: white;
    border: 2px solid #000;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 4px 4px 0 #ddd;
}

.step-badge {
    background: #000;
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: bold;
    margin-right: 8px;
    font-family: var(--comic-font-en);
}

.code-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(244, 114, 182, 0.2);
}

.quiz-option {
    transition: all 0.2s;
}
.quiz-option.selected {
    background: #e0f2fe;
    border-color: #0ea5e9;
    font-weight: bold;
}