:root {
    --primary-red: #de2910;
    --primary-gold: #ffde00;
    --bg-color: #fdfbf7;
    --text-dark: #2c3e50;
    --text-light: #596b7e;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(255, 255, 255, 0.5);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --font-title: 'Ma Shan Zheng', cursive;
    --font-body: 'Outfit', sans-serif;
    --font-serif: 'Noto Serif SC', serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(222, 41, 16, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 222, 0, 0.05) 0%, transparent 20%);
    color: var(--text-dark);
    font-family: var(--font-body);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    border: 1px solid var(--glass-border);
}

.header-content h1 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.header-content .highlight {
    color: var(--primary-red);
    font-family: var(--font-title);
    font-size: 2.2rem;
    margin-left: 10px;
}

.subtitle {
    font-family: var(--font-body);
    color: var(--text-light);
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.header-tabs {
    display: flex;
    gap: 10px;
    background: rgba(0, 0, 0, 0.03);
    padding: 5px;
    border-radius: 12px;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--text-light);
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: white;
    color: var(--primary-red);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Main Stage */
.main-stage {
    display: flex;
    gap: 20px;
    flex: 1;
    overflow: hidden;
}

.workspace {
    flex: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    padding: 30px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.module-section {
    height: 100%;
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.5s ease;
}

.module-section.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-header {
    margin-bottom: 20px;
    text-align: center;
}

.game-header h3 {
    font-family: var(--font-title);
    font-size: 2rem;
    color: var(--primary-red);
    margin-bottom: 10px;
}

.game-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.game-area {
    flex: 1;
    background: #f8f9fa;
    border-radius: 12px;
    border: 2px dashed #e0e0e0;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Sidebar */
.sidebar {
    width: 320px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    padding: 25px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.panel-section {
    margin-bottom: 30px;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-gold);
}

.panel-icon {
    font-size: 1.4rem;
}

.panel-header h3 {
    font-size: 1.1rem;
    color: var(--primary-red);
    font-weight: 700;
}

.insight-content p,
.concept-content p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-light);
    margin-bottom: 12px;
}

/* --- Game Specific Styles --- */

/* Reliability Game */
.production-line {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 40px;
}

.node {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
    position: relative;
    font-size: 0.85rem;
    text-align: center;
}

.node.input {
    background: #e3f2fd;
    border: 2px solid #2196f3;
    color: #1565c0;
}

.node.output {
    background: #e8f5e9;
    border: 2px solid #4caf50;
    color: #2e7d32;
}

.node.processor {
    background: white;
    border: 2px solid #ff9800;
    border-radius: 12px;
    width: 120px;
    height: 60px;
    cursor: pointer;
}

.node.processor:hover {
    transform: scale(1.05);
}

.node.processor.bad {
    border-color: #f44336;
    background: #ffebee;
}

.arrow {
    font-size: 2rem;
    color: #ccc;
}

/* Consistency & Completeness Canvas */
canvas {
    width: 100%;
    height: 100%;
}

/* Godel Tower */
.tower-container {
    position: relative;
    width: 200px;
    height: 400px;
    border-bottom: 4px solid #795548;
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
}

.tower {
    width: 100%;
    background: linear-gradient(to top, #3f51b5, #5c6bc0);
    border-radius: 4px 4px 0 0;
    transition: all 0.3s ease;
}

.star {
    position: absolute;
    top: 20px;
    font-size: 2rem;
    animation: float 2s infinite ease-in-out;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.controls {
    position: absolute;
    bottom: 20px;
    display: flex;
    gap: 15px;
}

.action-btn {
    padding: 12px 24px;
    background: var(--primary-red);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 6px rgba(222, 41, 16, 0.2);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(222, 41, 16, 0.3);
}

.action-btn.special {
    background: var(--primary-gold);
    color: var(--text-dark);
}

.action-btn.hidden {
    display: none;
}

#heightDisplay {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 1.2rem;
    background: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}