:root {
    --primary-red: #de2910;
    --primary-gold: #ffde00;
    --iso-blue: #1890ff;
    --iso-green: #52c41a;
    --iso-purple: #722ed1;
    --bg-color: #fdfbf7;
    --text-dark: #2c3e50;
    --text-light: #596b7e;
    --glass-bg: rgba(255, 255, 255, 0.92);
    --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(24, 144, 255, 0.03) 0%, transparent 20%);
    color: var(--text-dark);
    font-family: var(--font-body);
    min-height: 100vh;
}

.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== Header ===== */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 35px;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    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: 1.6rem;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.header-content .highlight {
    color: var(--primary-red);
    font-family: var(--font-title);
    font-size: 2rem;
    margin-left: 10px;
}

.subtitle {
    font-family: var(--font-body);
    color: var(--text-light);
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.ideology-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--iso-blue), var(--iso-purple));
    color: white;
    border-radius: 25px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

.badge-icon {
    font-size: 1.3rem;
}

/* ===== Main Stage ===== */
.main-stage {
    display: grid;
    grid-template-columns: 320px 1fr 300px;
    gap: 20px;
    height: calc(100vh - 140px);
    min-height: 600px;
}

.left-panel,
.right-panel,
.center-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border-radius: 14px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* ===== Panel Sections ===== */
.panel-section {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    padding: 18px;
}

.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: 1.05rem;
    color: var(--primary-red);
    font-weight: 700;
}

/* ===== Controls ===== */
.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 600;
}

.styled-select {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 2px solid #e0e0e0;
    background: white;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.2s;
}

.styled-select:hover {
    border-color: var(--iso-blue);
}

.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-btn {
    padding: 12px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    font-family: var(--font-body);
}

.control-btn.primary {
    background: linear-gradient(135deg, var(--iso-blue), #40a9ff);
    color: white;
    box-shadow: 0 4px 10px rgba(24, 144, 255, 0.3);
}

.control-btn.secondary {
    background: white;
    border: 2px solid var(--iso-blue);
    color: var(--iso-blue);
}

.control-btn.action {
    background: linear-gradient(135deg, var(--iso-green), #73d13d);
    color: white;
    box-shadow: 0 4px 10px rgba(82, 196, 26, 0.3);
    margin-top: 10px;
}

.control-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.control-btn:active {
    transform: translateY(0);
}

/* ===== Ideology Content ===== */
.ideology-content h4 {
    color: var(--primary-red);
    margin-bottom: 10px;
    font-size: 1.05rem;
}

.ideology-content p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-light);
    text-align: justify;
}

/* ===== Graphs Container ===== */
.graphs-container {
    display: flex;
    flex: 1;
    gap: 20px;
    min-height: 0;
    /* For flex scrolling */
}

.graph-box {
    flex: 1;
    background: white;
    border-radius: 12px;
    border: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.graph-header {
    padding: 12px 15px;
    background: #f9f9f9;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.graph-header h3 {
    font-size: 1rem;
    color: var(--text-dark);
}

.graph-tag {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    background: #f0f0f0;
    color: #999;
}

.graph-tag.interactive {
    background: #e6f7ff;
    color: var(--iso-blue);
    font-weight: 600;
}

canvas {
    flex: 1;
    width: 100%;
    height: 100%;
    cursor: default;
}

#canvasB {
    cursor: grab;
}

#canvasB:active {
    cursor: grabbing;
}

.divider {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-light);
    gap: 5px;
}

.divider-icon {
    font-size: 2rem;
    font-weight: bold;
    color: var(--iso-blue);
}

.divider-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-red);
}

/* ===== Message Area ===== */
.message-area {
    background: white;
    padding: 15px;
    border-radius: 10px;
    border-left: 4px solid var(--iso-blue);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.message-content {
    font-size: 1rem;
    color: var(--text-dark);
    text-align: center;
}

.message-area.success {
    border-left-color: var(--iso-green);
    background: #f6ffed;
}

.message-area.error {
    border-left-color: var(--primary-red);
    background: #fff1f0;
}

/* ===== Invariants List ===== */
.invariants-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.invariant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.invariant-item.match {
    border-color: var(--iso-green);
    background: #f6ffed;
}

.invariant-item.mismatch {
    border-color: var(--primary-red);
    background: #fff1f0;
}

.inv-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

.inv-value {
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-dark);
}

/* ===== Mapping Panel ===== */
.mapping-panel {
    background: white;
    padding: 15px;
    border-radius: 10px;
    min-height: 100px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.hint-text {
    color: #999;
    text-align: center;
    margin-top: 30px;
    font-size: 0.85rem;
}

.mapping-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 8px;
}

.mapping-item {
    background: #f0f5ff;
    padding: 6px;
    border-radius: 4px;
    text-align: center;
    border: 1px solid #d6e4ff;
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .main-stage {
        grid-template-columns: 1fr;
        height: auto;
    }

    .graphs-container {
        height: 500px;
    }
}