:root {
    --bg-color: #f7f1e3;
    --chicken-gold: #f1c40f;
    --duck-blue: #2980b9;
    --tdn-blue: #34495e;
    --text-dark: #2d3436;
}

body { 
    font-family: 'Segoe UI', sans-serif; 
    background-color: var(--bg-color); 
    margin: 0; 
    display: flex; 
    justify-content: center; 
    align-items: flex-start; 
    min-height: 100vh;
    padding: 40px 20px;
    gap: 30px;
}

/* Sidebar Slogan bên trái */
.motto-side {
    width: 160px;
    font-weight: bold;
    color: var(--tdn-blue);
    text-transform: uppercase;
    font-size: 13px;
    line-height: 1.8;
    opacity: 0.8;
    text-align: right;
    border-right: 3px solid var(--tdn-blue);
    padding-right: 15px;
    margin-top: 20px;
}

/* Sidebar Hướng dẫn bên phải */
.sidebar-help {
    width: 280px;
}

.sidebar-content h3 { margin-top: 0; font-size: 18px; color: var(--tdn-blue); border-bottom: 2px solid #ddd; padding-bottom: 10px; }
.step-desc p { font-size: 13.5px; line-height: 1.5; text-align: left; margin: 5px 0; }

.latex-box { 
    background: white; 
    padding: 10px; 
    border-radius: 8px; 
    border: 1px solid #ddd; 
    margin: 10px 0;
}

@media (max-width: 1100px) {
    body { flex-direction: column; align-items: center; }
    .motto-side { width: 90%; text-align: center; border-right: none; border-bottom: 3px solid var(--tdn-blue); padding-right: 0; padding-bottom: 15px; }
    .sidebar-help { width: 90%; max-width: 450px; }
}

/* Game Container */
.container { background: white; width: 90%; max-width: 450px; padding: 25px; border-radius: 24px; box-shadow: 0 15px 35px rgba(0,0,0,0.1); text-align: center; }

.school-logo { height: 80px; margin-bottom: 10px; }
.main-title { color: var(--tdn-blue); font-size: 22px; margin: 0; }

.permanent-highscore {
    background: #fff3cd; color: #856404; padding: 5px 15px; border-radius: 20px;
    font-weight: bold; font-size: 13px; border: 1px solid #ffeeba; margin-top: 10px; display: inline-block;
}

.primary-btn { background: var(--text-dark); color: white; width: 100%; padding: 15px; border-radius: 12px; font-weight: bold; margin-top: 10px; cursor: pointer; border: none; box-shadow: 0 4px 0 #000; }
.primary-btn:active { transform: translateY(2px); box-shadow: 0 2px 0 #000; }

.box { background: #f9f9f9; padding: 18px; border-radius: 15px; border: 1px solid #eee; margin-bottom: 15px; }

.input-group { display: flex; justify-content: center; gap: 15px; margin: 15px 0; }
.input-field { display: flex; flex-direction: column; gap: 5px; font-weight: bold; font-size: 14px; }
input { width: 80px; padding: 10px; border: 2px solid #ddd; border-radius: 10px; text-align: center; font-size: 18px; }

.stats-container { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin: 15px 0; }
.stat-box { padding: 15px; border-radius: 15px; color: white; }
.chicken { background: var(--chicken-gold); color: #333; }
.duck { background: var(--duck-blue); }
.value { font-size: 28px; font-weight: 900; display: block; }

.clicks-remainHighlight { background: #eee; padding: 8px 15px; border-radius: 20px; font-weight: bold; display: inline-block; margin-bottom: 10px; }

#action-buttons { display: flex; gap: 10px; }
.action-btn { flex: 1; padding: 15px; border-radius: 12px; font-weight: bold; color: white; border: none; cursor: pointer; }
.btn-ga { background: var(--chicken-gold); color: #333; }
.btn-vit { background: var(--duck-blue); }

.hidden { display: none !important; }