/* Global Styles */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;500;700&display=swap');

:root {
    --bg-color: #f0f4f8;
    --text-color: #2d3748;
    --primary-color: #5a67d8;
    --secondary-color: #4c51bf;
    --accent-color: #ed8936;
    --success-color: #48bb78;
    --error-color: #f56565;
    --card-bg: #ffffff;
    --font-stack: 'Outfit', sans-serif;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 600px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

/* Header & Titles */
h1 {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

.subtitle {
    color: #718096;
    margin-bottom: 2rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Menus & Buttons */
.menu-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

@media (min-width: 480px) {
    .menu-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.btn {
    background-color: var(--bg-color);
    border: 2px solid transparent;
    border-radius: 12px;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    color: var(--text-color);
    font-family: var(--font-stack);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    margin-top: 1rem;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* Difficulty Colors */
.diff-1 { border-left: 5px solid #48bb78; } /* Kindergarten - Green */
.diff-2 { border-left: 5px solid #4299e1; } /* Elementary - Blue */
.diff-3 { border-left: 5px solid #ed8936; } /* Junior High - Orange */
.diff-4 { border-left: 5px solid #f56565; } /* University - Red */

/* Game Screen */
.status-bar {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: #a0aec0;
}

.score-display span { color: var(--primary-color); }
.timer-display span { color: var(--accent-color); }

.question-area {
    margin: 2rem 0;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.flag-display {
    font-size: 8rem;
    line-height: 1;
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 5px 15px rgba(0,0,0,0.2));
}

.name-display {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    animation: popIn 0.3s ease;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.option-btn {
    background: linear-gradient(135deg, #e6f0ff 0%, #f0e6ff 100%);
    border: 3px solid #a0aec0;
    border-radius: 15px;
    padding: 1.5rem 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    font-family: var(--font-stack);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.option-btn:hover {
    border-color: #5a67d8;
    background: linear-gradient(135deg, #dce9ff 0%, #e8dcff 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.option-btn.correct {
    background-color: var(--success-color);
    color: white;
    border-color: var(--success-color);
    animation: popIn 0.3s;
}

.option-btn.wrong {
    background-color: var(--error-color);
    color: white;
    border-color: var(--error-color);
    animation: shake 0.4s;
}

/* End Screen */
.result-header {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.final-score {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary-color);
    margin: 1rem 0;
}

.hidden {
    display: none !important;
}

/* Feedback Overlay (for later polish if needed) */
/* currently handled by button states */