:root {
    --primary-color: #ff007f;
    /* Jay Pink */
    --secondary-color: #00e5ff;
    /* Jay Blue */
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #ffffff;
    --text-secondary: #aaaaaa;
    --correct-color: #4caf50;
    --wrong-color: #f44336;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans SC', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    /* Prevent scroll on mobile */
}

.app-container {
    width: 100%;
    max-width: 480px;
    /* Mobile first constraint */
    height: 100vh;
    background-color: var(--bg-color);
    position: relative;
    overflow-y: auto;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

/* Page Transitions */
.page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 20px;
    display: flex;
    flex-direction: column;
    transition: opacity 0.3s ease, transform 0.3s ease;
    background-color: var(--bg-color);
}

.page.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
    z-index: 0;
}

.page.active {
    opacity: 1;
    pointer-events: all;
    transform: scale(1);
    z-index: 1;
}

/* Common Styles */
.content-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.btn {
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    border: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.primary-btn {
    background: linear-gradient(45deg, var(--primary-color), #ff5252);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 0, 127, 0.4);
}

.secondary-btn {
    background: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

/* Home Page */
.game-title {
    font-size: 48px;
    margin-bottom: 20px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    color: transparent;
    line-height: 1.2;
}

.game-intro {
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

/* Quiz Page */
.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 14px;
    color: var(--text-secondary);
}

.timer-bar {
    width: 100%;
    height: 6px;
    background-color: #333;
    border-radius: 3px;
    margin-bottom: 5px;
    overflow: hidden;
}

.timer-fill {
    height: 100%;
    background-color: var(--secondary-color);
    width: 100%;
    transition: width 1s linear;
}

.timer-text {
    text-align: right;
    font-size: 12px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.question-container {
    margin-bottom: 30px;
    text-align: center;
}

.difficulty-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.difficulty-badge.easy {
    background-color: #4caf50;
    color: white;
}

.difficulty-badge.medium {
    background-color: #ff9800;
    color: white;
}

.difficulty-badge.hard {
    background-color: #f44336;
    color: white;
}


.media-area {
    margin-bottom: 20px;
    border-radius: 10px;
    overflow: hidden;
    max-height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
}

.media-area img {
    max-width: 100%;
    max-height: 200px;
    object-fit: contain;
}

.audio-control {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--secondary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    color: #000;
    cursor: pointer;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.7);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(0, 229, 255, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(0, 229, 255, 0);
    }
}

.question-text {
    font-size: 20px;
    line-height: 1.4;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option-btn {
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: 10px;
    text-align: left;
    cursor: pointer;
    border: 1px solid #333;
    color: var(--text-color);
    transition: all 0.2s;
}

.option-btn:hover {
    border-color: var(--secondary-color);
    background-color: #2a2a2a;
}

.option-btn.selected {
    border-color: var(--secondary-color);
    background-color: rgba(0, 229, 255, 0.1);
}

.option-btn.correct {
    border-color: var(--correct-color);
    background-color: rgba(76, 175, 80, 0.2);
}

.option-btn.wrong {
    border-color: var(--wrong-color);
    background-color: rgba(244, 67, 54, 0.2);
}

/* Explanation Page */
#explanation-page {
    text-align: center;
    justify-content: center;
}

.result-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.explanation-box {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 15px;
    margin: 30px 0;
    text-align: left;
}

.explanation-box h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 16px;
}

.explanation-box p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.next-timer {
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Result Page */
.final-score {
    font-size: 24px;
    margin-bottom: 30px;
}

.final-score span {
    font-size: 48px;
    color: var(--primary-color);
    font-weight: bold;
}

.fan-level-box {
    margin-bottom: 40px;
}

#fan-level-title {
    font-size: 36px;
    color: var(--secondary-color);
    margin: 10px 0;
    text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

.input-group {
    width: 100%;
    margin-bottom: 20px;
}

.input-group input {
    width: 100%;
    padding: 15px;
    border-radius: 30px;
    border: 2px solid #333;
    background-color: var(--card-bg);
    color: white;
    text-align: center;
    font-size: 16px;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Leaderboard Page */
.leaderboard-list {
    flex: 1;
    overflow-y: auto;
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 10px;
}

.rank-item {
    display: flex;
    justify-content: space-between;
    padding: 15px;
    border-bottom: 1px solid #333;
}

.rank-item:last-child {
    border-bottom: none;
}

.rank-item .rank-num {
    width: 30px;
    font-weight: bold;
    color: var(--secondary-color);
}

.rank-item .rank-name {
    flex: 1;
    text-align: left;
    padding-left: 10px;
}

.rank-item .rank-score {
    font-weight: bold;
    color: var(--primary-color);
}