/* 파일 최상단에 추가 */
html {
    transition: color 0.3s ease, background-color 0.3s ease;
}

:root {
    --bg-color: #121212;
    --container-bg-color: #2c2420; /* 어두운 갈색으로 변경 */
    --text-color: #ffffff;
    --text-color-selected: #a0a0a0;
    --primary-color: #4a90e2;
    --secondary-color: #9e9e9e;
    --button-bg-color: #424242;
    --button-text-color: #e0e0e0;
    --button-selected-bg-color: #616161;
    --button-selected-text-color: #ffffff;
    --button-correct-bg-color: #43a047;
    --button-incorrect-bg-color: #e53935;
    --next-button-bg-color: #4a90e2;
    --button-disabled-color: #3a3a3c;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 초기 로딩 시 트랜지션 방지 */
.no-transition {
    transition: none !important;
}

/* 다크 모드 스타일을 :root에 직접 적용 */
:root.dark-mode {
    --primary-color: #BB86FC;
    --secondary-color: #03DAC5;
    --background-color: #121212;
    --text-color: #E0E0E0;
    --card-background: #1E1E1E;
    --shadow-color: rgba(255, 255, 255, 0.1);
}

/* 공통 스타일 */
body {
    background-color: #333333;
    color: #ffffff;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding-top: 50px; /* 상단 여백을 100px에서 50px로 수정 */
    box-sizing: border-box;
}

body.index-page, body:not(.index-page) {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 50px; /* 100px에서 50px로 수정 */
    box-sizing: border-box;
}

#quiz-container {
    background-color: var(--container-bg-color);
    background-image: 
        url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.75" numOctaves="5" stitchTiles="stitch"/><feColorMatrix type="saturate" values="0"/></filter><rect width="200" height="200" filter="url(%23noise)" opacity="0.15"/></svg>'),
        linear-gradient(to right bottom, rgba(255, 255, 255, 0.05) 0%, rgba(0, 0, 0, 0.05) 100%);
    background-blend-mode: overlay, normal;
    border-radius: 15px;
    padding: 30px;
    width: 90%;
    max-width: 400px;
    margin: 20px auto;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

#quiz-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            45deg,
            rgba(255, 255, 255, 0.02),
            rgba(255, 255, 255, 0.02) 1px,
            transparent 1px,
            transparent 2px
        );
    opacity: 0.3;
    pointer-events: none;
}

#quiz-container::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.05) 75%, transparent 75%, transparent);
    background-size: 20px 20px;
    opacity: 0.1;
    pointer-events: none;
}

@keyframes paper-movement {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(1deg); }
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

#level-instruction {
    text-align: center;
    font-size: 14px;
    margin-bottom: 20px;
    color: #9e9e9e;
}

#level-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.level-button {
    background-color: #1e3a5f; /* 다크 블루 계열 */
    color: #ffffff;
    border: none;
    padding: 15px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.level-button:hover {
    background-color: #2c5282; /* 호버 시 약간 밝은 블루 */
}

/* 개별 난이도 버튼의 스타일을 제거합니다 */
.level-button[data-level="초등"],
.level-button[data-level="중등"],
.level-button[data-level="고등"],
.level-button[data-level="토익"] {
    background-color: #1e3a5f; /* 모든 버튼에 동일한 배경색 적용 */
}

#quiz-info, #result-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--secondary-color);
}

#level-info {
    color: var(--primary-color);
}

#word-box {
    background-color: #f0f0f0; /* 밝은 회색으로 변경 */
    color: #333333; /* 텍스트 색상을 어두운 색으로 변경 */
    border-radius: 10px;
    padding: 20px;
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* 약간의 그림자 추가 */
}

#level-buttons, #choices, #result-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.level-button, .choice-button, #restart-button, #home-button, #next-button {
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
}

.level-button:hover, .choice-button:hover, #restart-button:hover, #home-button:hover, #next-button:hover {
    opacity: 0.8;
}

.level-button:disabled, .choice-button:disabled, #restart-button:disabled, #home-button:disabled, #next-button:disabled {
    background-color: var(--button-disabled-color);
    color: var(--secondary-color);
    cursor: not-allowed;
}

#next-button {
    display: block;
    width: 100%;
    margin-top: 20px;
}

#quiz-result {
    text-align: center;
}

#result-message, #result-percentage {
    font-size: 18px;
    margin: 10px 0;
    text-align: center;
}

.result-button {
    margin-top: 20px;
}

#home-button {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

#home-button:hover {
    background-color: #6d6d72;
}

#level-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-color);
}

/* 반응형 디자인 */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .intro-box {
        padding: 20px;
    }
}

#quiz-header {
    text-align: center;
    margin-bottom: 20px;
}

#level-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    color: #4CAF50;
}

#word-box {
    font-size: 2rem;
    text-align: center;
    margin: 2rem 0;
    font-weight: bold;
}

#choices {
    display: flex;
    flex-direction: column;
    gap: 5px; /* 버튼 사이의 간격을 5px로 설정 */
}

.choice-button {
    background-color: #424242;
    color: #ffffff;
    border: none;
    padding: 15px 20px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    height: 50px;
    width: 100%;
    text-align: center;
}

.choice-button:hover,
.choice-button:focus {
    background-color: var(--button-selected-bg-color);
}

.choice-button.selected {
    background-color: var(--button-selected-bg-color);
    color: var(--text-color-selected);
}

.choice-button.correct {
    background-color: var(--button-correct-bg-color) !important;
    color: var(--text-color) !important;
}

.choice-button.incorrect {
    background-color: var(--button-incorrect-bg-color) !important;
    color: var(--text-color) !important;
}

.choice-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

#next-button {
    background-color: var(--next-button-bg-color);
    color: var(--text-color);
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
    margin-top: 20px;
}

#next-button:hover {
    opacity: 0.9;
}

/* 결과 페이지 스타일 */
#quiz-container h2 {
    text-align: center;
    color: #4CAF50;
}

#quiz-container p {
    text-align: center;
    margin: 10px 0;
}

/* 파일 하단에 추가 */
#quiz-container, #choices button, #word-box, .start-button, .level-button, #next-button {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

#next-button {
    display: none;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

/* 기존 스타일은 유지하고 아래 내용을 추가 또는 수정합니다 */

body.index-page {
    background-color: #121212;
    color: #e0e0e0;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.intro-box {
    background-color: var(--container-bg-color);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--box-shadow);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.intro-box h1 {
    color: var(--text-color);
    margin-bottom: 30px;
}

.level-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.level-button {
    background-color: var(--button-bg-color);
    border: none;
    color: var(--button-text-color);
    padding: 12px 20px;
    border-radius: 20px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
}

/* 각 난이도별 낮은 채도의 파스텔 톤 색상 */
.level-button[data-level="초등"] {
    background-color: #1e3a5f; /* 다크 블루 계열 */
    color: #ffffff;
}

.level-button[data-level="중등"] {
    background-color: #1e3a5f; /* 다크 블루 계열 */
    color: #ffffff;
}

.level-button[data-level="고등"] {
    background-color: #1e3a5f; /* 다크 블루 계열 */
    color: #ffffff;
}

.level-button[data-level="토익"] {
    background-color: #1e3a5f; /* 다크 블루 계열 */
    color: #ffffff;
}

.level-button:hover {
    background-color: #2c5282; /* 호버 시 약간 밝은 블루 */
}

.level-button:disabled {
    background-color: #C0C0C0; /* 더 부드러운 회색 */
    color: #696969; /* 진한 회색 텍스트 */
    cursor: not-allowed;
}

#restart-button, #home-button {
    flex: 1;
    width: auto; /* 이 줄을 추가합니다 */
    max-width: 45%; /* 이 줄을 추가합니다 */
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    margin: 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

#restart-button:hover, #home-button:hover {
    background-color: #45a049;
}

#quiz-container {
    background-color: #1e1e1e;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 10px rgba(255,255,255,0.1);
    max-width: 400px;
    width: 100%;
    text-align: center;
}

#quiz-result {
    text-align: center;
}

#result-message, #result-percentage {
    margin: 10px 0;
    font-size: 1.1em;
}

.button-container {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 20px;
}

.result-button {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

#home-button {
    background-color: #3498db;
    color: white;
}

#home-button:hover {
    background-color: #2980b9;
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 1.8rem;
    }

    #word-box {
        font-size: 2rem;
        padding: 20px;
    }

    .choice-button, .level-button, #restart-button, #home-button, #next-button {
        padding: 10px 16px;
        font-size: 0.9em;
    }
}

#result-buttons {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 20px;
    flex-direction: row; /* 이 줄을 추가합니다 */
}

#result-buttons button {
    flex: 1;
    padding: 10px;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    color: white;
    transition: background-color 0.3s;
}

#restart-button {
    background-color: #4CAF50;
}

#home-button {
    background-color: #3498db;
}

#restart-button:hover, #home-button:hover {
    filter: brightness(1.1);
}

@media (max-width: 480px) {
    #quiz-container {
        padding: 20px;
    }

    h1 {
        font-size: 20px;
    }

    #word-box {
        font-size: 24px;
    }

    .level-button, .choice-button, #restart-button, #home-button, #next-button {
        padding: 10px 16px;
        font-size: 14px;
    }
}

/* 기존 스타일은 유지하고 아래 내용을 추가 또는 수정합니다 */

h1 {
    color: #ffffff;
    text-align: center;
    margin-bottom: 20px;
}

#current-level {
    font-size: 0.8em;
    color: #4CAF50;
    margin-left: 10px;
}

#quiz-info {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 10px;
    color: #9e9e9e;
}

#word-box {
    background-color: #f0f0f0; /* 밝은 회색으로 변경 */
    color: #333333; /* 텍스트 색상을 어두운 색으로 변경 */
    border-radius: 10px;
    padding: 20px;
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); /* 약간의 그림자 추가 */
}

#choices {
    display: flex;
    flex-direction: column;
    gap: 5px; /* 버튼 사이의 간격을 5px로 설정 */
}

.choice-button {
    background-color: #424242;
    color: #ffffff;
    border: none;
    padding: 15px 20px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    height: 50px; /* 버튼 높이 증가 */
}

.choice-button:hover {
    background-color: #616161;
}

#next-button {
    background-color: #4a90e2;
    color: #ffffff;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
    margin-top: 20px;
}

#next-button:hover {
    background-color: #357ae8;
}

.choice-spacer {
    height: 5px; /* 버튼 사이의 간격을 5px로 설정 */
}