:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --card-bg-color: #ffffff;
    --card-border-color: #e9ecef;
    --card-hover-bg-color: #ffffff;
    --card-shadow: 0 4px 6px rgba(0,0,0,0.05);
    --card-hover-shadow: 0 10px 20px rgba(0,0,0,0.1);
    --details-bg-color: #ffffff;
    --accent-color: #4dabf7;
}

[data-theme='dark'] {
    --bg-color: #121212;
    --text-color: #e9ecef;
    --card-bg-color: #1e1e1e;
    --card-border-color: #2c2c2c;
    --card-hover-bg-color: #252525;
    --card-shadow: 0 4px 6px rgba(0,0,0,0.3);
    --card-hover-shadow: 0 10px 20px rgba(0,0,0,0.5);
    --details-bg-color: #1e1e1e;
    --accent-color: #339af0;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding-top: 80px;
    transition: background-color 0.4s, color 0.4s;
    line-height: 1.6;
}

.container {
    text-align: center;
    max-width: 1000px;
    width: 90%;
    margin-bottom: 60px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

#main-subtitle {
    font-size: 1.1rem;
    color: #868e96;
    margin-bottom: 40px;
}

.controls {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    gap: 12px;
}

#theme-btn, #lang-btn {
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 12px;
    border: 1px solid var(--card-border-color);
    background-color: var(--card-bg-color);
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--card-shadow);
    transition: all 0.2s;
}

#theme-btn:hover, #lang-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-hover-shadow);
}

.mbti-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.mbti-card {
    background-color: var(--card-bg-color);
    border: 1px solid var(--card-border-color);
    border-radius: 20px;
    padding: 30px 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.mbti-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--accent-color);
}

.mbti-card svg {
    width: 60px;
    height: 60px;
    margin-bottom: 5px;
}

.mbti-type-name {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.mbti-details {
    margin-top: 50px;
    padding: 40px;
    background-color: var(--details-bg-color);
    border-radius: 24px;
    border: 1px solid var(--card-border-color);
    text-align: left;
    display: none;
    box-shadow: var(--card-hover-shadow);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

#mbti-title {
    font-size: 2rem;
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.detail-section {
    margin-bottom: 25px;
}

.detail-header {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
    display: block;
    color: var(--text-color);
}

.detail-content {
    color: #868e96;
    font-size: 1rem;
    white-space: pre-line;
}

[data-theme='dark'] .detail-content {
    color: #adb5bd;
}