@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

body {
    background-color: #F4F4F9; /* 밝은 배경색 */
    color: #333333; /* 어두운 텍스트 색 */
    font-family: 'Pretendard', sans-serif;
    line-height: 1.6;
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header-image-container {
    position: relative;
    height: 400px;
    background-image: url('https://images.unsplash.com/photo-1571019613454-1cb2f99b2d8b?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    border-radius: 0 0 30px 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.header-image-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 0 0 30px 30px;
}

header {
    position: relative;
    color: #ffffff;
    padding: 20px;
}

h1 {
    font-size: 3.5em;
    font-weight: 800;
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.5);
    margin: 0;
}

header p {
    font-size: 1.3em;
    font-weight: 400;
    max-width: 600px;
    margin: 10px auto 0;
    color: #f0f0f0;
}

main {
    padding: 40px 20px;
}

.button-group {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px; /* 여백 조정 */
}

#workout-description {
    max-width: 800px;
    margin: 0 auto 30px;
    padding: 20px 25px;
    background-color: #ffffff;
    border-radius: 12px;
    border: 1px solid #e0e0e0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    text-align: center;
    font-size: 1.1em;
    color: #495057;
}

#workout-description strong {
    color: #007bff;
    font-weight: 700;
}

button.day-btn {
    padding: 15px 30px; /* 패딩 증가 */
    font-size: 1.2em; /* 폰트 사이즈 증가 */
    line-height: 1.4;
}

button.day-btn small {
    font-size: 0.8em;
    font-weight: 500;
    color: inherit; /* 부모 색상 상속 */
}


button {
    background-color: #ffffff;
    color: #333;
    border: 1px solid #ddd;
    padding: 12px 25px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

button:hover, button.active {
    background-color: #007bff;
    color: #ffffff;
    border-color: #007bff;
    box-shadow: 0 6px 15px rgba(0, 123, 255, 0.2);
    transform: translateY(-2px);
}

.controls {
    text-align: center;
    margin-bottom: 40px;
}

#change-workout {
    background-color: #28a745;
    color: #ffffff;
    border-color: #28a745;
}

#change-workout:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

#workout-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}