:root {
    --primary-color: #7EC8E3; /* Pastel Blue */
    --secondary-color: #F8F5E6; /* Warm Beige */
    --accent-color: #FFB347; /* Pastel Orange/Gold */
    --text-color: #555;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: #f9fafe;
    color: var(--text-color);
}

.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.navbar-brand {
    font-weight: bold;
    color: var(--primary-color) !important;
}

.hero-section {
    background-color: var(--secondary-color);
    padding: 2rem 0;
    border-radius: 15px;
    margin-bottom: 2rem;
}

.search-card {
    background: #fff;
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    padding: 1.5rem;
}

.material-card {
    border: none;
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
    background: #fff;
    height: 100%;
    overflow: hidden;
    cursor: pointer;
}

.material-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.material-thumb {
    height: 200px;
    background-color: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.material-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.material-dummy-icon {
    font-size: 3rem;
    color: #ccc;
}

.btn-primary-custom {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    border-radius: 20px;
    padding: 0.5rem 1.5rem;
}

.btn-primary-custom:hover {
    background-color: #6bb0c9;
    border-color: #6bb0c9;
    color: #fff;
}

.testament-selector .btn-check:checked + .btn-outline-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.tag-badge {
    background-color: #e9ecef;
    color: #555;
    font-size: 0.8rem;
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    margin-right: 5px;
}