.signup-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: #f9fafb;
    /* 살짝 밝은 배경 */
    padding: 2rem;
    max-width: 400px;
    margin: 0 auto;
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
    /* 깔끔한 웹폰트 */
}

.profile-photo {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.profile-photo img {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    cursor: pointer;
    border: 2px solid #e5e7eb;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.profile-photo img:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    /* hover 시 은은한 그림자 */
}

.signup-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    /* 폼과 버튼 사이 여백 */
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: #374151;
    font-size: 0.9rem;
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.btn-primary {
    background-color: #2563eb;
    color: #fff;
    padding: 0.75rem;
    border-radius: 0.75rem;
    font-weight: 600;
    transition: transform 0.1s ease, background-color 0.2s ease;
    border: none;
    cursor: pointer;
    margin-top: 3rem;
    /* 버튼 위쪽 여백 */
}

.btn-primary:hover {
    background-color: #1e40af;
    /* hover 시 조금 더 진한 파란색 */
}

.btn-primary:active {
    transform: scale(0.95);
}